diff options
Diffstat (limited to 'railties')
| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index 16cacc9928..f9f7f2d83c 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -1036,18 +1036,24 @@ module ActionView end </ruby> -we can access +field_error_proc+ in views. The generation of the writer instance method can be prevented by setting +:instance_writer+ to +false+ (not any false value, but exactly +false+): +we can access +field_error_proc+ in views. + +The generation of the reader instance method can be prevented by setting +:instance_reader+ to +false+ and the generation of the writer instance method can be prevented by setting +:instance_writer+ to +false+. Generation of both methods can be prevented by setting +:instance_accessor+ to +false+. In all cases, the value must be exactly +false+ and not any false value. <ruby> -module ActiveRecord - class Base - # No pluralize_table_names= instance writer is generated. - cattr_accessor :pluralize_table_names, :instance_writer => false +module A + class B + # No first_name instance reader is generated. + cattr_accessor :first_name, :instance_reader => false + # No last_name= instance writer is generated. + cattr_accessor :last_name, :instance_writer => false + # No surname instance reader or surname= writer is generated. + cattr_accessor :surname, :instance_accessor => false end end </ruby> -A model may find that option useful as a way to prevent mass-assignment from setting the attribute. +A model may find it useful to set +:instance_accessor+ to +false+ as a way to prevent mass-assignment from setting the attribute. NOTE: Defined in +active_support/core_ext/class/attribute_accessors.rb+. |