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Adding ActiveModel::Validations documentation
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2 changed files with 56 additions and 2 deletions
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@ -175,4 +175,21 @@ functionality from the following modules:
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end
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{Learn more}[link:classes/ActiveModel/Translation.html]
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* Providing a full Validation stack for your objects...
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class Person
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include ActiveModel::Validations
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attr_accessor :first_name, :last_name
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validates_each :first_name, :last_name do |record, attr, value|
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record.errors.add attr, 'starts with z.' if value.to_s[0] == ?z
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end
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end
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person = Person.new(:first_name => 'zoolander')
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person.valid? #=> false
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{Learn more}[link:classes/ActiveModel/Validations.html]
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@ -3,6 +3,41 @@ require 'active_support/core_ext/hash/keys'
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require 'active_model/errors'
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module ActiveModel
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# Provides a full validation framework to your objects.
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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::Validations
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#
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# attr_accessor :first_name, :last_name
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#
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# validates_each :first_name, :last_name do |record, attr, value|
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# record.errors.add attr, 'starts with z.' if value.to_s[0] == ?z
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# end
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# end
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#
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# Which provides you with the full standard validation stack that you
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# know from ActiveRecord.
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#
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# person = Person.new
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# person.valid?
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# #=> true
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# person.invalid?
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# #=> false
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# person.first_name = 'zoolander'
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# person.valid?
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# #=> false
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# person.invalid?
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# #=> true
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# person.errors
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# #=> #<OrderedHash {:first_name=>["starts with z."]}>
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#
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# Note that ActiveModel::Validations automatically adds an +errors+ method
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# to your instances initialized with a new ActiveModel::Errors object, so
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# there is no need for you to add this manually.
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#
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module Validations
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extend ActiveSupport::Concern
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include ActiveSupport::Callbacks
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@ -18,8 +53,10 @@ module ActiveModel
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# class Person
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# include ActiveModel::Validations
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#
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# attr_accessor :first_name, :last_name
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#
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# validates_each :first_name, :last_name do |record, attr, value|
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# record.errors.add attr, 'starts with z.' if value[0] == ?z
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# record.errors.add attr, 'starts with z.' if value.to_s[0] == ?z
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# end
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# end
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#
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