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author | Gonçalo Silva <goncalossilva@gmail.com> | 2010-07-10 17:36:10 +0100 |
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committer | Gonçalo Silva <goncalossilva@gmail.com> | 2010-07-10 17:36:10 +0100 |
commit | cd2bbed9846d84a1230a1b9e52843eedca17b28d (patch) | |
tree | 5214b7855f3d102e4c22239b9d62bc5717cb3547 /activerecord/lib/active_record/associations.rb | |
parent | d2c633ba0bfb7baacdee89a46d7d036d24c68817 (diff) | |
parent | 80e47d7b88dcc732ebeb5290faab6e529829dac6 (diff) | |
download | rails-cd2bbed9846d84a1230a1b9e52843eedca17b28d.tar.gz rails-cd2bbed9846d84a1230a1b9e52843eedca17b28d.tar.bz2 rails-cd2bbed9846d84a1230a1b9e52843eedca17b28d.zip |
Merge branch 'master' of http://github.com/rails/rails
Diffstat (limited to 'activerecord/lib/active_record/associations.rb')
-rw-r--r-- | activerecord/lib/active_record/associations.rb | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 4caa434fc0..65daa8ffbe 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -763,20 +763,27 @@ module ActiveRecord # An empty array is returned if none are found. # [collection<<(object, ...)] # Adds one or more objects to the collection by setting their foreign keys to the collection's primary key. + # Note that this operation instantly fires update sql without waiting for the save or update call on the + # parent object. # [collection.delete(object, ...)] # Removes one or more objects from the collection by setting their foreign keys to +NULL+. # Objects will be in addition destroyed if they're associated with <tt>:dependent => :destroy</tt>, # and deleted if they're associated with <tt>:dependent => :delete_all</tt>. # [collection=objects] - # Replaces the collections content by deleting and adding objects as appropriate. + # Replaces the collections content by deleting and adding objects as appropriate. If the <tt>:through</tt> + # option is true callbacks in the join models are triggered except destroy callbacks, since deletion is + # direct. # [collection_singular_ids] # Returns an array of the associated objects' ids # [collection_singular_ids=ids] - # Replace the collection with the objects identified by the primary keys in +ids+ + # Replace the collection with the objects identified by the primary keys in +ids+. This + # method loads the models and calls <tt>collection=</tt>. See above. # [collection.clear] # Removes every object from the collection. This destroys the associated objects if they # are associated with <tt>:dependent => :destroy</tt>, deletes them directly from the # database if <tt>:dependent => :delete_all</tt>, otherwise sets their foreign keys to +NULL+. + # If the <tt>:through</tt> option is true no destroy callbacks are invoked on the join models. + # Join models are directly deleted. # [collection.empty?] # Returns +true+ if there are no associated objects. # [collection.size] @@ -869,9 +876,11 @@ module ActiveRecord # [:as] # Specifies a polymorphic interface (See <tt>belongs_to</tt>). # [:through] - # Specifies a Join Model through which to perform the query. Options for <tt>:class_name</tt> and <tt>:foreign_key</tt> + # Specifies a join model through which to perform the query. Options for <tt>:class_name</tt> and <tt>:foreign_key</tt> # are ignored, as the association uses the source reflection. You can only use a <tt>:through</tt> query through a <tt>belongs_to</tt> - # <tt>has_one</tt> or <tt>has_many</tt> association on the join model. + # <tt>has_one</tt> or <tt>has_many</tt> association on the join model. The collection of join models can be managed via the collection + # API. For example, new join models are created for newly associated objects, and if some are gone their rows are deleted (directly, + # no destroy callbacks are triggered). # [:source] # 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 <tt>:subscribers</tt> or @@ -1186,6 +1195,8 @@ module ActiveRecord # [collection<<(object, ...)] # Adds one or more objects to the collection by creating associations in the join table # (<tt>collection.push</tt> and <tt>collection.concat</tt> are aliases to this method). + # Note that this operation instantly fires update sql without waiting for the save or update call on the + # parent object. # [collection.delete(object, ...)] # Removes one or more objects from the collection by removing their associations from the join table. # This does not destroy the objects. |