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author | Chris Arcand <chris@chrisarcand.com> | 2016-03-11 11:22:34 -0500 |
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committer | Chris Arcand <chris@chrisarcand.com> | 2016-03-11 16:07:09 -0500 |
commit | 5147ab121d628f29451c654a8c312d5a3f491ffb (patch) | |
tree | 0923d5c06af04349469ff6da9a1259ffb3130fdf /guides/source | |
parent | f8d9c0510742b4f2d440f5223803453aaf0fbab0 (diff) | |
download | rails-5147ab121d628f29451c654a8c312d5a3f491ffb.tar.gz rails-5147ab121d628f29451c654a8c312d5a3f491ffb.tar.bz2 rails-5147ab121d628f29451c654a8c312d5a3f491ffb.zip |
Clarify has_many :dependent option docs [ci skip]
Clarifies the documentation here to mean all options are for when the
relation is destroyed; also now reflects the documentation on this same
option found in the has_one section.
Diffstat (limited to 'guides/source')
-rw-r--r-- | guides/source/association_basics.md | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md index 0ffdf037f7..67fd758fe1 100644 --- a/guides/source/association_basics.md +++ b/guides/source/association_basics.md @@ -932,15 +932,13 @@ side of the association. Counter cache columns are added to the containing model's list of read-only attributes through `attr_readonly`. ##### `:dependent` -If you set the `:dependent` option to: - -* `:destroy`, when the object is destroyed, `destroy` will be called on its -associated objects. -* `:delete_all`, when the object is destroyed, all its associated objects will be -deleted directly from the database without calling their `destroy` method. -* `:nullify`, causes the foreign key to be set to `NULL`. Callbacks are not executed. -* `:restrict_with_exception`, causes an exception to be raised if there is an associated record -* `:restrict_with_error`, causes an error to be added to the owner if there is an associated object +Controls what happens to associated objects when their owner is destroyed: + +* `:destroy` causes the associated objects to also be destroyed. +* `:delete_all` causes the associated objects to be deleted directly from the database (callbacks are not executed). +* `:nullify` causes the foreign keys to be set to `NULL` (callbacks are not executed). +* `:restrict_with_exception` causes an exception to be raised if there are associated records. +* `:restrict_with_error` causes an error to be added to the owner if there are associated objects. WARNING: You should not specify this option on a `belongs_to` association that is connected with a `has_many` association on the other class. Doing so can lead to orphaned records in your database. |