我正在创建一个带有Rails后端和Backbone前端的基本调查应用，以帮助学习骨干。但是我遇到了一些问题 - 在尝试发布到服务器时，我一直收到400 Bad Request。一如往常，任何帮助都非常感谢！
每次选择后，我都会发送一个POST来创建选择。这是发送的JSON：
{"appuser"=>3, "question"=>3, "answer"=>4, "choice"=>{}}
似乎JSON可能应该是{"appuser"=>3, "question"=>3, "answer"=>4}，但我不完全确定如何从骨干角度调整它。我想我不确定"choice"=>{}正在做什么。
这是ChoiceController.rb：
class ChoicesController < ApplicationController
before_action :set_choice, only: [:show, :edit, :update, :destroy]
skip_before_action :verify_authenticity_token
def index
@question = Question.find(params[:question_id])
end
# POST /choices
# POST /choices.json
def create
@choice = Choice.new(choice_params)
respond_to do |format|
if @choice.save
format.html { redirect_to question_choices_path, notice: 'Choice was successfully created.' }
format.json { redirect_to question_choices_path, status: :created, location: @choice }
else
format.html { render action: 'new' }
format.json { render json: @choice.errors, status: :unprocessable_entity }
end
end
end
# DELETE /choices/1
# DELETE /choices/1.json
def destroy
@choice.destroy
respond_to do |format|
format.html { redirect_to choices_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_choice
@choice = Choice.find(params[:id])
end
def set_question
@question = Question.find(params[:choice][:question_id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def choice_params
params.require(:choice).permit(:appuser_id, :answer_id, :question_id)
end
end
以下是我通过Backbone创建POST的方法：
events:
'click #answer': 'updateQuestion'
'click #back': 'back'
updateQuestion: ->
if @questionNumber < @questionLimit
@questionNumber += 1
$("#container").html(@render().el)
choice = new SurveyMe.Models.Choice
choice.save(
appuser: parseInt(Cookie.get('survey_user_id'))
question: 3
answer: 4
)
else
Backbone.history.navigate("surveys",trigger: true)
来自控制台的网络预览：
ActionController::ParameterMissing in ChoicesController#create
param not found: choice
Extracted source (around line #48):
4647484950
# Never trust parameters from the scary internet, only allow the white list through.
def choice_params
params.require(:choice).permit(:appuser_id, :answer_id, :question_id)
end
end
Rails.root: C:/Users/thammond/Documents/GitHub/Survey.me
Application Trace | Framework Trace | Full Trace
app/controllers/choices_controller.rb:48:in `choice_params'app/controllers/choices_controller.rb:12:in `create'
Request
Parameters:
{"appuser"=>3, "question"=>3, "answer"=>4, "choice"=>{}}
Toggle session dump
Toggle env dump
Response
Headers:
None
接头：
Remote Address:127.0.0.1:3000
Request URL:http://localhost:3000/choices
Request Method:POST
Status Code:400 Bad Request
Request Headersview source
Accept:application/json, text/javascript, */*; q=0.01
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Content-Length:37
Content-Type:application/json
Cookie:request_method=GET; survey_user_id=3; survey_user_token=74e450e78e32c5587e55e38b5811ad31; _survey_me_session=Znd4NTRqR1BnNUVkNWwzTDhQUW1oWmlTSmQrOG81cXVvb21sNXNTK3Y3TDRqSkZTcFNDTzFlVExrckdQaS9mSGl6cUZQRDJSM1E4RzI4cldJUEFYZ1NDVktNRVZaMkVwamRhMXNTVXFjY0Z5MXp5MGhDb2IzOEdRcXhsRy9JbThxZi94ZkVjVFFXTGhpeCtEQU8vZHhmdmk0TS95NlEzVndKamtSZ1M5blQ3NDlJWVVuK0lHMURBeFJVL0xTamNpLS14MzZZb3dZcUZGQWw1SE80SU9IRTlnPT0%3D--062c1d715fd4908f9722954ec037752387499786
Host:localhost:3000
Origin:http://localhost:3000
Referer:http://localhost:3000/surveys/1
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36
X-CSRF-Token:yJTVE9Ce+a6uIfHk7QmXZsRtg4i7kAoFKjGzXs1Ileg=
X-Requested-With:XMLHttpRequest
Request Payloadview source
{appuser:3, question:3, answer:4}
answer: 4
appuser: 3
question: 3
Response Headersview source
Connection:Keep-Alive
Content-Length:16575
Content-Type:text/html; charset=utf-8
Date:Sun, 29 Jun 2014 20:07:59 GMT
Server:WEBrick/1.3.1 (Ruby/2.0.0/2013-05-14)
X-Request-Id:4b501d74-00b8-40ec-8f1b-325930920c66
X-Runtime:0.219012
发布的骨干保存方法：
// Set a hash of model attributes, and sync the model to the server.
// If the server returns an attributes hash that differs, the model's
// state will be `set` again.
save: function(key, val, options) {
var attrs, method, xhr, attributes = this.attributes;
// Handle both `"key", value` and `{key: value}` -style arguments.
if (key == null || typeof key === 'object') {
attrs = key;
options = val;
} else {
(attrs = {})[key] = val;
}
options = _.extend({validate: true}, options);
// If we're not waiting and attributes exist, save acts as
// `set(attr).save(null, opts)` with validation. Otherwise, check if
// the model will be valid when the attributes, if any, are set.
if (attrs && !options.wait) {
if (!this.set(attrs, options)) return false;
} else {
if (!this._validate(attrs, options)) return false;
}
// Set temporary attributes if `{wait: true}`.
if (attrs && options.wait) {
this.attributes = _.extend({}, attributes, attrs);
}
// After a successful server-side save, the client is (optionally)
// updated with the server-side state.
if (options.parse === void 0) options.parse = true;
var model = this;
var success = options.success;
options.success = function(resp) {
// Ensure attributes are restored during synchronous saves.
model.attributes = attributes;
var serverAttrs = model.parse(resp, options);
if (options.wait) serverAttrs = _.extend(attrs || {}, serverAttrs);
if (_.isObject(serverAttrs) && !model.set(serverAttrs, options)) {
return false;
}
if (success) success(model, resp, options);
model.trigger('sync', model, resp, options);
};
wrapError(this, options);
method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update');
if (method === 'patch') options.attrs = attrs;
xhr = this.sync(method, this, options);
// Restore attributes.
if (attrs && options.wait) this.attributes = attributes;
return xhr;
},
答案 0 :(得分：1)
你可以尝试一下，“强制”使用选择键吗？
choice.save(
choice:
appuser: parseInt(Cookie.get('survey_user_id'))
question: 3
answer: 4
)
也许它会起作用......由于参数很强，你的哈希的第四部分无论如何都不会被使用。