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| author | Rodrigo Flores <rodrigo.flores@plataformatec.com.br> | 2012-04-12 21:51:35 -0300 |
|---|---|---|
| committer | Rodrigo Flores <rodrigo.flores@plataformatec.com.br> | 2012-04-12 21:51:35 -0300 |
| commit | 820a677d8622a540188704941a31871ed4d61461 (patch) | |
| tree | 58b95f237f0b4040eb266b8da61885f0fb306f02 /activerecord | |
| parent | b744199cc23a40b48c78e2b4353250da8fb55450 (diff) | |
| download | rails-820a677d8622a540188704941a31871ed4d61461.tar.gz rails-820a677d8622a540188704941a31871ed4d61461.tar.bz2 rails-820a677d8622a540188704941a31871ed4d61461.zip | |
Added documentation to explain what happens if you don't set any values for the dependent option on has_many
Diffstat (limited to 'activerecord')
| -rw-r--r-- | activerecord/lib/active_record/associations.rb | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index b901f06ca4..a4753ad8ac 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -1097,13 +1097,16 @@ module ActiveRecord # alongside this object by calling their +destroy+ method. If set to <tt>:delete_all</tt> all associated # objects are deleted *without* calling their +destroy+ method. If set to <tt>:nullify</tt> all associated # objects' foreign keys are set to +NULL+ *without* calling their +save+ callbacks. If set to - # <tt>:restrict</tt> an error will be added to the object, preventing its deletion, if any associated + # <tt>:restrict</tt> an error will be added to the object, preventing its deletion, if any associated # objects are present. # # If using with the <tt>:through</tt> option, the association on the join model must be # a +belongs_to+, and the records which get deleted are the join records, rather than # the associated records. # + # If you don't set any values, all associated objects remain untouched and with an invalid + # foreign key. + # # [:finder_sql] # Specify a complete SQL statement to fetch the association. This is a good way to go for complex # associations that depend on multiple tables. May be supplied as a string or a proc where interpolation is @@ -1382,7 +1385,7 @@ module ActiveRecord # and +decrement_counter+. The counter cache is incremented when an object of this # class is created and decremented when it's destroyed. This requires that a column # named <tt>#{table_name}_count</tt> (such as +comments_count+ for a belonging Comment class) - # is used on the associate class (such as a Post class) - that is the migration for + # is used on the associate class (such as a Post class) - that is the migration for # <tt>#{table_name}_count</tt> is created on the associate class (such that Post.comments_count will # return the count cached, see note below). You can also specify a custom counter # cache column by providing a column name instead of a +true+/+false+ value to this |