diff options
Diffstat (limited to 'activerecord/lib/active_record/associations.rb')
| -rwxr-xr-x | activerecord/lib/active_record/associations.rb | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index c72024d5f3..0e8a48f2a0 100755 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -608,7 +608,8 @@ module ActiveRecord # include the joined columns. # * <tt>:as</tt>: Specifies a polymorphic interface (See #belongs_to). # * <tt>:through</tt>: Specifies a Join Model to perform the query through. Options for <tt>:class_name</tt> and <tt>:foreign_key</tt> - # are ignored, as the association uses the source reflection. + # are ignored, as the association uses the source reflection. You can only use a <tt>:through</tt> query through a <tt>belongs_to</tt> + # or <tt>has_many</tt> association on the join model. # * <tt>:source</tt>: Specifies the source association name used by <tt>has_many :through</tt> queries. Only use it if the name cannot be # inferred from the association. <tt>has_many :subscribers, :through => :subscriptions</tt> will look for either +:subscribers+ or # +:subscriber+ on +Subscription+, unless a +:source+ is given. |