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Added documentation to explain what happens if you don't set any valu…

…es for the dependent option on has_many
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1 parent d7c5680 commit 06dbdab143a31fcbbe5b82b25b399dd49a901b21 Rodrigo Flores committed with Apr 12, 2012
Showing with 5 additions and 2 deletions.
  1. +5 −2 activerecord/lib/active_record/associations.rb
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7 activerecord/lib/active_record/associations.rb
@@ -1097,13 +1097,16 @@ module ClassMethods
# 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 @@ def has_one(name, options = {})
# 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

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