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JSON-encoded error and redirect results for Devise controllers
# JSON-encoded error and redirect results for Devise controllers.
# This overrides an internal method of Devise, so be careful when updating Devise!
#
# Usage:
#
# class Users::RegistrationsController < Devise::RegistrationsController
# include DeviseJsonAdapter
# end
#
# devise_for :users, :controllers => { :registrations => "users/registrations" }
module DeviseJsonAdapter
protected
# Handle JSON registration errors.
#
def render_with_scope(action, options={})
respond_to do |format|
format.html { super }
format.json do
if resource.errors
render_json_errors(resource, resource_name)
end
end
end
end
# Since XMLHttpRequest can't see redirects, we replace redirects with a JSON
# response of {redirect: url}.
#
def redirect_to(*args)
respond_to do |format|
format.html { super }
format.json do
render :json => {:redirect => stored_location_for(resource_name) || after_sign_in_path_for(resource)}
end
end
end
# Convert ActiveModel errors into JSON so they can be rendered client-side.
# Result is {errors: {'name': 'message', ...}} which is suitable for passing to
# jQuery.validate's formErrors method.
#
def render_json_errors(model, model_name = nil)
model_name ||= model.class.name.underscore
# Map the error keys into standard HTML element names (e.g., :password -> 'user[password]')
form_errors = Hash[model.errors.collect { |attr, msg| ["#{model_name}[#{attr}]", msg] }]
render :status => :unprocessable_entity, :json => {:errors => form_errors}
end
end
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