Class: ActiveRecord::Associations::HasManyThroughAssociation

Inherits:
HasManyAssociation show all
Includes:
ThroughAssociation
Defined in:
activerecord/lib/active_record/associations/has_many_through_association.rb

Overview

:nodoc:

Instance Attribute Summary

Attributes inherited from AssociationProxy

#target

Instance Method Summary (collapse)

Methods inherited from AssociationCollection

#<<, #any?, #build, #clear, #count, #create, #create!, #delete, #delete_all, #destroy_all, #empty?, #find, #first, #include?, #last, #length, #many?, #method_missing, #replace, #reset, #respond_to?, #select, #sum, #to_ary, #transaction, #uniq

Methods inherited from AssociationProxy

#===, #aliased_table_name, #initialize, #inspect, #loaded!, #loaded?, #method_missing, #proxy_owner, #proxy_reflection, #reload, #reset, #respond_to?, #scoped, #send, #stale_target?, #to_param

Constructor Details

This class inherits a constructor from ActiveRecord::Associations::AssociationProxy

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class ActiveRecord::Associations::AssociationCollection

Instance Method Details

- (Object) destroy(*records) 



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# File 'activerecord/lib/active_record/associations/has_many_through_association.rb', line 11

def destroy(*records)
  transaction do
    delete_records(records.flatten)
    super
  end
end

- (Object) size

Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn't been loaded and calling collection.size if it has. If it's more likely than not that the collection does have a size larger than zero, and you need to fetch that collection afterwards, it'll take one fewer SELECT query if you use #length.



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# File 'activerecord/lib/active_record/associations/has_many_through_association.rb', line 22

def size
  if has_cached_counter?
    @owner.send(:read_attribute, cached_counter_attribute_name)
  elsif loaded?
    @target.size
  else
    count
  end
end