diff options
Diffstat (limited to 'activemodel')
| -rw-r--r-- | activemodel/lib/active_model/attributes.rb | 44 | ||||
| -rw-r--r-- | activemodel/test/cases/attributes_test.rb | 14 |
2 files changed, 58 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/attributes.rb b/activemodel/lib/active_model/attributes.rb index b7b2f35bcc..6048ff0113 100644 --- a/activemodel/lib/active_model/attributes.rb +++ b/activemodel/lib/active_model/attributes.rb @@ -26,6 +26,21 @@ module ActiveModel define_attribute_method(name) end + # Returns an array of attribute names as strings + # + # class Person + # include ActiveModel::Attributes + # + # attribute :name, :string + # attribute :age, :integer + # end + # + # Person.attribute_names + # # => ["name", "age"] + def attribute_names + attribute_types.keys + end + private def define_method_attribute=(name) @@ -65,10 +80,39 @@ module ActiveModel super end + # Returns a hash of all the attributes with their names as keys and the values of the attributes as values. + # + # class Person + # include ActiveModel::Model + # include ActiveModel::Attributes + # + # attribute :name, :string + # attribute :age, :integer + # end + # + # person = Person.new(name: 'Francesco', age: 22) + # person.attributes + # # => {"name"=>"Francesco", "age"=>22} def attributes @attributes.to_hash end + # Returns an array of attribute names as strings + # + # class Person + # include ActiveModel::Attributes + # + # attribute :name, :string + # attribute :age, :integer + # end + # + # person = Person.new + # person.attribute_names + # # => ["name", "age"] + def attribute_names + @attributes.keys + end + private def write_attribute(attr_name, value) diff --git a/activemodel/test/cases/attributes_test.rb b/activemodel/test/cases/attributes_test.rb index 5483fb101d..af0ddcb92f 100644 --- a/activemodel/test/cases/attributes_test.rb +++ b/activemodel/test/cases/attributes_test.rb @@ -67,6 +67,20 @@ module ActiveModel assert_equal expected_attributes, data.attributes end + test "reading attribute names" do + names = [ + "integer_field", + "string_field", + "decimal_field", + "string_with_default", + "date_field", + "boolean_field" + ] + + assert_equal names, ModelForAttributesTest.attribute_names + assert_equal names, ModelForAttributesTest.new.attribute_names + end + test "nonexistent attribute" do assert_raise ActiveModel::UnknownAttributeError do ModelForAttributesTest.new(nonexistent: "nonexistent") |