### Example Usage of Policy Scope - Pundit

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Ascope

Demonstrates how to obtain the scope class and then use its `resolve` method to get an active record relation.

```ruby
scope = finder.scope #=> UserPolicy::Scope
scope.resolve #=> <#ActiveRecord::Relation ...>
```

--------------------------------

### Initialize PolicyFinder

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Instantiate PolicyFinder with the object for which to find policies. This is the starting point for using the finder.

```ruby
user = User.find(params[:id])
finder = PolicyFinder.new(user)
```

```ruby
# File 'lib/pundit/policy_finder.rb', line 29
def initialize(object)
  @object = object
end
```

--------------------------------

### Get Singleton Instance of NullStore

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/NullStore.instance

Returns the singleton instance of the NullStore. This method is part of the private API and should be used with caution.

```ruby
def instance
  @instance
end
```

--------------------------------

### permissions

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/DSL

Mixed in to all policy example groups to provide a DSL for defining and testing permissions. It allows you to group tests by permission and optionally focus on specific permission tests.

```APIDOC
## permissions(*list, &block)

### Description
This method is mixed in to all policy example groups to provide a DSL for defining and testing permissions. It allows you to group tests by permission and optionally focus on specific permission tests.

### Method
`permissions`

### Parameters
* `list` (`Symbol`, `Array<Symbol>`) - A permission symbol or an array of permission symbols to describe. The last symbol can be `:focus` to mark the example group for focused execution.
* `&block` - A block of RSpec examples to be executed within the context of the specified permissions.

### Request Example
```ruby
describe PostPolicy do
  permissions :show?, :update? do
    it { is_expected.to permit(user, own_post) }
  end
end
```

##### Focused Example Group
```ruby
describe PostPolicy do
  permissions :show?, :update?, :focus do
    it { is_expected.to permit(user, own_post) }
  end
end
```

### Response
This method does not return a value; it configures the RSpec example group.
```

--------------------------------

### Retrieve Policy or Raise Error

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy%21

Use this method to get the policy for a record. It will raise `NotDefinedError` or `InvalidConstructorError` if the policy cannot be found or constructed.

```ruby
def policy!(record)
  cached_find(record, &:policy!)
end
```

--------------------------------

### Define Policy Permissions in RSpec

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/DSL

Use the `permissions` method to define and group authorization checks for a policy. It accepts a list of permission symbols and an optional block for RSpec examples. The `:focus` symbol can be appended to a permission to focus the example group.

```ruby
describe PostPolicy do
  permissions :show?, :update? do
    it { is_expected.to permit(user, own_post) }
  end
end
```

```ruby
describe PostPolicy do
  permissions :show?, :update?, :focus do
    it { is_expected.to permit(user, own_post) }
  end
end
```

--------------------------------

### Copy Application Policy - Pundit Generator

Source: https://www.rubydoc.info/gems/pundit/Pundit/Generators/InstallGenerator%3Acopy_application_policy

Generates the application policy file using a template. This method is part of the Pundit installation generator.

```ruby
def copy_application_policy
  template "application_policy.rb.tt", "app/policies/application_policy.rb"
end
```

--------------------------------

### Get Object Param Key

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Determine the parameter key for the object, which is useful when working with Rails parameters. Handles arrays and class objects.

```ruby
# File 'lib/pundit/policy_finder.rb', line 76
def param_key # rubocop:disable Metrics/AbcSize
  model = object.is_a?(Array) ? object.last : object

  if model.respond_to?(:model_name)
    model.model_name.param_key.to_s
  elsif model.is_a?(Class)
    model.to_s.demodulize.underscore
  else
    model.class.to_s.demodulize.underscore
  end
end
```

--------------------------------

### Get Policy Scope (with error handling)

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieves the policy scope class, raising an error if it cannot be determined. Use this when a scope is strictly required and its absence indicates a configuration problem.

```ruby
# File 'lib/pundit/policy_finder.rb', line 61

def scope!
  scope or raise NotDefinedError, "unable to find scope `#{find(object)}::Scope` for `#{object.inspect}`"
end
```

--------------------------------

### Get Policy Scope

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieves the policy scope class. This is useful for understanding how policies are organized and for potential custom scope implementations.

```ruby
scope = finder.scope #=> UserPolicy::Scope
scope.resolve #=> <#ActiveRecord::Relation ...>
```

```ruby
# File 'lib/pundit/policy_finder.rb', line 40

def scope
  "#{policy}::Scope".safe_constantize
end
```

--------------------------------

### Pundit::RSpec::Matchers.description Method

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/Matchers.description

This private method is used internally by the Pundit `permit` matcher to get a description for authorization checks. It can be configured with a callable object to provide custom descriptions.

```ruby
def description(user, record)
  return @description.call(user, record) if defined?(@description) && @description.respond_to?(:call)

  @description
end
```

--------------------------------

### Get User from Pundit Context

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Auser

This method is used to retrieve the user object associated with the current authorization context. It is a readonly attribute.

```Ruby
def user
  @user
end
```

--------------------------------

### Retrieve Policy Scope with Error Handling

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy_scope%21

Use this method to get the policy scope for an object. It raises `NotDefinedError` if the scope is not found or `InvalidConstructorError` if the policy constructor is incorrect. Ensure the `user` and `pundit_model` are correctly set up.

```ruby
def policy_scope!(scope)
  policy_scope_class = policy_finder(scope).scope!

  begin
    policy_scope = policy_scope_class.new(user, pundit_model(scope))
  rescue ArgumentError
    raise InvalidConstructorError, "Invalid #<#{policy_scope_class}> constructor is called"
  end

  policy_scope.resolve
end
```

--------------------------------

### Get Policy Class with Pundit::PolicyFinder#policy

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Apolicy

Returns the policy class associated with an object. Use this when you need to determine the policy class before performing authorization checks.

```ruby
policy = finder.policy #=> UserPolicy
policy.show? #=> true
policy.update? #=> false
```

```ruby
def policy
  klass = find(object)
  klass.is_a?(String) ? klass.safe_constantize : klass
end
```

--------------------------------

### Get Scope Class with Pundit::PolicyFinder#scope!

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Ascope%21

Use this method to retrieve the scope class associated with an object. It raises `NotDefinedError` if the scope cannot be determined.

```ruby
def scope!
  scope or raise NotDefinedError, "unable to find scope `#{find(object)}::Scope` for `#{object.inspect}`"
end
```

--------------------------------

### Pundit::Context#policy

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy

Retrieves the policy for the given record. This method is used to get an instance of the policy class that can be used to perform query methods.

```APIDOC
## Pundit::Context#policy(record)

### Description
Retrieves the policy for the given record.

### Parameters
#### Path Parameters
* **record** (Object) - The object we're retrieving the policy for.

### Returns
* (Object, nil) - An instance of the policy class with query methods.

### Raises
* (InvalidConstructorError) - If the policy constructor is called incorrectly.

### See Also
* https://github.com/varvet/pundit#policies

### Since
* v2.3.2
```

--------------------------------

### Get Object's Param Key - Pundit::PolicyFinder

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Aparam_key

Returns the name of the key this object would have in a params hash. Handles arrays, classes, and other objects by inferring the key from their model name or class name.

```ruby
def param_key # rubocop:disable Metrics/AbcSize
  model = object.is_a?(Array) ? object.last : object

  if model.respond_to?(:model_name)
    model.model_name.param_key.to_s
  elsif model.is_a?(Class)
    model.to_s.demodulize.underscore
  else
    model.class.to_s.demodulize.underscore
  end
end
```

--------------------------------

### Get Policy Scope Class - Pundit

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Ascope

Use this method to retrieve the associated scope class for a policy. It dynamically constructs the scope class name based on the policy name and attempts to constantize it.

```ruby
def scope
  "#{policy}::Scope".safe_constantize
end
```

--------------------------------

### Pundit::Context#policy_scope!

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy_scope%21

Retrieves the policy scope for the given record. Raises if not found. This method is used to get an instance of the scope class, which can then be used to resolve the scope. It handles potential errors like the policy scope not being defined or the constructor being called incorrectly.

```APIDOC
## Pundit::Context#policy_scope!

### Description
Retrieves the policy scope for the given record. Raises if not found.

### Method
`policy_scope!(scope)`

### Parameters
#### Path Parameters
- **scope** (Object) - The object for which to retrieve the policy scope.

### Returns
- **Scope{#resolve}** - An instance of the scope class which can resolve to a scope.

### Raises
- **NotDefinedError** - If the policy scope cannot be found.
- **InvalidConstructorError** - If the policy constructor is called incorrectly.

### See Also
- https://github.com/varvet/pundit#scopes

### Since
- v2.3.2
```

--------------------------------

### LegacyStore#initialize

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/LegacyStore

Initializes a new instance of LegacyStore. This is a private method and should be used with caution.

```APIDOC
## initialize(hash = {}) 

### Description
Returns a new instance of LegacyStore.

### Method
constructor

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
* **hash** (Hash) - Optional - A hash to initialize the store with.

### Request Example
```ruby
LegacyStore.new({ some_key: 'some_value' })
```

### Response
#### Success Response (200)
* **LegacyStore** - A new instance of LegacyStore.

### Response Example
```ruby
#<LegacyStore:0x00007f8c8c8c8c8c>
```
```

--------------------------------

### Initialize LegacyStore

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/LegacyStore%3Ainitialize

Initializes a new instance of LegacyStore. This method is part of a private API and should be avoided if possible.

```ruby
def initialize(hash = {})
  @store = hash
end
```

--------------------------------

### PolicyFinder#initialize

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Initializes a new PolicyFinder instance with the object for which policies will be found.

```APIDOC
## initialize(object)

### Description
Returns a new instance of PolicyFinder.

### Parameters
#### object
- **object** (any) - Required - The object to find policy and scope classes for.

### Returns
- **PolicyFinder** - A new instance of PolicyFinder.

### Since
- v0.1.0
```

--------------------------------

### Pundit::Context#initialize

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Ainitialize

Initializes a new instance of Context, which holds the user and a cache store for policies.

```APIDOC
## initialize(user:, policy_cache: CacheStore::NullStore.instance)

### Description
Returns a new instance of Context.

### Parameters
#### Path Parameters
- **user** - (type: unspecified) - later passed to policies and scopes
- **policy_cache** (type: CacheStore::NullStore.instance) - Optional - cache store for policies (see e.g. Pundit::CacheStore::NullStore)

### Method
initialize

### Endpoint
N/A (Method Signature)

### Request Example
```ruby
Pundit::Context.new(user: current_user)
```

### Response
#### Success Response
- **Context** - A new instance of the Context class.
```

--------------------------------

### Pundit::PolicyFinder#initialize

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Ainitialize

Initializes a new instance of PolicyFinder. This method takes an object and prepares the finder to locate its associated policy and scope classes.

```APIDOC
## Pundit::PolicyFinder#initialize

### Description
Returns a new instance of PolicyFinder.

### Method
initialize

### Parameters
#### Path Parameters
- **object** (any) - The object to find policy and scope classes for.

### Request Example
```ruby
PolicyFinder.new(user)
```

### Response
#### Success Response (PolicyFinder)
- Returns a new instance of PolicyFinder.

### Since
v0.1.0
```

--------------------------------

### Initialize PolicyFinder

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Ainitialize

Initializes a new PolicyFinder instance with the object to find policies for. This is the primary way to create a PolicyFinder.

```ruby
def initialize(object)
  @object = object
end
```

--------------------------------

### Initialize Pundit::Context Constructor

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Initializes a new Pundit::Context instance. It requires a user and optionally accepts a policy cache store. Defaults to NullStore if no cache is provided.

```ruby
# File 'lib/pundit/context.rb', line 35

def initialize(user:, policy_cache: CacheStore::NullStore.instance)
  @user = user
  @policy_cache = policy_cache
end
```

--------------------------------

### Cache Store Interface: Fetch Method

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore

This method is a template for looking up a stored policy or generating a new one if it's not found. It accepts user, record, and a block for generation. Note that this method itself does not exist in the module but serves as an interface definition.

```Ruby
def fetch(user:, record:, &block)
end
```

--------------------------------

### NullStore.instance

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/NullStore.instance

Returns the singleton instance of the NullStore. This method is part of a private API and should be used with caution.

```APIDOC
## NullStore.instance

### Description
Returns the singleton instance of the NullStore.

### Method
`instance`

### Returns
* (`NullStore`) - the singleton instance
```

--------------------------------

### Pundit::CacheStore::NullStore#fetch Implementation

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/NullStore%3Afetch

This method always yields, bypassing any caching logic. It is part of the private API and should be used with caution.

```ruby
def fetch(*, **)
  yield
end
```

--------------------------------

### Pundit::CacheStore#fetch Method Signature

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore%3Afetch

This is the method signature for `fetch` in `Pundit::CacheStore`. It's a template and the method itself is not implemented in this module. It's used to look up or generate a policy.

```ruby
def fetch(user:, record:, &block)
  
```

--------------------------------

### Pundit::CacheStore::NullStore#fetch

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/NullStore%3Afetch

This method is part of a private API and should be avoided. It always yields and does not cache anything, returning whatever the block returns.

```APIDOC
## Pundit::CacheStore::NullStore#fetch

### Description
Always yields, does not cache anything.

### Method
`fetch(*, **)`

### Parameters
This method accepts arbitrary positional and keyword arguments, which are ignored.

### Yields
* The block passed to the method.

### Returns
* `any` - Whatever the block returns.

### Since
* v2.3.2

### Example
```ruby
Pundit::CacheStore::NullStore.new.fetch do
  # Some operation
  'result'
end
# => 'result'
```
```

--------------------------------

### Authorize Action with Pundit::Context

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Aauthorize

Use this method to authorize an action on a record. It finds the appropriate policy, initializes it, and checks the specified query. Raises NotAuthorizedError if authorization fails.

```ruby
def authorize(possibly_namespaced_record, query:, policy_class:)
  record = pundit_model(possibly_namespaced_record)
  policy = if policy_class
    policy_class.new(user, record)
  else
    policy!(possibly_namespaced_record)
  end

  raise NotAuthorizedError, query: query, record: record, policy: policy unless policy.public_send(query)

  record
end
```

--------------------------------

### Pundit::Context#authorize

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Retrieves the policy for a given record, initializes it with the record and user, and throws an error if the user is not authorized.

```APIDOC
## authorize(possibly_namespaced_record, query:, policy_class:)

### Description
Retrieves the policy for the given record, initializing it with the record and user and finally throwing an error if the user is not authorized to perform the given action.

### Parameters
* possibly_namespaced_record (Object, Array) - The object we're checking permissions of.
* query (Symbol, String) - The predicate method to check on the policy (e.g., `:show?`).
* policy_class (Class) - The policy class we want to force use of.

### Returns
* Object - Always returns the passed object record.

### Raises
* Pundit::NotAuthorizedError - If the given query method returned false.

### Since
* v2.3.2
```

--------------------------------

### Initialize Pundit Context

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Ainitialize

Initializes a new Pundit Context object. It requires a user and optionally accepts a policy cache. The default policy cache is Pundit::CacheStore::NullStore.instance.

```ruby
def initialize(user:, policy_cache: CacheStore::NullStore.instance)
  @user = user
  @policy_cache = policy_cache
end
```

--------------------------------

### Create Policy File

Source: https://www.rubydoc.info/gems/pundit/Pundit/Generators/PolicyGenerator

Generates a new policy file using a template. This method is part of the Rails generator system for Pundit.

```ruby
def create_policy
  template "policy.rb.tt", File.join("app/policies", class_path, "#{file_name}_policy.rb")
end
```

--------------------------------

### Initialize Pundit Context in Sinatra

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Set up a helper method to create a Pundit::Context instance using the current user. This context is then used for authorization checks within Sinatra routes.

```ruby
helpers do
  def current_user = ...

  def pundit
    @pundit ||= Pundit::Context.new(user: current_user)
  end
end

get "/posts/:id" do |id|
  pundit.authorize(Post.find(id), query: :show?)
end
```

--------------------------------

### Pundit::CacheStore#fetch

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore%3Afetch

Looks up a stored policy or generates a new one. This method is a template and does not exist in the current implementation.

```APIDOC
## Pundit::CacheStore#fetch

### Description
Looks up a stored policy or generates a new one. This method is a template and does not exist in the current implementation.

### Method
fetch

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Parameters
* user (Object) - Optional - the user that initiated the action
* record (Object) - Optional - the object being accessed
* block (Proc) - Required - the block to execute if missing

### Request Example
```ruby
Pundit::CacheStore.fetch(user: user, record: record) do
  # block to execute if missing
end
```

### Response
#### Success Response (200)
* Object - the policy

#### Response Example
```json
{
  "policy": "some_policy_object"
}
```
```

--------------------------------

### LegacyStore#fetch

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/LegacyStore

Fetches a value from the cache. If the value is not found, it yields a block to compute and cache the value. This is a private method.

```APIDOC
## fetch(user:, record:) 

### Description
A cache store that uses only the record as a cache key, and ignores the user. `nil` results are not cached.

### Method
private

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
* **user** (Object) - Required - The user object (ignored by this cache store).
* **record** (Object) - Required - The record object to use as the cache key.

### Request Example
```ruby
cache_store.fetch(user: current_user, record: @post) do
  # Compute and return the cached value
  @post.calculate_something
end
```

### Response
#### Success Response (200)
* **Object** - The cached value or the result of the yielded block.

### Response Example
```ruby
# The cached value or the computed result
```
```

--------------------------------

### Pundit::Context#authorize

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Aauthorize

Retrieves the policy for a given record, initializes it with the record and user, and raises an error if the user is not authorized to perform the specified query. It can optionally force the use of a specific policy class.

```APIDOC
## authorize(possibly_namespaced_record, query:, policy_class:) ⇒ Object

### Description
Retrieves the policy for the given record, initializing it with the record and user and finally throwing an error if the user is not authorized to perform the given action.

### Method
authorize

### Parameters
#### Path Parameters
- **possibly_namespaced_record** (Object, Array) - The object we're checking permissions of.
- **query** (Symbol, String) - The predicate method to check on the policy (e.g. `:show?`).
- **policy_class** (Class) - The policy class we want to force use of.

### Returns
- **Object** - Always returns the passed object record.

### Raises
- **NotAuthorizedError** - if the given query method returned false

### Since
- v2.3.2
```

--------------------------------

### Initialize NotAuthorizedError with Options

Source: https://www.rubydoc.info/gems/pundit/Pundit/NotAuthorizedError%3Ainitialize

Use this overload to create an error with detailed information about the authorization failure. It accepts an options hash that can include a custom message, the policy method name, the record being checked, and the policy class.

```ruby
def initialize(options = {})
  if options.is_a? String
    message = options
  else
    @query  = options[:query]
    @record = options[:record]
    @policy = options[:policy]

    message = options.fetch(:message) do
      record_name = record.is_a?(Class) ? record.to_s : "this #{record.class}"
      "not allowed to #{policy.class}##{query} #{record_name}"
    end
  end

  super(message)
end
```

--------------------------------

### Cache Store Interface

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore

The Cache Store Interface defines the contract for cache store implementations, including the `fetch` method.

```APIDOC
## fetch(user:, record:, &block)

### Description
Looks up a stored policy or generates a new one.

### Method
fetch

### Parameters
#### Path Parameters
- None

#### Query Parameters
- None

#### Request Body
- None

### Request Example
```ruby
# Example usage (conceptual, as this is a template)
cache_store.fetch(user: current_user, record: post) do
  Policy.new(current_user, post)
end
```

### Response
#### Success Response (200)
- **policy** (Object) - The policy instance, either fetched or newly generated.

#### Response Example
```json
{
  "policy": "<Policy Instance>"
}
```
```

--------------------------------

### Initialize Pundit Context in Roda

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Create a Pundit::Context instance within a Roda route block. This context is then used to authorize actions on specific records.

```ruby
route do |r|
  context = Pundit::Context.new(user:)

  r.get "posts", Integer do |id|
    context.authorize(Post.find(id), query: :show?)
  end
end
```

--------------------------------

### Generate Policy Test - TestUnit

Source: https://www.rubydoc.info/gems/pundit/TestUnit/Generators/PolicyGenerator

Use this method to generate a new policy test file for TestUnit. It utilizes a template to create the test structure.

```ruby
def create_policy_test
  template "policy_test.rb.tt", File.join("test/policies", class_path, "#{file_name}_policy_test.rb")
end
```

--------------------------------

### Create Policy Spec - Rspec Generator

Source: https://www.rubydoc.info/gems/pundit/Rspec/Generators/PolicyGenerator

Use this method to generate a new RSpec policy specification file. It utilizes a template to create the spec file in the correct directory.

```ruby
def create_policy_spec
  template "policy_spec.rb.tt", File.join("spec/policies", class_path, "#{file_name}_policy_spec.rb")
end
```

--------------------------------

### PolicyFinder#param_key

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Determines the key name for the object as it would appear in a params hash.

```APIDOC
## param_key

### Description
Returns the name of the key this object would have in a params hash.

### Returns
- **String** - The name of the key this object would have in a params hash.

### Since
- v1.1.0
```

--------------------------------

### Pundit RSpec DSL Permissions Implementation

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/DSL%3Apermissions

The core implementation of the `permissions` method in Pundit's RSpec DSL. It handles metadata and creates a described group for the permissions.

```ruby
def permissions(*list, &block)
  metadata = { permissions: list, caller: caller }

  if list.last == :focus
    list.pop
    metadata[:focus] = true
  end

  description = list.to_sentence
  describe(description, metadata) { instance_eval(&block) }
end
```

--------------------------------

### Pundit::NotAuthorizedError#initialize

Source: https://www.rubydoc.info/gems/pundit/Pundit/NotAuthorizedError%3Ainitialize

Initializes a new instance of NotAuthorizedError. It can be initialized with a simple string message or with an options hash for more detailed error information.

```APIDOC
## initialize(message)

### Description
Create an error with a simple error message.

### Parameters
* **message** (String) - A simple error message string.

## initialize(options)

### Description
Create an error with the specified attributes.

### Parameters
* **options** (Hash) - The error options.
  * **:message** (String) - Optional custom error message. Will default to a generalized message.
  * **:query** (Symbol) - The name of the policy method that was checked.
  * **:record** (Object) - The object that was being checked with the policy.
  * **:policy** (Class) - The class of policy that was used for the check.

### Returns
* NotAuthorizedError - A new instance of NotAuthorizedError.
```

--------------------------------

### Define Pundit.policy_scope! Method

Source: https://www.rubydoc.info/gems/pundit/Pundit.policy_scope%21

This method is used to create a new Pundit context and call the policy_scope! method on it. It accepts a user object and any additional arguments or blocks to pass to the context's policy_scope! method.

```Ruby
def policy_scope!(user, *args, **kwargs, &block)
  Context.new(user: user).policy_scope!(*args, **kwargs, &block)
end
```

--------------------------------

### Include Pundit RSpec DSL and Metadata

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/PolicyExampleGroup.included

This method is called when the `PolicyExampleGroup` module is included in a class. It sets the metadata type to `:policy` and extends the base class with Pundit's RSpec DSL.

```ruby
def self.included(base)
  base.metadata[:type] = :policy
  base.extend Pundit::RSpec::DSL
  super
end
```

--------------------------------

### Find Policy Class (with error)

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieve the policy class for the given object, raising a NotDefinedError if the policy cannot be determined. Use this when a policy is expected to exist.

```ruby
# File 'lib/pundit/policy_finder.rb', line 69
def policy!
  policy or raise NotDefinedError, "unable to find policy `#{find(object)}` for `#{object.inspect}`"
end
```

--------------------------------

### Fetch data from cache or compute

Source: https://www.rubydoc.info/gems/pundit/Pundit/CacheStore/LegacyStore%3Afetch

Use this method to retrieve cached data for a given record. If the data is not found in the cache, it will be computed using the provided block. Note that nil results are not cached.

```ruby
def fetch(user:, record:)
  _ = user
  @store[record] ||= yield
end
```

--------------------------------

### Pundit::PolicyFinder#param_key

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Aparam_key

Returns the name of the key this object would have in a params hash.

```APIDOC
## Pundit::PolicyFinder#param_key

### Description
Returns the name of the key this object would have in a params hash.

### Method
`param_key`

### Returns
* `String` - The name of the key this object would have in a params hash.

### Since
* v1.1.0

### Source Code
```ruby
def param_key
  model = object.is_a?(Array) ? object.last : object

  if model.respond_to?(:model_name)
    model.model_name.param_key.to_s
  elsif model.is_a?(Class)
    model.to_s.demodulize.underscore
  else
    model.class.to_s.demodulize.underscore
  end
end
```
```

--------------------------------

### Find Policy Class with Error Handling

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Apolicy%21

Use this method to find the policy class for an object. It raises a NotDefinedError if the policy cannot be determined, providing details about the object and the attempted policy lookup.

```ruby
def policy!
  policy or raise NotDefinedError, "unable to find policy `#{find(object)}` for `#{object.inspect}`"
end
```

--------------------------------

### Focus Permissions in RSpec

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/DSL%3Apermissions

Use the `:focus` keyword to run only the tests within this specific permissions block during RSpec execution.

```ruby
describe PostPolicy do
  permissions :show?, :update?, :focus do
    it { is_expected.to permit(user, own_post) }
  end
end
```

--------------------------------

### Pundit::Context#policy_scope Implementation

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy_scope

Retrieves the policy scope for a given record. It finds the appropriate policy scope class, instantiates it with the user and scope, and then calls the resolve method. Raises InvalidConstructorError if the policy scope class constructor is invalid.

```ruby
def policy_scope(scope)
  policy_scope_class = policy_finder(scope).scope
  return unless policy_scope_class

  begin
    policy_scope = policy_scope_class.new(user, pundit_model(scope))
  rescue ArgumentError
    raise InvalidConstructorError, "Invalid #<#{policy_scope_class}> constructor is called"
  end

  policy_scope.resolve
end
```

--------------------------------

### authorize

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Authorizes an action for a given record. It checks if the user is authorized to perform the specified query on the record using its associated policy.

```APIDOC
## authorize(possibly_namespaced_record, query:, policy_class:)

### Description
Authorizes an action for a given record. It checks if the user is authorized to perform the specified query on the record using its associated policy.

### Parameters
#### Path Parameters
- **possibly_namespaced_record** (Object) - The record to authorize.
- **query** (String) - The query to perform on the policy.
- **policy_class** (Class, optional) - The specific policy class to use.

### Raises
- **NotAuthorizedError**: If the user is not authorized to perform the query.
```

--------------------------------

### PolicyFinder#object

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieves the object associated with this PolicyFinder instance.

```APIDOC
## object

### Description
Retrieves the object associated with this PolicyFinder instance.

### Returns
- **Object** - The object for which policies are being found.

### Since
- v0.1.0
```

--------------------------------

### PolicyFinder#policy!

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Finds and returns the policy class associated with the object, raising an error if not found.

```APIDOC
## policy!

### Description
Finds and returns the policy class associated with the object. This method will raise an error if the policy cannot be determined.

### Returns
- **Class** - The policy class.

### Raises
- **NotDefinedError** - If the policy could not be determined.

### Since
- v0.1.0
```

--------------------------------

### Define Permissions in RSpec

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/DSL%3Apermissions

Use this to define a block of tests for specific permissions. It groups tests related to the listed permissions.

```ruby
describe PostPolicy do
  permissions :show?, :update? do
    it { is_expected.to permit(user, own_post) }
  end
end
```

--------------------------------

### Retrieve Policy for a Record - Ruby

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy

Retrieves the policy for a given record. Raises InvalidConstructorError if the policy constructor is called incorrectly. See Also: https://github.com/varvet/pundit#policies

```ruby
def policy(record)
  cached_find(record, &:policy)
end
```

--------------------------------

### Include Pundit Authorization in Controllers

Source: https://www.rubydoc.info/gems/pundit/Pundit/Authorization

Include this module in your ApplicationController to provide authorization helpers throughout your application. This is the standard way to integrate Pundit.

```ruby
class ApplicationController < ActionController::Base
  include Pundit::Authorization
end
```

--------------------------------

### Pundit::RSpec::DSL#permissions

Source: https://www.rubydoc.info/gems/pundit/Pundit/RSpec/DSL%3Apermissions

The `permissions` method is used to group authorization tests for specific actions. It accepts a list of actions (as symbols) and an optional `:focus` keyword. A block is yielded to define the individual test cases for these permissions.

```APIDOC
## Pundit::RSpec::DSL#permissions

### Description
Defines a block of tests for a given set of permissions. Accepts a list of permission symbols and an optional `:focus` keyword. The block passed to `permissions` is evaluated in the context of the policy example group.

### Method Signature
`permissions(*list, &block)`

### Parameters
- `*list` (Array<Symbol, String, Symbol>) - A list of symbols representing the actions to test, optionally ending with `:focus` to focus the example group.
- `&block` (Proc) - A block containing the RSpec examples for the specified permissions.

### Returns
`void` - This method does not return a value; it defines an RSpec example group.

### Examples
#### Basic Usage
```ruby
describe PostPolicy do
  permissions :show?, :update? do
    it { is_expected.to permit(user, own_post) }
  end
end
```

#### Focused Example Group
```ruby
describe PostPolicy do
  permissions :show?, :update?, :focus do
    it { is_expected.to permit(user, own_post) }
  end
end
```

### Since
v0.1.0
```

--------------------------------

### policy!

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Retrieves the policy for the given record, raising an error if it cannot be found. This method is similar to `policy` but ensures a policy is always returned or an error is raised.

```APIDOC
## policy!(record)

### Description
Retrieves the policy for the given record, raising an error if it cannot be found. This method is similar to `policy` but ensures a policy is always returned or an error is raised.

### Parameters
#### Path Parameters
- **record** (Object) - The object for which to retrieve the policy.

### Returns
- **Object**: An instance of the policy class with query methods.

### Raises
- **NotDefinedError**: If the policy cannot be found.
- **InvalidConstructorError**: If the policy constructor is called incorrectly.
```

--------------------------------

### scope!

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieves the policy scope class and raises an error if it cannot be determined. This method is a stricter version of `scope`.

```APIDOC
## scope!

### Description
Retrieves the policy scope class and raises an error if it cannot be determined. This method is a stricter version of `scope`.

### Method
`scope!`

### Returns
* (`Scope{#resolve}`) — scope class which can resolve to a scope

### Raises
* (`NotDefinedError`) — if scope could not be determined
```

--------------------------------

### Authorize Action with Pundit::Context

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Checks if the user is authorized to perform a specific query on a record. Throws NotAuthorizedError if the action is not permitted. The policy class can be explicitly specified.

```ruby
# File 'lib/pundit/context.rb', line 62

def authorize(possibly_namespaced_record, query:, policy_class:)
  # ... implementation details ...
end
```

--------------------------------

### Pundit::Context#policy!

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy%21

Retrieves the policy for the given record, or raises an error if not found. This method is useful for ensuring a policy exists before performing an action.

```APIDOC
## Pundit::Context#policy!

### Description
Retrieves the policy for the given record, or raises if not found.

### Method
`policy!(record)`

### Parameters
#### Path Parameters
- **record** (Object) - Required - The object we're retrieving the policy for.

### Returns
- **Object** - An instance of the policy class with query methods.

### Raises
- **NotDefinedError** - If the policy cannot be found.
- **InvalidConstructorError** - If the policy constructor is called incorrectly.

### See Also
- https://github.com/varvet/pundit#policies

### Since
- v2.3.2
```

--------------------------------

### PolicyFinder#policy

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Finds and returns the policy class associated with the object.

```APIDOC
## policy

### Description
Finds and returns the policy class associated with the object. If the policy class cannot be determined, it returns nil.

### Examples
```ruby
policy = finder.policy #=> UserPolicy
policy.show? #=> true
policy.update? #=> false
```

### Returns
- **nil, Class** - The policy class or nil if not found.

### See Also
- https://github.com/varvet/pundit#policies

### Since
- v0.1.0
```

--------------------------------

### Pundit::Helper#policy_scope

Source: https://www.rubydoc.info/gems/pundit/Pundit/Helper%3Apolicy_scope

This private method delegates to pundit_policy_scope. It is part of the internal implementation and should be avoided by users.

```ruby
def policy_scope(scope)
  pundit_policy_scope(scope)
end
```

--------------------------------

### policy

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Retrieves the policy for the given record. This method caches the policy instance for efficiency.

```APIDOC
## policy(record)

### Description
Retrieves the policy for the given record. This method caches the policy instance for efficiency.

### Parameters
#### Path Parameters
- **record** (Object) - The object for which to retrieve the policy.

### Returns
- **Object**: An instance of the policy class with query methods.

### Raises
- **InvalidConstructorError**: If the policy constructor is called incorrectly.
```

--------------------------------

### Find Scope Class (with error)

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieve the scope class for the given object, raising an error if the scope cannot be determined. Use this when a scope is expected to exist.

```ruby
finder.scope! #=> UserPolicy::Scope
```

--------------------------------

### Pundit::Context#policy_scope

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy_scope

Retrieves the policy scope for the given record. It finds the appropriate policy scope class, instantiates it with the user and the model, and then resolves the scope. Raises `InvalidConstructorError` if the policy constructor is called incorrectly.

```APIDOC
## Pundit::Context#policy_scope

### Description
Retrieves the policy scope for the given record.

### Method
`policy_scope(scope)`

### Parameters
#### Path Parameters
- **scope** (Object) - The record for which to retrieve the policy scope.

### Raises
- **InvalidConstructorError**: If the policy constructor is called incorrectly.

### See Also
- https://github.com/varvet/pundit#scopes

### Since
- v2.3.2
```

--------------------------------

### Accessing the Policy Cache in Pundit Context

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Apolicy_cache

This method retrieves the cached policies for the current context. It is a private API method and should be avoided in favor of public interfaces.

```ruby
def policy_cache
  @policy_cache
end
```

--------------------------------

### Pundit::PolicyFinder#object

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Aobject

Retrieves the object associated with the PolicyFinder instance. This is a read-only attribute.

```APIDOC
## Pundit::PolicyFinder#object

### Description
Retrieves the object associated with the PolicyFinder instance. This is a read-only attribute.

### Method
`object`

### Returns
`Object` - The object associated with the policy finder.

### See Also
- `#initialize`

### Since
- v0.1.0
```

--------------------------------

### Find Policy Class

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieve the policy class for the given object. This method returns the class if found, or nil if not. It's useful for checking policy existence before authorization.

```ruby
finder.policy #=> UserPolicy
```

```ruby
# File 'lib/pundit/policy_finder.rb', line 52
def policy
  klass = find(object)
  klass.is_a?(String) ? klass.safe_constantize : klass
end
```

--------------------------------

### Pundit.policy_scope!

Source: https://www.rubydoc.info/gems/pundit/Pundit.policy_scope%21

This method is used to scope a collection of records based on the current user's policies. It delegates to `Pundit::Context#policy_scope!`.

```APIDOC
## Pundit.policy_scope!

### Description
This method is used to scope a collection of records based on the current user's policies. It delegates to `Pundit::Context#policy_scope!`.

### Method
`policy_scope!(user, *args, **kwargs, &block)`

### Parameters
- **user**: The current user object.
- **args**: Positional arguments passed to the underlying policy scope method.
- **kwargs**: Keyword arguments passed to the underlying policy scope method.
- **block**: A block passed to the underlying policy scope method.

### Returns
- `Object`: The scoped collection of records.
```

--------------------------------

### PolicyFinder Object Attribute

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Access the object that was used to initialize the PolicyFinder. This attribute is read-only.

```ruby
# File 'lib/pundit/policy_finder.rb', line 25
def object
  @object
end
```

--------------------------------

### Pundit::PolicyFinder#policy

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Apolicy

Returns the policy class associated with an object. It finds the policy class and returns it, or `nil` if not found.

```APIDOC
## Pundit::PolicyFinder#policy

### Description
Returns the policy class associated with an object. It finds the policy class and returns it, or `nil` if not found.

### Method
`policy`

### Returns
`nil`, `Class` - The policy class or nil.

### Examples:
```ruby
finder = Pundit::PolicyFinder.new(user)
policy = finder.policy #=> UserPolicy
policy.show? #=> true
policy.update? #=> false
```

### Source Code
```ruby
def policy
  klass = find(object)
  klass.is_a?(String) ? klass.safe_constantize : klass
end
```
```

--------------------------------

### Pundit::PolicyFinder#policy!

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Apolicy%21

Returns the policy class associated with the object. It raises a `NotDefinedError` if a policy cannot be determined.

```APIDOC
## Pundit::PolicyFinder#policy!

### Description
Returns the policy class with query methods. Raises `NotDefinedError` if the policy could not be determined.

### Method
`policy!`

### Returns
`Class` - The policy class.

### Raises
* `NotDefinedError` - If a policy cannot be determined for the object.

### Since
v0.1.0
```

--------------------------------

### Access Pundit Context User

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Retrieves the user associated with the Pundit context. This user is passed to policies and scopes for authorization checks.

```ruby
# File 'lib/pundit/context.rb', line 43

def user
  @user
end
```

--------------------------------

### Access Pundit Context Policy Cache

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Retrieves the policy cache store associated with the Pundit context. This is a private API method.

```ruby
# File 'lib/pundit/context.rb', line 48

def policy_cache
  @policy_cache
end
```

--------------------------------

### policy_scope!

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context

Retrieves the policy scope for the given record, raising an error if it cannot be found. This method ensures a policy scope is always returned or an error is raised.

```APIDOC
## policy_scope!(scope)

### Description
Retrieves the policy scope for the given record, raising an error if it cannot be found. This method ensures a policy scope is always returned or an error is raised.

### Parameters
#### Path Parameters
- **scope** (Object) - The object for which to retrieve the policy scope.

### Returns
- **Scope{#resolve}**: An instance of the scope class which can resolve to a scope.

### Raises
- **NotDefinedError**: If the policy scope cannot be found.
- **InvalidConstructorError**: If the policy constructor is called incorrectly.
```

--------------------------------

### Pundit::NotAuthorizedError#query

Source: https://www.rubydoc.info/gems/pundit/Pundit/NotAuthorizedError%3Aquery

The `query` method returns the object that was being queried when the `NotAuthorizedError` was raised. This is a read-only attribute.

```APIDOC
## Pundit::NotAuthorizedError#query

### Description
Returns the query object associated with the authorization error.

### Method
`query` ⇒ `Object` (readonly)

### Since
v0.2.3

### Example
```ruby
error = Pundit::NotAuthorizedError.new(query: some_object)
puts error.query # Output: some_object
```
```

--------------------------------

### scope

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder

Retrieves the policy scope class. It attempts to find a scope class named `Scope` within the determined policy class. If not found, it returns nil.

```APIDOC
## scope

### Description
Retrieves the policy scope class. It attempts to find a scope class named `Scope` within the determined policy class. If not found, it returns nil.

### Method
`scope`

### Returns
* (`nil`, `Scope{#resolve}`) — scope class which can resolve to a scope

### Examples
```ruby
scope = finder.scope #=> UserPolicy::Scope
scope.resolve #=> <#ActiveRecord::Relation ...>
```
```

--------------------------------

### Accessing the Query Object in NotAuthorizedError

Source: https://www.rubydoc.info/gems/pundit/Pundit/NotAuthorizedError%3Aquery

Use this method to retrieve the query object that caused the `NotAuthorizedError`. This is useful for debugging authorization failures.

```ruby
def query
  @query
end
```

--------------------------------

### Accessing the unauthorized record in Pundit::NotAuthorizedError

Source: https://www.rubydoc.info/gems/pundit/Pundit/NotAuthorizedError%3Arecord

Use the `record` method to retrieve the object that failed authorization. This is useful for logging or providing more context in error messages. Available since v0.2.3.

```ruby
def record
  @record
end
```

--------------------------------

### Pundit::PolicyFinder#scope!

Source: https://www.rubydoc.info/gems/pundit/Pundit/PolicyFinder%3Ascope%21

Returns the scope class which can resolve to a scope. Raises NotDefinedError if the scope cannot be determined.

```APIDOC
## Pundit::PolicyFinder#scope!

### Description
Returns the scope class which can resolve to a scope.

### Method
`scope!`

### Returns
- `Scope{#resolve}` — scope class which can resolve to a scope

### Raises
- `NotDefinedError` — if scope could not be determined

### Since
- v0.1.0

### Source Code
```ruby
def scope!
  scope or raise NotDefinedError, "unable to find scope `#{find(object)}::Scope` for `#{object.inspect}`"
end
```
```

--------------------------------

### Pundit::Context#user

Source: https://www.rubydoc.info/gems/pundit/Pundit/Context%3Auser

Retrieves the user object associated with the Pundit context. This is a read-only attribute.

```APIDOC
## Pundit::Context#user

### Description
Retrieves the user object associated with the Pundit context. This is a read-only attribute.

### Method
GET (Implicit)

### Endpoint
N/A (Instance method)

### Parameters
None

### Request Example
N/A

### Response
#### Success Response (Object)
- **user** (Object) - The user object associated with the context.

### Response Example
```ruby
context.user
```
```