diff options
Diffstat (limited to 'guides/source/association_basics.md')
| -rw-r--r-- | guides/source/association_basics.md | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md index 3484627a78..d6b2e75e1e 100644 --- a/guides/source/association_basics.md +++ b/guides/source/association_basics.md @@ -833,6 +833,7 @@ The `belongs_to` association supports these options: * `:polymorphic` * `:touch` * `:validate` +* `:optional` ##### `:autosave` @@ -956,6 +957,11 @@ end If you set the `:validate` option to `true`, then associated objects will be validated whenever you save this object. By default, this is `false`: associated objects will not be validated when this object is saved. +##### `:optional` + +If you set the `:optional` option to `true`, then the presence of the associated +object won't be validated. By default, this option is set to `false`. + #### Scopes for `belongs_to` There may be times when you wish to customize the query used by `belongs_to`. Such customizations can be achieved via a scope block. For example: @@ -1986,8 +1992,8 @@ While Rails uses intelligent defaults that will work well in most situations, th ```ruby class Parts < ActiveRecord::Base - has_and_belongs_to_many :assemblies, autosave: true, - readonly: true + has_and_belongs_to_many :assemblies, -> { readonly }, + autosave: true end ``` @@ -1999,7 +2005,6 @@ The `has_and_belongs_to_many` association supports these options: * `:foreign_key` * `:join_table` * `:validate` -* `:readonly` ##### `:association_foreign_key` |