Class: ActiveRecord::Associations::AssociationScope
- Defined in:
- activerecord/lib/active_record/associations/association_scope.rb
Overview
:nodoc:
Defined Under Namespace
Classes: ReflectionProxy
Constant Summary collapse
- INSTANCE =
create
Class Method Summary collapse
Instance Method Summary collapse
-
#initialize(value_transformation) ⇒ AssociationScope
constructor
A new instance of AssociationScope.
- #scope(association) ⇒ Object
Constructor Details
#initialize(value_transformation) ⇒ AssociationScope
Returns a new instance of AssociationScope.
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# File 'activerecord/lib/active_record/associations/association_scope.rb', line 15 def initialize(value_transformation) @value_transformation = value_transformation end |
Class Method Details
.create(&block) ⇒ Object
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# File 'activerecord/lib/active_record/associations/association_scope.rb', line 10 def self.create(&block) block ||= lambda { |val| val } new(block) end |
.get_bind_values(owner, chain) ⇒ Object
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# File 'activerecord/lib/active_record/associations/association_scope.rb', line 34 def self.get_bind_values(owner, chain) binds = [] last_reflection = chain.last binds << last_reflection.join_id_for(owner) if last_reflection.type binds << owner.class.polymorphic_name end chain.each_cons(2).each do |reflection, next_reflection| if reflection.type binds << next_reflection.klass.polymorphic_name end end binds end |
Instance Method Details
#scope(association) ⇒ Object
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# File 'activerecord/lib/active_record/associations/association_scope.rb', line 21 def scope(association) klass = association.klass reflection = association.reflection scope = klass.unscoped owner = association.owner chain = get_chain(reflection, association, scope.alias_tracker) scope.extending! reflection.extensions scope = add_constraints(scope, owner, chain) scope.limit!(1) unless reflection.collection? scope end |