Class: AssociationScope::Scope::BelongsToReflection

Inherits:
AssociationScope::Scope show all
Defined in:
lib/association_scope/scope/belongs_to_reflection.rb

Instance Attribute Summary

Attributes inherited from AssociationScope::Scope

#association, #model

Instance Method Summary collapse

Methods inherited from AssociationScope::Scope

#initialize, inject_scopes

Constructor Details

This class inherits a constructor from AssociationScope::Scope

Instance Method Details

#apply ⇒ Object 



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# File 'lib/association_scope/scope/belongs_to_reflection.rb', line 6

def apply
  if reflection_details.options[:polymorphic]
    raise PolymorphicAssociationError.new association: association, model: model
  end

  association = @association
  class_name = reflection_details.options[:class_name]&.constantize || association.camelize.constantize
  foreign_key = reflection_details.options[:foreign_key]
  association_name = association.to_s.underscore.to_sym
  own_table_name = class_name.to_s.pluralize.underscore
  table_name = table_name class_name

  model.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    scope association.pluralize, -> do
      if foreign_key.present?
        class_name
          .joins("JOIN #{table_name} ON #{table_name}.#{foreign_key} = #{own_table_name}.id")
      else
        class_name
          .joins(table_name)
      end
        .where(table_name => { association_name =>
          select("#{association_name}_id".to_sym) })
        .distinct
    end
  RUBY
end