### Install dependencies and run tests without Docker

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/CONTRIBUTE.md

Commands to install the bundle for a specific Rails version and run the test suite. Replace '6.1' with any version from the 'gemfiles' directory.

```bash
BUNDLE_GEMFILE=gemfiles/rails_6.1.gemfile bundle install
```

```bash
BUNDLE_GEMFILE=gemfiles/rails_6.1.gemfile bundle exec rake
```

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

### Run tests with Docker

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/CONTRIBUTE.md

Commands to start the Docker container, run the tests, and exit, or to open a bash shell inside the container for more control.

```bash
docker compose up
```

```bash
docker compose run ruby bash
```

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

### Install database_cleaner-active_record in Gemfile

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/README.md

Add the gem to the test group in your Gemfile to use Database Cleaner with ActiveRecord.

```ruby
# Gemfile
group :test do
  gem 'database_cleaner-active_record'
end
```

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

### Configure ActiveRecord database adapter with #db

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/README.md

Shows how to set the database for the ActiveRecord adapter, including using the default, switching back to default, and specifying multiple databases.

```ruby
# ActiveRecord connection key
DatabaseCleaner[:active_record].db = :logs

# Back to default:
DatabaseCleaner[:active_record].db = :default

# Multiple databases can be specified:
DatabaseCleaner[:active_record, db: :default]
DatabaseCleaner[:active_record, db: :logs]
```

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

### Configure truncation and deletion strategies with :only and :except

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/README.md

Shows how to set the truncation strategy to only affect the 'users' table and the deletion strategy to affect all tables except 'users'.

```ruby
# Only truncate the "users" table.
DatabaseCleaner[:active_record].strategy = DatabaseCleaner::ActiveRecord::Truncation.new(only: ["users"])

# Delete all tables except the "users" table.
DatabaseCleaner[:active_record].strategy = DatabaseCleaner::ActiveRecord::Deletion.new(except: ["users"])
```

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

### Add client_min_messages to database.yml for Postgres

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/README.md

Alternative to postgresql.conf: add the client_min_messages parameter to the test environment in database.yml to silence truncate cascade notices.

```yaml
test:
  adapter: postgresql
```

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

### Add upstream remote

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/CONTRIBUTE.md

Adds the main repository as an upstream remote to your local clone, allowing you to fetch changes from the original project.

```bash
git remote add upstream git@github.com:DatabaseCleaner/database_cleaner-active_record.git
```

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

### Silence Postgres truncate cascade notices in postgresql.conf

Source: https://github.com/databasecleaner/database_cleaner-active_record/blob/main/README.md

Set client_min_messages to warning in postgresql.conf to suppress 'NOTICE truncate cascades' messages on STDERR when using truncation with foreign key constraints.

```plaintext
client_min_messages = warning
```

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