接收参数但不更新模型的属性

我在这里遇到一个奇怪的问题 - 我要么发送错误的属性，要么我在Rails端做了错误的事情。看起来像JavaScript/jQuery方面的东西比Rails方面做得更多，所以更有可能。接收参数但不更新模型的属性

无论如何，这里是相关的代码段。我的问题在这篇文章的最底部。

在控制器方法

def update 
    @answer = Answer.find(params[:id]) 
    @answer.update_attributes(params[:answer]) 
    puts @answer.inspect 
    respond_to do |format| 
     format.html { render :json => Answer.find(params[:id]) } 
    end 
    end

JavaScript函数（jQuery的加载）

function saveAnswer(question_number, answer_number) 
{ 
    console.log(JSON.stringify(window.questions[question_number].answers[answer_number])); 
    $.ajax(
    { 
     type: 'POST', 
     url: "/answers/" + window.questions[question_number].answers[answer_number].id + "/update", 
     data: JSON.stringify(window.questions[question_number].answers[answer_number]), 
    }); 
}

上述console.log()函数的输出被称为：

{"content":"Latte.ASDASD!!!!  Z","created_at":"2011-08-15T20:01:48Z","graded":true,"id":9,"problem_id":2,"turned_in":true,"updated_at":"2011-08-22T06:42:20Z","user_id":1,"score":5}

的WEBrick接收到该请求：

Started POST "/answers/9/update" for 127.0.0.1 at 2011-08-21 23:44:10 -0700 
    Processing by AnswerController#update as */* 
    Parameters: {"content"=>"Latte.ASDASD!!!! ┬á ┬á ┬á Z", "created_at"=>"2011-08-15T20:01:48Z", "graded"=>"true", "id"=>"9", "problem_id"=>"2", "turned_in"=>"true", "updated_at"=>"2011-08-22T06:42 
:20Z", "user_id"=>"1", "score"=>"5"} 
    ←[1m←[36mAnswer Load (0.0ms)←[0m ←[1mSELECT "answers".* FROM "answers" WHERE "answers"."id" = ? LIMIT 1←[0m [["id", "9"]] 
    ←[1m←[35mCACHE (0.0ms)←[0m SELECT "answers".* FROM "answers" WHERE "answers"."id" = ? LIMIT 1 
Completed 200 OK in 16ms (Views: 4.9ms | ActiveRecord: 0.0ms)

模型的内容：

irb(main):007:0> Answer.inspect 
    => "Answer(id: integer, problem_id: integer, user_id: integer, content: text, created_at: datetime, updated_at: datetime, turned_in: boolean, graded: boolean)"

如何让Rails的更新使用从saveAnswer功能的输入指定Answer模型的属性？

来源

2011-08-22 Display Name

您错过了JSON请求的数据字段中的根元素。应该是这样的：

function saveAnswer(question_number, answer_number) { 
    console.log(window.questions[question_number].answers[answer_number]); 

    $.ajax({ 
    type: 'POST', 
    url: "/answers/" + window.questions[question_number].answers[answer_number].id + "/update", 
    data: { answer: window.questions[question_number].answers[answer_number] } 
    }); 
}

来源

2011-08-22 07:16:52

我不知道需要一个工作的params方法，谢谢。 –

接收参数但不更新模型的属性

回答

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