100 lines
2.7 KiB
Ruby
100 lines
2.7 KiB
Ruby
module ActiveModel
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# == Active \Model \Basic \Model
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#
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# Includes the required interface for an object to interact with
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# <tt>ActionPack</tt>, using different <tt>ActiveModel</tt> modules.
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# It includes model name introspections, conversions, translations and
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# validations. Besides that, it allows you to initialize the object with a
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# hash of attributes, pretty much like <tt>ActiveRecord</tt> does.
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#
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# A minimal implementation could be:
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#
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# class Person
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# include ActiveModel::Model
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# attr_accessor :name, :age
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# end
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#
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# person = Person.new(name: 'bob', age: '18')
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# person.name # => 'bob'
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# person.age # => 18
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#
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# Note that, by default, <tt>ActiveModel::Model</tt> implements <tt>persisted?</tt>
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# to return +false+, which is the most common case. You may want to override
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# it in your class to simulate a different scenario:
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#
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# class Person
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# include ActiveModel::Model
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# attr_accessor :id, :name
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#
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# def persisted?
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# self.id == 1
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# end
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# end
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#
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# person = Person.new(id: 1, name: 'bob')
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# person.persisted? # => true
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#
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# Also, if for some reason you need to run code on <tt>initialize</tt>, make
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# sure you call +super+ if you want the attributes hash initialization to
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# happen.
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#
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# class Person
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# include ActiveModel::Model
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# attr_accessor :id, :name, :omg
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#
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# def initialize(attributes={})
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# super
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# @omg ||= true
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# end
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# end
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#
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# person = Person.new(id: 1, name: 'bob')
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# person.omg # => true
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#
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# For more detailed information on other functionalities available, please
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# refer to the specific modules included in <tt>ActiveModel::Model</tt>
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# (see below).
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module Model
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def self.included(base) #:nodoc:
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base.class_eval do
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extend ActiveModel::Naming
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extend ActiveModel::Translation
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include ActiveModel::Validations
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include ActiveModel::Conversion
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end
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end
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# Initializes a new model with the given +params+.
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#
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# class Person
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# include ActiveModel::Model
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# attr_accessor :name, :age
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# end
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#
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# person = Person.new(name: 'bob', age: '18')
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# person.name # => "bob"
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# person.age # => 18
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def initialize(params={})
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params.each do |attr, value|
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self.public_send("#{attr}=", value)
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end if params
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super()
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end
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# Indicates if the model is persisted. Default is +false+.
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#
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# class Person
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# include ActiveModel::Model
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# attr_accessor :id, :name
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# end
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#
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# person = Person.new(id: 1, name: 'bob')
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# person.persisted? # => false
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def persisted?
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false
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end
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end
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end
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