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Testing ActiveRecord Self-Join Compatibility in Ransack

This test suite validates ActiveRecord compatibility in the Ransack gem, specifically focusing on self-joins and includes functionality. It ensures proper handling of association relationships and eager loading behavior in complex database queries.

Test Coverage Overview

The test coverage focuses on validating self-referential associations and eager loading in ActiveRecord models.

Tests self-join functionality with trade accounts
Verifies proper handling of includes with multiple associations
Validates nil association handling
Ensures compatibility with complex join patterns

Implementation Analysis

The testing approach employs RSpec to verify ActiveRecord’s association handling within Ransack’s polyamorous relationships. The implementation uses factory-style object creation and expectation matching to validate association behavior.

Direct ActiveRecord creation calls
Chained query methods testing
Explicit association verification

Technical Details

RSpec testing framework
ActiveRecord ORM
Database transactions for test isolation
Polyamorous module integration
Custom Account model with self-referential associations

Best Practices Demonstrated

The test suite demonstrates several testing best practices for complex ORM relationships.

Isolated test scenarios
Clear setup and expectations
Proper database cleanup
Focused test cases
Explicit association validation

activerecord-hackery/ransack

spec/polyamorous/activerecord_compatibility_spec.rb

            
require 'spec_helper'

module Polyamorous
  describe "ActiveRecord Compatibility" do
    it 'works with self joins and includes' do
      trade_account = Account.create!
      Account.create!(trade_account: trade_account)

      accounts = Account.joins(:trade_account).includes(:trade_account, :agent_account)
      account = accounts.first

      expect(account.agent_account).to be_nil
    end
  end
end