Module: Polyamorous::JoinDependencyExtensions

Defined in:
lib/polyamorous/activerecord/join_dependency.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#build(associations, base_klass) ⇒ Object

Replaces ActiveRecord::Associations::JoinDependency#build



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# File 'lib/polyamorous/activerecord/join_dependency.rb', line 4

def build(associations, base_klass)
  associations.map do |name, right|
    if name.is_a? Join
      reflection = find_reflection base_klass, name.name
      reflection.check_validity!
      reflection.check_eager_loadable!

      klass = if reflection.polymorphic?
        name.klass || base_klass
      else
        reflection.klass
      end
      JoinAssociation.new(reflection, build(right, klass), name.klass, name.type)
    else
      reflection = find_reflection base_klass, name
      reflection.check_validity!
      reflection.check_eager_loadable!

      if reflection.polymorphic?
        raise ActiveRecord::EagerLoadPolymorphicError.new(reflection)
      end
      JoinAssociation.new(reflection, build(right, reflection.klass))
    end
  end
end

#construct_tables_for_association!(join_root, association) ⇒ Object 



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# File 'lib/polyamorous/activerecord/join_dependency.rb', line 50

def construct_tables_for_association!(join_root, association)
  tables = table_aliases_for(join_root, association)
  association.table = tables.first
  tables
end

#join_constraints(joins_to_add, alias_tracker, references) ⇒ Object 



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# File 'lib/polyamorous/activerecord/join_dependency.rb', line 30

def join_constraints(joins_to_add, alias_tracker, references)
  @alias_tracker = alias_tracker
  @joined_tables = {}
  @references = {}

  references.each do |table_name|
    @references[table_name.to_sym] = table_name if table_name.is_a?(String)
  end

  joins = make_join_constraints(join_root, join_type)

  joins.concat joins_to_add.flat_map { |oj|
    if join_root.match?(oj.join_root) && join_root.table.name == oj.join_root.table.name
      walk join_root, oj.join_root, oj.join_type
    else
      make_join_constraints(oj.join_root, oj.join_type)
    end
  }
end