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Diffstat (limited to 'railties/guides')
| -rw-r--r-- | railties/guides/source/active_model_basics.textile | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/railties/guides/source/active_model_basics.textile b/railties/guides/source/active_model_basics.textile index 5e41d39447..c76469f62c 100644 --- a/railties/guides/source/active_model_basics.textile +++ b/railties/guides/source/active_model_basics.textile @@ -8,8 +8,33 @@ WARNING. This Guide is based on Rails 3.0. Some of the code shown here will not h3. Introduction -Active Model is a library containing various modules used in developing frameworks that need to interact with the Rails Action Pack library. Active Model provides a known set of interfaces for usage in classes. +Active Model is a library containing various modules used in developing frameworks that need to interact with the Rails Action Pack library. Active Model provides a known set of interfaces for usage in classes. Some of modules are explained below - +h4. AttributeMethods + +AttributeMethods module can add custom prefixes and suffixes on methods of a class. It is used by defining the prefixes and suffixes, which methods on the object will use them. + +<ruby> +class Person + include ActiveModel::AttributeMethods + + attribute_method_prefix 'reset_' + attribute_method_suffix '_highest?' + define_attribute_methods ['age'] + + attr_accessor :age + +private + def reset_attribute(attribute) + send("#{attribute}=", 0) + end + + def attribute_highest?(attribute) + attribute > 100 ? true : false + end + +end +</ruby> h3. Changelog |