Rails ActionController :: UnknownFormat error with response_to
I am getting this error when trying to use ajax. I did some searching but was unable to solve my problem.
ActionController::UnknownFormat
Draft controller:
def index
if params["format"] != nil
@draft = Draft.find_by(id: params["format"].to_i)
respond_to do |format|
format.js
end
end
@draft = current_user.drafts.build
@drafts = current_user.drafts.non_submitted
@being_edited_drafts = current_user.drafts.being_edited
@completed_drafts = current_user.drafts.completed
end
index.js.erb
$('.draft_<%= @draft.id %>').trigger('click');
Magazine:
Started GET "/drafts.132" for 127.0.0.1 at 2014-11-26 11:56:28 -0800
Processing by DraftsController#index as
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = 4 ORDER BY "users"."id" ASC LIMIT 1
Draft Load (0.4ms) SELECT "drafts".* FROM "drafts" WHERE "drafts"."id" = 132 LIMIT 1
Completed 406 Not Acceptable in 5ms
ActionController::UnknownFormat - ActionController::UnknownFormat:
actionpack (4.1.7) lib/action_controller/metal/mime_responds.rb:440:in `retrieve_collector_from_mimes'
actionpack (4.1.7) lib/action_controller/metal/mime_responds.rb:256:in `respond_to'
app/controllers/drafts_controller.rb:16:in `index'
actionpack (4.1.7) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.1.7) lib/abstract_controller/base.rb:189:in `process_action'
actionpack (4.1.7) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.1.7) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.1.7) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.7) lib/active_support/callbacks.rb:166:in `block in halting'
activesupport (4.1.7) lib/active_support/callbacks.rb:166:in `block in halting'
activesupport (4.1.7) lib/active_support/callbacks.rb:229:in `block in halting'
activesupport (4.1.7) lib/active_support/callbacks.rb:215:in `block in halting_and_conditional'
activesupport (4.1.7) lib/active_support/callbacks.rb:166:in `block in halting'
activesupport (4.1.7) lib/active_support/callbacks.rb:166:in `block in halting'
Create method. This loads the index with parameters ["format"]
def create
@draft = Draft.create(draft_params)
if @draft.save
redirect_to drafts_path(@draft.id),notice: "Draft was successfully saved"
else
render action: 'new'
end
end
Form where the create method is called
= form_for @draft, :html => { :multipart => true } do |f|
= f.hidden_field :user_id, value: current_user.id
#new-post-title
= f.text_field :title, :value => "<h1><b>Title</b></h2>"
#new-post-body
= f.text_area :body, :value => "<p>Start writing</p>"
.text-center
= f.submit "New Draft", :class => "btn btn-sm btn-primary btn-round"
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First, you still specify instance variables after your implicit call render
(in a block respond_to
). These instance variable declarations must go above any rendering.
Also, I've seen this happen in some browsers. You can get around it by declaring a dummy render block for the type html
, so something like:
respond_to do |format|
format.html { render(:text => "not implemented") }
format.js
end
The format block html
will most likely never be called, but its declaration nonetheless.
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You need to add remote: true
to the form helper as you are trying to submit the form using ajax.
= form_for @draft, :html => { :multipart => true }, remote: true do |f|
= f.hidden_field :user_id, value: current_user.id
#new-post-title
= f.text_field :title, :value => "<h1><b>Title</b></h2>"
#new-post-body
= f.text_area :body, :value => "<p>Start writing</p>"
.text-center
= f.submit "New Draft", :class => "btn btn-sm btn-primary btn-round"
source to share
This issue happened to me and referred to just add
respond_to :html, :json
to your application_controller.rb file
You can check development issues on Github: https://github.com/plataformatec/devise/issues/2667
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