Module to support validation and errors with Active Resource objects. The module overrides Base#save to rescue ActiveResource::ResourceInvalid exceptions and parse the errors returned in the web service response. The module also adds an errors collection that mimics the interface of the errors provided by ActiveRecord::Errors.
Example
Consider a Person resource on the server requiring both a first_name and a last_name with a validates_presence_of :first_name, :last_name declaration in the model:
person = Person.new(:first_name => "Jim", :last_name => "") person.save # => false (server returns an HTTP 422 status code and errors) person.valid? # => false person.errors.empty? # => false person.errors.count # => 1 person.errors.full_messages # => ["Last name can't be empty"] person.errors.on(:last_name) # => "can't be empty" person.last_name = "Halpert" person.save # => true (and person is now saved to the remote service)
Returns the Errors object that holds all information about attribute error messages.
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# File activeresource/lib/active_resource/validations.rb, line 286 286: def errors 287: @errors ||= Errors.new(self) 288: end
Validate a resource and save (POST) it to the remote web service.
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# File activeresource/lib/active_resource/validations.rb, line 258 258: def save_with_validation 259: save_without_validation 260: true 261: rescue ResourceInvalid => error 262: case self.class.format 263: when ActiveResource::Formats[:xml] 264: errors.from_xml(error.response.body) 265: when ActiveResource::Formats[:json] 266: errors.from_json(error.response.body) 267: end 268: false 269: end
Checks for errors on an object (i.e., is resource.errors empty?).
Examples
my_person = Person.create(params[:person]) my_person.valid? # => true my_person.errors.add('login', 'can not be empty') if my_person.login == '' my_person.valid? # => false
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# File activeresource/lib/active_resource/validations.rb, line 281 281: def valid? 282: errors.empty? 283: end