In my rails app I have a ajax request to the server, to store some data. This used to work without any problem, but now I get an error:
ActionController::UnknownFormat (ActionController::UnknownFormat):
app/controllers/reservations_controller.rb:45:in `create'
As following is the controller and my javascript file where I declare the datatype do be JSON
class ReservationController < ApplicationController
respond_to :html, :json
def create
...
respond_to do |format|
if @reservation.save
format.html do
redirect_to '/'
end
format.json { render json: @reservation.to_json }
else
render 'new'
end
end # respond_to
end # create
end # ReservationController
function.js
$.ajax({
url: url_link,
dataType: 'json',
type: 'POST',
data: dataToSend
})
The complete error log is:
Completed 406 Not Acceptable in 45ms
ActionController::UnknownFormat (ActionController::UnknownFormat):
app/controllers/bookings_controller.rb:45:in `create'
Rendered /Users/tiagovieira/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.5ms)
Rendered /Users/tiagovieira/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_trace.erb (0.8ms)
Rendered /Users/tiagovieira/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.8ms)
Rendered /Users/tiagovieira/.rvm/gems/ruby-2.0.0-p451/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (9.6ms)
This question is related to
ruby
ajax
ruby-on-rails-4
respond-to
Update the create action as below:
def create
...
respond_to do |format|
if @reservation.save
format.html do
redirect_to '/'
end
format.json { render json: @reservation.to_json }
else
format.html { render 'new'} ## Specify the format in which you are rendering "new" page
format.json { render json: @reservation.errors } ## You might want to specify a json format as well
end
end
end
You are using respond_to method but anot specifying the format in which a new page is rendered. Hence, the error ActionController::UnknownFormat .
This problem happened with me and sovled by just add
respond_to :html, :json
to ApplicationController file
You can Check Devise issues on Github: https://github.com/plataformatec/devise/issues/2667
You can also modify your config/routes.rb file like:
get 'ajax/:action', to: 'ajax#:action', :defaults => { :format => 'json' }
Which will default the format to json. It is working fine for me in Rails 4.
Or if you want to go even further and you are using namespaces, you can cut down the duplicates:
namespace :api, defaults: {format: 'json'} do
#your controller routes here ...
end
with the above everything under /api will be formatted as json by default.
Well I fond this post because I got a similar error. So I added the top line like in your controller respond_to :html, :json
then I got a different error(see below)
The controller-level respond_to' feature has been extracted to theresponders` gem. Add it to your Gemfile to continue using this feature: gem 'responders', '~> 2.0' Consult the Rails upgrade guide for details.
But that had nothing to do with it.
There is another scenario where this issue reproduces (as in my case). When THE CLIENT REQUEST doesn't contain the right extension on the url, the controller can't identify the desired result format.
For example: the controller is set to respond_to :json (as a single option, without a HTML response)- while the client call is set to /reservations instead of /reservations.json.
Bottom line, change the client call to /reservations.json.
Source: Stackoverflow.com