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 ActiveModel::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[:last_name]  # => ["can't be empty"]
  person.last_name = "Halpert"
  person.save                   # => true (and person is now saved to the remote service)
Methods
E
S
V
Included Modules
Instance Public methods
errors()

Returns the Errors object that holds all information about attribute error messages.

Source: show | on GitHub 

     # File activeresource/lib/active_resource/validations.rb, line 130
130:     def errors
131:       @errors ||= Errors.new(self)
132:     end
save_with_validation(options={})

Validate a resource and save (POST) it to the remote web service. If any local validations fail - the save (POST) will not be attempted.

Source: show | on GitHub 

    # File activeresource/lib/active_resource/validations.rb, line 71
71:     def save_with_validation(options={})
72:       perform_validation = options[:validate] != false
73: 
74:       # clear the remote validations so they don't interfere with the local
75:       # ones. Otherwise we get an endless loop and can never change the
76:       # fields so as to make the resource valid.
77:       @remote_errors = nil
78:       if perform_validation && valid? || !perform_validation
79:         save_without_validation
80:         true
81:       else
82:         false
83:       end
84:     rescue ResourceInvalid => error
85:       # cache the remote errors because every call to <tt>valid?</tt> clears
86:       # all errors. We must keep a copy to add these back after local
87:       # validations.
88:       @remote_errors = error
89:       load_remote_errors(@remote_errors, true)
90:       false
91:     end
valid?()

Checks for errors on an object (i.e., is resource.errors empty?).

Runs all the specified local validations and returns true if no errors were added, otherwise false. Runs local validations (eg those on your Active Resource model), and also any errors returned from the remote system the last time we saved. Remote errors can only be cleared by trying to re-save the resource.

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

Source: show | on GitHub 

     # File activeresource/lib/active_resource/validations.rb, line 123
123:     def valid?
124:       super
125:       load_remote_errors(@remote_errors, true) if defined?(@remote_errors) && @remote_errors.present?
126:       errors.empty?
127:     end