### Install Ash Backpex dependency

Source: https://hexdocs.pm/ash_backpex/index.html

Add the library to your mix.exs file.

```elixir
def deps do
  [
    {:ash_backpex, "~> 0.1.12"}
  ]
end
```

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

### BasicSearch.apply/3 Examples

Source: https://hexdocs.pm/ash_backpex/AshBackpex.BasicSearch.html

Usage examples for applying search filters to an Ash query.

```elixir
iex> query = MyApp.Post |> Ash.Query.new()
iex> AshBackpex.BasicSearch.apply(query, %{"search" => "elixir"}, MyPostLive)
#Ash.Query<...>

iex> # No search term - query unchanged
iex> AshBackpex.BasicSearch.apply(query, %{}, MyPostLive)
#Ash.Query<...>
```

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

### Apply filter with module example

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Example usage of applying a filter using a specific module implementation.

```elixir
iex> query = Ash.Query.new(MyResource)
iex> apply_filter_with_module(query, :published, ["true"], AshBackpex.Filters.Boolean, %{})
# Returns query with filter: published == true
```

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

### Resolve function example

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LoadSelectResolver.html

Example usage of the resolve function in an IEx session.

```elixir
iex> fields = [title: %{}, author: %{}, word_count: %{}]
iex> AshBackpex.LoadSelectResolver.resolve(MyApp.Post, fields)
{[:author, :word_count], [:title]}
```

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

### Define a complete LiveResource

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Dsl.html

A full example showing the structure of a LiveResource, including resource settings, field definitions, filters, and item actions.

```elixir
defmodule MyAppWeb.Admin.PostLive do
  use AshBackpex.LiveResource

  backpex do
    resource MyApp.Blog.Post
    layout {MyAppWeb.Layouts, :admin}
    load [:author, :comments]

    singular_name "Blog Post"
    plural_name "Blog Posts"

    init_order %{by: :inserted_at, direction: :desc}
    per_page_default 25
    per_page_options [10, 25, 50, 100]

    panels [
      content: "Content",
      metadata: "Metadata"
    ]

    fields do
      field :title do
        searchable true
        panel :content
      end

      field :content do
        module Backpex.Fields.Textarea
        rows 15
        panel :content
      end

      field :status do
        panel :metadata
      end

      field :published_at do
        format "%B %d, %Y at %H:%M"
        panel :metadata
      end

      field :author do
        display_field :name
        live_resource MyAppWeb.Admin.UserLive
        panel :metadata
      end

      field :view_count do
        only [:show, :index]
      end
    end

    filters do
      # Select filter - auto-derived from atom with one_of constraint
      filter :status

      # Range filter - auto-derived from datetime attribute
      filter :published_at

      # Boolean filter - auto-derived from boolean attribute
      filter :featured

      # Range filter - auto-derived from integer attribute
      filter :view_count

      # MultiSelect filter - auto-derived from {:array, :atom} with one_of
      filter :tags
    end

    item_actions do
      strip_default [:delete]
      action :publish, MyApp.ItemActions.Publish
      action :archive, MyApp.ItemActions.Archive
    end
  end
end
```

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

### Common Field Mapping Use Cases

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.html

Examples for mapping specific types like Rich Text, Money, or overriding default string behavior.

```elixir
config :ash_backpex,
  field_type_mappings: %{
    MyApp.Types.RichText => MyApp.Fields.TiptapEditor
  }
```

```elixir
config :ash_backpex,
  field_type_mappings: %{
    Money.Ecto.Composite.Type => Backpex.Fields.Currency
  }
```

```elixir
config :ash_backpex,
  field_type_mappings: %{
    Ash.Type.String => Backpex.Fields.Textarea
  }
```

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

### Retrieve read action

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Functions to get the read action used for resources, defaulting to the primary read action.

```elixir
@spec backpex_read_action(dsl_or_extended :: module() | map()) ::
  {:ok, atom()} | :error
```

```elixir
@spec backpex_read_action!(dsl_or_extended :: module() | map()) ::
  atom() | no_return()
```

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

### Get a database record

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Retrieves a record by its primary key value. Returns nil if no record is found.

```elixir
@spec get(String.t(), keyword(), map(), module()) :: {:ok, [map()]} | {:error, term()}
```

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

### Retrieve update action

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Gets the update action configured for the resource, defaulting to the primary update action.

```elixir
@spec backpex_update_action(dsl_or_extended :: module() | map()) ::
  {:ok, atom()} | :error
```

```elixir
@spec backpex_update_action!(dsl_or_extended :: module() | map()) ::
  atom() | no_return()
```

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

### Retrieve singular resource name

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Gets the singular display name for the resource used in the admin interface.

```elixir
@spec backpex_singular_name(dsl_or_extended :: module() | map()) ::
  {:ok, String.t()} | :error
```

```elixir
@spec backpex_singular_name!(dsl_or_extended :: module() | map()) ::
  String.t() | no_return()
```

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

### Retrieve plural name

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Functions to get the plural name of the resource for admin display.

```elixir
@spec backpex_plural_name(dsl_or_extended :: module() | map()) ::
  {:ok, String.t()} | :error
```

```elixir
@spec backpex_plural_name!(dsl_or_extended :: module() | map()) ::
  String.t() | no_return()
```

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

### Convert Filter to Ash Expression

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.MultiSelect.html

Examples of converting multi-select filter values into Ash expressions using to_ash_expr/3.

```elixir
iex> MultiSelect.to_ash_expr(:status, ["active", "pending"], %{})
#Ash.Expr<status in ["active", "pending"]>

iex> MultiSelect.to_ash_expr(:status, ["active"], %{})
#Ash.Expr<status in ["active"]>

iex> MultiSelect.to_ash_expr(:status, [], %{})
nil

iex> MultiSelect.to_ash_expr(:status, nil, %{})
nil
```

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

### Convert range filter to Ash expression

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.Range.html

Examples of using to_ash_expr/3 to generate Ash expressions from range filter maps.

```elixir
iex> Range.to_ash_expr(:price, %{"start" => "10", "end" => "100"}, %{})
#Ash.Expr<price >= 10 and price <= 100>

iex> Range.to_ash_expr(:price, %{"start" => "10", "end" => ""}, %{})
#Ash.Expr<price >= 10>

iex> Range.to_ash_expr(:price, %{"start" => "", "end" => "100"}, %{})
#Ash.Expr<price <= 100>

iex> Range.to_ash_expr(:price, %{"start" => "", "end" => ""}, %{})
nil

iex> Range.to_ash_expr(:price, nil, %{})
nil
```

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

### Retrieve backpex_init_order!

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the default initialization order, raising on error.

```elixir
@spec backpex_init_order!(dsl_or_extended :: module() | map()) ::
  ((any() -> any()) | {module(), list()}) | no_return()
```

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

### Retrieve backpex_init_order

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the default initialization order when no other options are provided.

```elixir
@spec backpex_init_order(dsl_or_extended :: module() | map()) ::
  {:ok, (any() -> any()) | {module(), list()}} | :error
```

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

### Retrieve backpex_panels configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the panels for admin create/edit forms as a keyword list.

```elixir
@spec backpex_panels(dsl_or_extended :: module() | map()) :: {:ok, keyword()} | :error
```

```elixir
@spec backpex_panels!(dsl_or_extended :: module() | map()) :: keyword() | no_return()
```

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

### Retrieve backpex_options configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns a map of configured or default DSL options.

```elixir
@spec backpex_options(dsl_or_extended :: module() | map()) :: %{
  required(atom()) => any()
}
```

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

### backpex_create_action!/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the create action to be used when creating resources, raising an error if not found.

```APIDOC
## backpex_create_action!(dsl_or_extended)

### Description
Retrieves the create action to be used when creating resources. Will default to the primary create action.

### Parameters
- **dsl_or_extended** (module() | map()) - Required - The DSL module or extended map.

### Returns
- **atom() | no_return()** - Returns the action name or raises an error.
```

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

### Retrieve backpex_on_mount! configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the list of hooks to attach to the mount lifecycle.

```elixir
@spec backpex_on_mount!(dsl_or_extended :: module() | map()) ::
  (:mod_arg | atom() | [:mod_arg | atom()]) | no_return()
```

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

### backpex_create_action/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the create action to be used when creating resources. Defaults to the primary create action.

```APIDOC
## backpex_create_action(dsl_or_extended)

### Description
Retrieves the create action to be used when creating resources. Will default to the primary create action.

### Parameters
- **dsl_or_extended** (module() | map()) - Required - The DSL module or extended map.

### Returns
- **{:ok, atom()} | :error** - Returns the action name or an error.
```

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

### Retrieve create action

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the create action for the resource, defaulting to the primary create action.

```elixir
@spec backpex_create_action(dsl_or_extended :: module() | map()) ::
  {:ok, atom()} | :error
```

```elixir
@spec backpex_create_action!(dsl_or_extended :: module() | map()) ::
  atom() | no_return()
```

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

### Retrieve backpex_layout!

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the configured liveview layout, raising on error.

```elixir
@spec backpex_layout!(dsl_or_extended :: module() | map()) ::
  ((any() -> any()) | {:module, atom()}) | no_return()
```

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

### Retrieve backpex_layout

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the configured liveview layout.

```elixir
@spec backpex_layout(dsl_or_extended :: module() | map()) ::
  {:ok, (any() -> any()) | {:module, atom()}} | :error
```

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

### Retrieve backpex_per_page_options configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the available page size options.

```elixir
@spec backpex_per_page_options(dsl_or_extended :: module() | map()) ::
  {:ok, [integer()]} | :error
```

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

### Configure AshBackpex.LiveResource

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Use AshBackpex.LiveResource to automatically configure the adapter for an Ash resource.

```elixir
defmodule MyAppWeb.Admin.PostLive do
  use AshBackpex.LiveResource

  backpex do
    resource MyApp.Blog.Post
    layout {MyAppWeb.Layouts, :admin}

    fields do
      field :title
      field :author
    end
  end
end
```

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

### Retrieve backpex_item_actions_strip_default!

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the default Backpex actions to remove from the live resource, raising on error.

```elixir
@spec backpex_item_actions_strip_default!(dsl_or_extended :: module() | map()) ::
  [atom()] | no_return()
```

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

### Retrieve backpex_on_mount

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the list of hooks to attach to the mount lifecycle.

```elixir
@spec backpex_on_mount(dsl_or_extended :: module() | map()) ::
  {:ok, :mod_arg | atom() | [:mod_arg | atom()]} | :error
```

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

### Retrieve backpex_item_actions_options

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns a map containing configured or default values for backpex.item_actions.

```elixir
@spec backpex_item_actions_options(dsl_or_extended :: module() | map()) :: %{
  required(atom()) => any()
}
```

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

### Define Resource Fields, Relationships, and Calculations

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.html

Configure how resources are displayed, including preloading relationships and defining fields for calculations and aggregates.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}
  load [:author, :comments]  # Preload relationships

  fields do
    field :title
    field :author do          # belongs_to relationship
      display_field :name
      live_resource MyAppWeb.Admin.UserLive
    end
    field :word_count         # calculation
    field :comment_count      # aggregate
  end
end
```

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

### Resolve Ash loads and selects

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LoadSelectResolver.html

Demonstrates how to use the resolver to map Backpex field configurations to Ash query requirements.

```elixir
fields = [
  title: %{module: Backpex.Fields.Text},
  author: %{module: Backpex.Fields.BelongsTo},
  word_count: %{module: Backpex.Fields.Number}
]

{loads, selects} = AshBackpex.LoadSelectResolver.resolve(MyApp.Blog.Post, fields)
# loads => [:author, :word_count]
# selects => [:title]
```

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

### Retrieve per-page options

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the list of available page size numbers for the resource.

```elixir
@spec backpex_per_page_options!(dsl_or_extended :: module() | map()) ::
  [integer()] | no_return()
```

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

### Configure admin layout

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Define an admin layout using Backpex components in your Phoenix layout module.

```elixir
# lib/my_app_web/components/layouts.ex
defmodule MyAppWeb.Layouts do
  use MyAppWeb, :html

  import Backpex.HTML.Layout

  attr :flash, :map, required: true
  attr :fluid?, :boolean, default: false
  attr :current_url, :string, required: true
  slot :inner_block, required: true

  def admin(assigns) do
    ~H"""
    <.app_shell fluid={@fluid?}>
      <:topbar>
        <.topbar_branding />
        <.topbar_dropdown>
          <:label>
            <div class="btn btn-square btn-ghost">
              <Backpex.HTML.CoreComponents.icon name="hero-user" class="size-6" />
            </div>
          </:label>
          <li>
            <.link href={~p"/"} class="flex justify-between hover:bg-base-200">
              <p>Back to App</p>
            </.link>
          </li>
        </.topbar_dropdown>
      </:topbar>
      <:sidebar>
        <.sidebar_item current_url={@current_url} navigate={~p"/admin/posts"}>
          <Backpex.HTML.CoreComponents.icon name="hero-document-text" class="size-5" /> Posts
        </.sidebar_item>
        <%!-- Add more sidebar items for your resources --%>
      </:sidebar>
      <.flash_messages flash={@flash} />
      {render_slot(@inner_block)}
    </.app_shell>
    """
  end
end
```

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

### Define a LiveResource

Source: https://hexdocs.pm/ash_backpex/index.html

Create an admin interface by using AshBackpex.LiveResource in a LiveView module.

```elixir
# myapp_web/live/admin/post_live.ex
defmodule MyAppWeb.Live.Admin.PostLive do
    use AshBackpex.LiveResource

    backpex do
      resource MyApp.Blog.Post
      load [:author]
      layout &MyAppWeb.Layouts.admin/1

      fields do
        field :title
        field :published_at

        field :author do
          display_field(:name)
          live_resource(MyAppWeb.Live.Admin.AuthorLive)
        end
      end
    end
end
```

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

### Retrieve backpex_item_actions

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the list of backpex.item_actions DSL entities.

```elixir
@spec backpex_item_actions(dsl_or_extended :: module() | map()) :: [struct()]
```

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

### Set Initial Sorting

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Define the default sorting order for the resource list using init_order.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}
  init_order %{by: :inserted_at, direction: :desc}
end
```

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

### Configure Resource Relationships

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Define relationships and specify the display field and target LiveView resource for navigation.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}
  load [:author]  # Preload the relationship

  fields do
    field :title
    field :author do
      display_field :name
      live_resource MyAppWeb.Admin.UserLive
    end
  end
end
```

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

### Retrieve backpex_per_page_default configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the default page size number.

```elixir
@spec backpex_per_page_default(dsl_or_extended :: module() | map()) ::
  {:ok, integer()} | :error
```

```elixir
@spec backpex_per_page_default!(dsl_or_extended :: module() | map()) ::
  integer() | no_return()
```

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

### Create a Custom Filter Module

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.Filter.html

Implement the AshBackpex.Filters.Filter behavior to define custom query filtering logic.

```elixir
defmodule MyApp.Filters.CustomStatus do
  use Backpex.Filters.Select
  @behaviour AshBackpex.Filters.Filter

  @impl AshBackpex.Filters.Filter
  def to_ash_expr(field, value, _assigns) do
    require Ash.Expr
    Ash.Expr.expr(^Ash.Expr.ref(field) == ^value)
  end
end
```

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

### Retrieve backpex_destroy_action!

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the destroy action for the resource, defaulting to the primary destroy action.

```elixir
@spec backpex_destroy_action!(dsl_or_extended :: module() | map()) ::
  atom() | no_return()
```

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

### backpex_resource!/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the Ash resource connected to the Backpex Live resource, raising an error if not found.

```APIDOC
## backpex_resource!(dsl_or_extended)

### Description
The Ash resource that the Backpex Live resource should be connected to.

### Signature
`backpex_resource!(dsl_or_extended :: module() | map()) :: atom() | no_return()`
```

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

### Retrieve PubSub configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Functions to retrieve the PubSub topic and server configuration.

```elixir
@spec backpex_pubsub(dsl_or_extended :: module() | map()) ::
  {:ok, topic: String.t(), server: atom()} | :error
```

```elixir
@spec backpex_pubsub!(dsl_or_extended :: module() | map()) ::
  [topic: String.t(), server: atom()] | no_return()
```

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

### Check backpex_fluid?

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Determines if the layout fills the entire width.

```elixir
@spec backpex_fluid?(dsl_or_extended :: module() | map()) :: boolean()
```

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

### Add admin routes

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Register the LiveResource in your Phoenix router.

```elixir
# lib/my_app_web/router.ex
scope "/admin", MyAppWeb.Admin do
  pipe_through [:browser]

  live "/posts", PostLive
end
```

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

### Implement Filter Callbacks

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.MultiSelect.html

Required callbacks for defining the prompt text and available options for the filter.

```elixir
@impl Backpex.Filters.MultiSelect
def prompt, do: "Select..."

@impl Backpex.Filters.MultiSelect
def options(_assigns) do
  [
    {"Label 1", "value1"},
    {"Label 2", "value2"}
  ]
end
```

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

### Retrieve backpex_item_actions_strip_default

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the default Backpex actions to remove from the live resource.

```elixir
@spec backpex_item_actions_strip_default(dsl_or_extended :: module() | map()) ::
  {:ok, [atom()]} | :error
```

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

### backpex_resource/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the Ash resource connected to the Backpex Live resource.

```APIDOC
## backpex_resource(dsl_or_extended)

### Description
The Ash resource that the Backpex Live resource should be connected to.

### Signature
`backpex_resource(dsl_or_extended :: module() | map()) :: {:ok, atom()} | :error`
```

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

### Implement a custom Select filter

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.Select.html

Define a custom filter module by using AshBackpex.Filters.Select and implementing the required label, prompt, and options callbacks.

```elixir
defmodule MyApp.Filters.Status do
  use AshBackpex.Filters.Select

  @impl Backpex.Filter
  def label, do: "Status"

  @impl Backpex.Filters.Select
  def prompt, do: "Select status..."

  @impl Backpex.Filters.Select
  def options(_assigns) do
    [
      {"Draft", "draft"},
      {"Published", "published"},
      {"Archived", "archived"}
    ]
  end
end
```

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

### Retrieve Backpex resource

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Fetches the Ash resource associated with the Backpex Live resource.

```elixir
@spec backpex_resource(dsl_or_extended :: module() | map()) :: {:ok, atom()} | :error
```

```elixir
@spec backpex_resource!(dsl_or_extended :: module() | map()) :: atom() | no_return()
```

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

### Configure item actions in LiveResource

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Dsl.html

Use the item_actions block to strip default actions and define custom ones.

```elixir
item_actions do
  # Remove default actions
  strip_default [:delete]

  # Add custom actions
  action :publish, MyApp.ItemActions.Publish
  action :archive, MyApp.ItemActions.Archive
end
```

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

### Enable Searchable Fields

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Configure fields to be searchable within the Backpex resource definition.

```elixir
fields do
  field :title do
    searchable true
  end
  field :content do
    searchable true
    module Backpex.Fields.Textarea
  end
end
```

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

### List items by criteria

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Retrieves a list of items matching the specified criteria and fields.

```elixir
@spec list(keyword(), keyword(), map(), module()) :: {:ok, [map()]} | {:error, term()}
```

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

### Retrieve backpex_fields

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the list of backpex.fields DSL entities.

```elixir
@spec backpex_fields(dsl_or_extended :: module() | map()) :: [struct()]
```

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

### Retrieve create changeset

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the changeset function for creating items, accepting metadata like assigns and target.

```elixir
@spec backpex_create_changeset(dsl_or_extended :: module() | map()) ::
  {:ok, (any(), any(), any() -> any())} | :error
```

```elixir
@spec backpex_create_changeset!(dsl_or_extended :: module() | map()) ::
  (any(), any(), any() -> any()) | no_return()
```

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

### Configure Searchable Fields in LiveResource

Source: https://hexdocs.pm/ash_backpex/AshBackpex.BasicSearch.html

Mark fields as searchable within the backpex configuration block to enable automatic search functionality.

```elixir
defmodule MyAppWeb.Admin.PostLive do
  use AshBackpex.LiveResource

  backpex do
    resource MyApp.Blog.Post
    layout {MyAppWeb.Layouts, :admin}

    fields do
      field :title do
        searchable true
      end
      field :content do
        searchable true
      end
      field :author_name  # Not searchable
    end
  end
end
```

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

### Organize Forms with Panels

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Group fields into distinct panels to improve form layout and organization.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}

  panels [
    content: "Content",
    settings: "Settings"
  ]

  fields do
    field :title do
      panel :content
    end
    field :content do
      panel :content
      module Backpex.Fields.Textarea
    end
    field :published do
      panel :settings
    end
    field :status do
      panel :settings
    end
  end
end
```

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

### Retrieve backpex_filters

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the list of backpex.filters DSL entities.

```elixir
@spec backpex_filters(dsl_or_extended :: module() | map()) :: [struct()]
```

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

### backpex_create_changeset/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the changeset function to use when creating items.

```APIDOC
## backpex_create_changeset(dsl_or_extended)

### Description
Changeset to use when creating items. Additional metadata is passed as a keyword list via the third parameter.

### Parameters
- **dsl_or_extended** (module() | map()) - Required - The DSL module or extended map.

### Returns
- **{:ok, (any(), any(), any() -> any())} | :error** - Returns the changeset function or an error.
```

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

### Create a LiveResource

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Define a LiveResource module to manage your Ash resource within the admin interface.

```elixir
# lib/my_app_web/live/admin/post_live.ex
defmodule MyAppWeb.Admin.PostLive do
  use AshBackpex.LiveResource

  backpex do
    resource MyApp.Blog.Post
    layout {MyAppWeb.Layouts, :admin}

    fields do
      field :title
      field :content do
        module Backpex.Fields.Textarea
      end
      field :published
      field :inserted_at
    end
  end
end
```

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

### Retrieve destroy action

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the destroy action for the resource, defaulting to the primary destroy action.

```elixir
@spec backpex_destroy_action(dsl_or_extended :: module() | map()) ::
  {:ok, atom()} | :error
```

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

### Configure Automatic Loads

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Specify additional relationships, calculations, or aggregates to load automatically.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}
  load [:author, :comments, nested: [:author]]
end
```

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

### backpex_singular_name!/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the singular name for the resource used in the admin interface, raising an error if not found.

```APIDOC
## backpex_singular_name!(dsl_or_extended)

### Description
The singular name for the resource that will appear in the admin. E.g., "Post"

### Signature
`backpex_singular_name!(dsl_or_extended :: module() | map()) :: String.t() | no_return()`
```

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

### Retrieve backpex_full_text_search!

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the name of the generated column used for full text search, raising on error.

```elixir
@spec backpex_full_text_search!(dsl_or_extended :: module() | map()) ::
  atom() | no_return()
```

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

### AshBackpex.BasicSearch.apply/3

Source: https://hexdocs.pm/ash_backpex/AshBackpex.BasicSearch.html

Applies search filters to an Ash query based on searchable fields defined in the provided LiveResource module.

```APIDOC
## apply(query, params, live_resource)

### Description
Applies search filters to an Ash query based on searchable fields. If the params map contains a "search" key, it builds an Ash filter using 'contains' expressions joined by OR logic for all fields marked as searchable in the LiveResource.

### Signature
`apply(query(), params(), live_resource()) :: query()`

### Parameters
- **query** (Ash.Query.t()) - The Ash query to be filtered.
- **params** (map()) - A map containing the search term under the "search" key.
- **live_resource** (module()) - The module that uses AshBackpex.LiveResource.

### Example
```elixir
query = MyApp.Post |> Ash.Query.new()
params = %{"search" => "elixir"}
filtered_query = AshBackpex.BasicSearch.apply(query, params, MyPostLive)
```
```

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

### Customize Resource Display Names

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Override the default singular and plural labels for the resource.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}
  singular_name "Blog Post"
  plural_name "Blog Posts"

  fields do
    # ...
  end
end
```

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

### Implement Custom Changeset Functions

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Provide custom changeset functions for advanced control over create and update operations.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}

  create_changeset fn item, params, metadata ->
    assigns = Keyword.get(metadata, :assigns)
    target = Keyword.get(metadata, :target)

    Ash.Changeset.for_create(item.__struct__, :create, params,
      actor: assigns.current_user
    )
  end
end
```

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

### backpex_update_action!/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the update action configured for the resource, raising an error if not found.

```APIDOC
## backpex_update_action!(dsl_or_extended)

### Description
The update action to be used when updating resources. Will default to the primary update action.

### Signature
`backpex_update_action!(dsl_or_extended :: module() | map()) :: atom() | no_return()`
```

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

### Configure Custom Item Actions

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Modify available item actions by stripping defaults or adding custom action modules.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}

  item_actions do
    strip_default [:delete]  # Remove delete action
    action :archive, MyApp.ItemActions.Archive
  end

  fields do
    # ...
  end
end
```

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

### Configure Custom CRUD Actions

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.html

Specify custom Ash actions for CRUD operations within the backpex block.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}

  create_action :admin_create
  read_action :admin_read
  update_action :admin_update
  destroy_action :soft_delete
end
```

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

### backpex_update_action/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the update action configured for the resource.

```APIDOC
## backpex_update_action(dsl_or_extended)

### Description
The update action to be used when updating resources. Will default to the primary update action.

### Signature
`backpex_update_action(dsl_or_extended :: module() | map()) :: {:ok, atom()} | :error`
```

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

### Add Index Filters

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Implement filters in the index view using specific filter modules.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}

  fields do
    field :title
    field :published
    field :status
  end

  filters do
    filter :published do
      module Backpex.Filters.Boolean
    end
    filter :status do
      module Backpex.Filters.Select
    end
  end
end
```

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

### Retrieve backpex_full_text_search

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns the name of the generated column used for full text search.

```elixir
@spec backpex_full_text_search(dsl_or_extended :: module() | map()) ::
  {:ok, atom()} | :error
```

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

### backpex_update_changeset/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Returns a changeset function for updating items, returning {:ok, function} on success or :error.

```APIDOC
## backpex_update_changeset(dsl_or_extended)

### Description
Returns a changeset function used when updating items. Additional metadata is passed as a keyword list via the third parameter.

### Signature
`backpex_update_changeset(dsl_or_extended :: module() | map()) :: {:ok, (any(), any(), any() -> any())} | :error`

### Parameters
- **dsl_or_extended** (module | map) - The DSL module or extended map configuration.

### Metadata
- **:assigns** - The assigns.
- **:target** - The name of the form target that triggered the changeset call (defaults to nil).
```

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

### field_type_mappings(otp_app \ nil)

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Config.html

Reads the field type mappings configuration, checking app-scoped config first, then falling back to global config.

```APIDOC
## field_type_mappings(otp_app \\ nil)

### Description
Reads the field type mappings configuration. Checks app-scoped config first, then falls back to global config. Returns nil if no configuration is found.

### Parameters
- **otp_app** (atom | nil) - Optional - The OTP application name to check for app-scoped config.

### Returns
- (map | function | nil) - The configured field type mappings or nil.
```

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

### Define BasicSearch Types

Source: https://hexdocs.pm/ash_backpex/AshBackpex.BasicSearch.html

Type definitions for the BasicSearch module.

```elixir
@type live_resource() :: module()
```

```elixir
@type params() :: map()
```

```elixir
@type query() :: Ash.Query.t()
```

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

### backpex_singular_name/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the singular name for the resource used in the admin interface.

```APIDOC
## backpex_singular_name(dsl_or_extended)

### Description
The singular name for the resource that will appear in the admin. E.g., "Post"

### Signature
`backpex_singular_name(dsl_or_extended :: module() | map()) :: {:ok, String.t()} | :error`
```

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

### Introspect LiveResource configuration

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Use these functions to retrieve configuration details like the underlying Ash resource or defined fields for a given LiveResource module.

```elixir
# Get the Ash resource for a LiveResource
AshBackpex.LiveResource.Info.backpex_resource(MyAppWeb.Admin.PostLive)
# => MyApp.Blog.Post

# Get configured fields
AshBackpex.LiveResource.Info.backpex_fields(MyAppWeb.Admin.PostLive)
# => [%AshBackpex.LiveResource.Dsl.Field{attribute: :title, ...}, ...]
```

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

### backpex_destroy_action/1

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.Info.html

Retrieves the destroy action to be used when destroying resources.

```APIDOC
## backpex_destroy_action(dsl_or_extended)

### Description
The destroy action to be used when destroying resources. Will default to the primary destroy action.

### Parameters
- **dsl_or_extended** (module() | map()) - Required - The DSL module or extended map.

### Returns
- **{:ok, atom()} | :error** - Returns the action name or an error.
```

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

### Configure Parent Actions for InlineCRUD

Source: https://hexdocs.pm/ash_backpex/inline-crud.html

Define create and update actions in the parent resource using manage_relationship with type :direct_control to handle nested resource operations.

```elixir
defmodule Demo.Blog.Post do
  use Ash.Resource,
    domain: Demo.Blog,
    data_layer: AshSqlite.DataLayer

  actions do
    create :admin_create do
      # Post attributes and other relationship arguments are omitted here.
      argument :comments, {:array, :map}, allow_nil?: true
      change manage_relationship(:comments, type: :direct_control)
    end

    update :admin_update do
      # Post attributes and other relationship arguments are omitted here.
      require_atomic? false
      argument :comments, {:array, :map}, allow_nil?: true
      change manage_relationship(:comments, type: :direct_control)
    end
  end
end
```

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

### Configure field type mappings

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Config.html

Define field type mappings in config/config.exs, supporting both global and app-specific overrides.

```elixir
config :my_app, AshBackpex,
  field_type_mappings: %{...}
```

```elixir
config :ash_backpex,
  field_type_mappings: %{...}
```

```elixir
# Global config (applies to all apps using AshBackpex)
config :ash_backpex,
  field_type_mappings: %{
    MyApp.Types.Money => Backpex.Fields.Currency
  }

# App-specific config (overrides global for this app)
config :my_app, AshBackpex,
  field_type_mappings: %{
    MyApp.Types.Money => MyApp.Fields.MoneyField
  }
```

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

### Configure typeahead relationship fields

Source: https://hexdocs.pm/ash_backpex/index.html

Enable server-backed search for large belongs_to relationships.

```elixir
field :author do
  display_field :name
  typeahead true
  typeahead_limit 10
  debounce 300
  prompt "Choose an author"
end
```

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

### Define a custom Boolean filter

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.Boolean.html

Implement a custom filter module by using AshBackpex.Filters.Boolean and defining the label.

```elixir
defmodule MyApp.Filters.Published do
  use AshBackpex.Filters.Boolean

  @impl Backpex.Filter
  def label, do: "Published"
end
```

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

### Configure LiveResource with InlineCRUD

Source: https://hexdocs.pm/ash_backpex/inline-crud.html

Integrate InlineCRUD into the LiveResource by specifying the module and defining child fields for the related resource.

```elixir
defmodule DemoWeb.PostLive do
  use AshBackpex.LiveResource

  backpex do
    resource Demo.Blog.Post
    create_action :admin_create
    update_action :admin_update
    load [:author, :comments, :topic_tags, :audience_tags, :word_count, :comment_count]

    panels(
      content: "Content",
      publishing: "Publishing",
      relationships: "Relationships"
    )

    fields do
      field :comments do
        module Backpex.Fields.InlineCRUD
        except [:index]
        live_resource DemoWeb.CommentLive
        panel :relationships

        child_fields do
          field :body, Backpex.Fields.Textarea do
            label "Body"
            rows 3
            class "inline-crud-comment-body"
          end

          field :author do
            label "Author"
            display_field :name
            typeahead true
            typeahead_limit 10
            prompt "Choose an author"
            class "w-56"
          end

          field :sentiment do
            label "Sentiment"
            options Positive: :positive, Neutral: :neutral, Critical: :critical
            class "w-40"
          end

          field :approved do
            label "Approved"
            class "w-28"
          end
        end
      end
    end
  end
end
```

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

### Define field_list type

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LoadSelectResolver.html

Type definition for the field list configuration.

```elixir
@type field_list() :: keyword()
```

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

### Implement the type callback

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.Range.html

Specify the input type for the range filter by implementing the type/0 callback.

```elixir
@impl Backpex.Filters.Range
def type, do: :number
```

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

### Define a LiveResource for an Ash resource

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.html

Use the AshBackpex.LiveResource DSL to define an admin interface for an Ash resource, specifying layout and field configurations.

```elixir
defmodule MyAppWeb.Admin.PostLive do
  use AshBackpex.LiveResource

  backpex do
    resource MyApp.Blog.Post
    layout {MyAppWeb.Layouts, :admin}

    fields do
      field :title
      field :content do
        module Backpex.Fields.Textarea
      end
      field :published
      field :author do
        display_field :name
        live_resource MyAppWeb.Admin.UserLive
      end
    end
  end
end
```

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

### Define Child Resource Actions

Source: https://hexdocs.pm/ash_backpex/inline-crud.html

Ensure the child resource includes the necessary create and update actions to accept the fields submitted by the repeated form.

```elixir
defmodule Demo.Blog.Comment do
  use Ash.Resource,
    domain: Demo.Blog,
    data_layer: AshSqlite.DataLayer

  attributes do
    uuid_primary_key :id

    attribute :body, :string do
      allow_nil? false
      public? true
    end

    attribute :sentiment, :atom do
      allow_nil? false
      default :neutral
      public? true
      constraints one_of: [:positive, :neutral, :critical]
    end

    attribute :approved, :boolean do
      allow_nil? false
      default false
      public? true
    end
  end

  relationships do
    belongs_to :post, Demo.Blog.Post do
      allow_nil? false
    end

    belongs_to :author, Demo.Blog.Author do
      allow_nil? false
    end
  end

  actions do
    defaults [:read, :destroy]

    create :create do
      primary? true
      accept [:body, :sentiment, :approved, :post_id, :author_id]
    end

    update :update do
      primary? true
      accept [:body, :sentiment, :approved, :post_id, :author_id]
    end
  end
end
```

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

### Count items matching criteria

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Returns the count of items based on the provided criteria, fields, assigns, and live resource.

```elixir
@spec count(keyword(), keyword(), map(), module()) ::
  {:ok, [map()]} | {:error, term()}
```

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

### Define select type

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LoadSelectResolver.html

Type definition for select atoms.

```elixir
@type select() :: atom()
```

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

### Define a MultiSelect Filter

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.MultiSelect.html

Implement the MultiSelect filter by defining the label, prompt, and available options.

```elixir
defmodule MyApp.Filters.Tags do
  use AshBackpex.Filters.MultiSelect

  @impl Backpex.Filter
  def label, do: "Tags"

  @impl Backpex.Filters.MultiSelect
  def prompt, do: "Select tags..."

  @impl Backpex.Filters.MultiSelect
  def options(_assigns) do
    [
      {"Bug", "bug"},
      {"Feature", "feature"},
      {"Enhancement", "enhancement"}
    ]
  end
end
```

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

### Apply Search Filters Manually

Source: https://hexdocs.pm/ash_backpex/AshBackpex.BasicSearch.html

Invoke BasicSearch.apply/3 directly to filter an Ash query using search parameters.

```elixir
query = MyApp.Blog.Post |> Ash.Query.new()
params = %{"search" => "hello"}

filtered_query = AshBackpex.BasicSearch.apply(query, params, MyAppWeb.Admin.PostLive)
```

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

### Define Parent Resource Relationship

Source: https://hexdocs.pm/ash_backpex/inline-crud.html

Configure the parent resource to expose a has_many relationship to the child resource.

```elixir
defmodule Demo.Blog.Post do
  use Ash.Resource,
    domain: Demo.Blog,
    data_layer: AshSqlite.DataLayer

  relationships do
    has_many :comments, Demo.Blog.Comment
  end
end
```

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

### Set Custom Sort Order

Source: https://hexdocs.pm/ash_backpex/getting-started.html

Define the default sorting behavior for the resource index view.

```elixir
backpex do
  resource MyApp.Blog.Post
  layout {MyAppWeb.Layouts, :admin}
  init_order %{by: :inserted_at, direction: :desc}

  fields do
    # ...
  end
end
```

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

### Customize filter options

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Filters.Boolean.html

Override the options/1 callback to define custom labels and keys for the boolean checkboxes.

```elixir
@impl Backpex.Filters.Boolean
def options(_assigns) do
  [
    %{label: "Published", key: "true", predicate: nil},
    %{label: "Draft", key: "false", predicate: nil}
  ]
end
```

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

### Configure custom field type mappings

Source: https://hexdocs.pm/ash_backpex/index.html

Map Ash types to Backpex field modules globally or via a function.

```elixir
# config/config.exs

# Global config (applies to all apps using AshBackpex)
config :ash_backpex,
  field_type_mappings: %{
    MyApp.Types.Money => Backpex.Fields.Currency,
    MyApp.Types.RichText => Backpex.Fields.Textarea
  }

# Or use a function for conditional logic
config :ash_backpex,
  field_type_mappings: fn type, constraints ->
    case type do
      MyApp.Types.Money -> Backpex.Fields.Currency
      _ -> nil  # Fall back to default
    end
  end
```

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

### Define Field Mappings via Function

Source: https://hexdocs.pm/ash_backpex/AshBackpex.LiveResource.html

Use a function to implement conditional logic based on type and constraints, returning nil to fall back to default mappings.

```elixir
config :ash_backpex,
  field_type_mappings: fn type, constraints ->
    case {type, constraints} do
      # Map Money type to currency field
      {MyApp.Types.Money, _} ->
        Backpex.Fields.Currency

      # Map strings with max_length > 255 to Textarea
      {Ash.Type.String, constraints} when is_list(constraints) ->
        if Keyword.get(constraints, :max_length, 0) > 255 do
          Backpex.Fields.Textarea
        else
          nil  # Fall back to default
        end

      # Return nil to use default mapping
      _ ->
        nil
    end
  end
```

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

### Configure custom field type mappings

Source: https://hexdocs.pm/ash_backpex/readme.html

Define global or conditional mappings between Ash types and Backpex field modules in your configuration.

```elixir
# config/config.exs

# Global config (applies to all apps using AshBackpex)
config :ash_backpex,
  field_type_mappings: %{
    MyApp.Types.Money => Backpex.Fields.Currency,
    MyApp.Types.RichText => Backpex.Fields.Textarea
  }

# Or use a function for conditional logic
config :ash_backpex,
  field_type_mappings: fn type, constraints ->
    case type do
      MyApp.Types.Money => Backpex.Fields.Currency
      _ -> nil  # Fall back to default
    end
  end
```

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

### apply_filter_with_module/5

Source: https://hexdocs.pm/ash_backpex/AshBackpex.Adapter.html

Applies a filter to an Ash query using a filter module's to_ash_expr/3 callback.

```APIDOC
## apply_filter_with_module(query, field, value, module, assigns)

### Description
Applies a filter to the query using a filter module's `to_ash_expr/3` callback. This helper function is used when filters have an associated module that implements the `AshBackpex.Filters.Filter` behavior.

### Parameters
- **query** (Ash.Query.t()) - Required - The Ash.Query to apply the filter to
- **field** (atom()) - Required - The atom name of the attribute being filtered
- **value** (any()) - Required - The filter value from the UI
- **module** (module()) - Required - The filter module implementing AshBackpex.Filters.Filter
- **assigns** (map()) - Required - The LiveView assigns map

### Returns
- **query** (Ash.Query.t()) - The query with the filter applied, or the unchanged query if the filter module returns nil.

### Example
```elixir
iex> query = Ash.Query.new(MyResource)
iex> apply_filter_with_module(query, :published, ["true"], AshBackpex.Filters.Boolean, %{})
# Returns query with filter: published == true
```
```