Module: FedoraLens::AttributeMethods
- Extended by:
- ActiveSupport::Autoload, ActiveSupport::Concern
- Includes:
- ActiveModel::AttributeMethods
- Defined in:
- lib/fedora_lens/core.rb,
lib/fedora_lens/attribute_methods.rb,
lib/fedora_lens/attribute_methods/read.rb,
lib/fedora_lens/attribute_methods/write.rb,
lib/fedora_lens/attribute_methods/declarations.rb
Defined Under Namespace
Modules: ClassMethods, Declarations, Read, Write Classes: AttributeMethodCache
Constant Summary collapse
- AttrNames =
Module.new { def self.set_name_cache(name, value) const_name = "ATTR_#{name}" unless const_defined? const_name const_set const_name, value.dup.freeze end end }
Instance Method Summary collapse
-
#[](attr_name) ⇒ Object
Returns the value of the attribute identified by
attr_name
after it has been typecast (for example, “2004-12-12” in a date column is cast to a date object, like Date.new(2004, 12, 12)). -
#[]=(attr_name, value) ⇒ Object
Updates the attribute identified by
attr_name
with the specifiedvalue
. -
#attribute_names ⇒ Object
Returns an array of names for the attributes available on this object.
-
#attributes ⇒ Object
Returns a hash of all the attributes with their names as keys and the values of the attributes as values.
Instance Method Details
#[](attr_name) ⇒ Object
Returns the value of the attribute identified by attr_name
after it has been typecast (for example, “2004-12-12” in a date column is cast to a date object, like Date.new(2004, 12, 12)). It raises ActiveModel::MissingAttributeError
if the identified attribute is missing.
Alias for the read_attribute
method.
class Person < ActiveRecord::Base
belongs_to :organization
end
person = Person.new(name: 'Francesco', age: '22')
person[:name] # => "Francesco"
person[:age] # => 22
person = Person.select('id').first
person[:name] # => ActiveModel::MissingAttributeError: missing attribute: name
person[:organization_id] # => ActiveModel::MissingAttributeError: missing attribute: organization_id
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# File 'lib/fedora_lens/attribute_methods.rb', line 92 def [](attr_name) read_attribute(attr_name) { |n| missing_attribute(n, caller) } end |
#[]=(attr_name, value) ⇒ Object
Updates the attribute identified by attr_name
with the specified value
. (Alias for the protected write_attribute
method).
class Person
include FedoraLens
end
person = Person.new
person[:age] = '22'
person[:age] # => 22
person[:age] # => Fixnum
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# File 'lib/fedora_lens/attribute_methods.rb', line 107 def []=(attr_name, value) write_attribute(attr_name, value) end |
#attribute_names ⇒ Object
Returns an array of names for the attributes available on this object.
class Person
include FedoraLens
end
person = Person.new
person.attribute_names
# => ["id", "created_at", "updated_at", "name", "age"]
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# File 'lib/fedora_lens/attribute_methods.rb', line 55 def attribute_names @attributes.keys end |
#attributes ⇒ Object
Returns a hash of all the attributes with their names as keys and the values of the attributes as values.
class Person
include FedoraLens
end
person = Person.create(name: 'Francesco', age: 22)
person.attributes
# => {"id"=>3, "created_at"=>Sun, 21 Oct 2012 04:53:04, "updated_at"=>Sun, 21 Oct 2012 04:53:04, "name"=>"Francesco", "age"=>22}
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# File 'lib/fedora_lens/attribute_methods.rb', line 68 def attributes attribute_names.each_with_object({}) { |name, attrs| attrs[name] = read_attribute(name) } end |