diff options
Diffstat (limited to 'activerecord/lib/active_record/associations.rb')
| -rwxr-xr-x | activerecord/lib/active_record/associations.rb | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 7c60ab8fd0..3ad0eeecc7 100755 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -698,11 +698,10 @@ module ActiveRecord # an option, it is guessed using the lexical order of the class names. So a join between Developer and Project # will give the default join table name of "developers_projects" because "D" outranks "P". # - # Any additional fields added to the join table will be placed as attributes when pulling records out through - # has_and_belongs_to_many associations. This is helpful when have information about the association itself - # that you want available on retrieval. Note that any fields in the join table will override matching field names - # in the two joined tables. As a consequence, having an "id" field in the join table usually has the undesirable - # result of clobbering the "id" fields in either of the other two tables. + # Deprecated: Any additional fields added to the join table will be placed as attributes when pulling records out through + # has_and_belongs_to_many associations. Records returned from join tables with additional attributes will be marked as + # ReadOnly (because we can't save changes to the additional attrbutes). It's strongly recommended that you upgrade any + # associations with attributes to a real join model (see introduction). # # Adds the following methods for retrieval and query. # +collection+ is replaced with the symbol passed as the first argument, so @@ -714,7 +713,7 @@ module ActiveRecord # * <tt>collection.push_with_attributes(object, join_attributes)</tt> - adds one to the collection by creating an association in the join table that # also holds the attributes from <tt>join_attributes</tt> (should be a hash with the column names as keys). This can be used to have additional # attributes on the join, which will be injected into the associated objects when they are retrieved through the collection. - # (collection.concat_with_attributes is an alias to this method). + # (collection.concat_with_attributes is an alias to this method). This method is now deprecated. # * <tt>collection.delete(object, ...)</tt> - removes one or more objects from the collection by removing their associations from the join table. # This does not destroy the objects. # * <tt>collection=objects</tt> - replaces the collections content by deleting and adding objects as appropriate. |