ruby ActionController::UnknownFormat
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ActionController::UnknownFormat
提问by tvieira
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:
在我的 rails 应用程序中，我向服务器发送了一个 ajax 请求，以存储一些数据。这曾经可以正常工作，但现在出现错误：
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
以下是控制器和我的 javascript 文件，我在其中声明数据类型确实是 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
函数.js
$.ajax({
url: url_link,
dataType: 'json',
type: 'POST',
data: dataToSend
})
The complete error log is:
完整的错误日志是：
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)
回答by Kirti Thorat
Update the createaction as below:
更新create操作如下：
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_tomethod but anot specifying the formatin which a newpage is rendered. Hence, the error ActionController::UnknownFormat.
您正在使用respond_to的方法，但ANOT指定格式，其中new呈现页面。因此，错误ActionController::UnknownFormat。
回答by BPH
You can also modify your config/routes.rb file like:
您还可以修改您的 config/routes.rb 文件，例如：
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.
这将默认格式为json。它在 Rails 4 中对我来说很好用。
Or if you want to go even further and you are using namespaces, you can cut down the duplicates:
或者，如果您想更进一步并且正在使用名称空间，则可以减少重复项：
namespace :api, defaults: {format: 'json'} do
#your controller routes here ...
end
with the above everything under /apiwill be formatted as json by default.
上面的所有内容/api默认都将被格式化为json。
回答by Abdallah Okasha
This problem happened with me and sovled by just add
这个问题发生在我身上，只需添加即可解决
respond_to :html, :json
to ApplicationController file
到 ApplicationController 文件
You can Check Devise issues on Github: https://github.com/plataformatec/devise/issues/2667
你可以在 Github 上查看设计问题：https: //github.com/plataformatec/devise/issues/2667
回答by orberkov
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.
还有另一种情况会重现此问题（如我的情况）。当客户端请求在 url 上不包含正确的扩展名时，控制器无法识别所需的结果格式。
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 /reservationsinstead of /reservations.json.
例如：控制器设置为respond_to :json（作为单个选项，没有 HTML 响应）- 而客户端调用设置为/reservations而不是/reservations.json。
Bottom line, change the client call to /reservations.json.
最重要的是，将客户端调用更改为/reservations.json.
回答by Douglas G. Allen
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
好吧，我喜欢这篇文章，因为我遇到了类似的错误。所以我在你的控制器 respond_to :html, :json 中添加了第一行
then I got a different error(see below)
然后我得到了一个不同的错误（见下文）
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.
控制器级respond_to' feature has been extracted to the响应者的 gem。将它添加到您的 Gemfile 以继续使用此功能： gem 'responders', '~> 2.0' 有关详细信息，请参阅 Rails 升级指南。但这与它无关。
