在Laravel中使用vue.js时在$ .ajax中获得成功或完成响应的问题 [英] Problems getting success or done response in $.ajax when using vue.js in Laravel

问题描述

我有这种简单的形式，用户只应在文本区域内键入文本.当用户单击javascript内的提交"按钮时，我使用vue和ajax进行了调用，以将该文本插入数据库.

I have this simple form where the user should only type text inside a textarea. When the user clicks on the submit button, inside the javascript, I make a call with vue and ajax to insert that text into the database.

我的问题是，在用户单击提交"之后，我希望清除文本区域，但是将文本保存到数据库中之后，文本仍然存在.它仍然存在.由于我正在使用vue.js和ajax，因此我正在等待此.done(成功)回调函数，以便继续清除表单.

My problem is that, right after the user clicks on submit, I want the textarea to be cleared, but after the text has been saved into the database, the text is still there. It persists. Since I am using vue.js and ajax, there is this .done (success) callback function I am waiting in order to proceed to clear the form.

或者如果文本已保存到数据库中，还有其他清除文本区域的想法吗?

Or is there any other idea to clear the textarea, if the text was saved into the database?

这是我的刀片代码格式:

Here is my blade code of the form:

<div class="row" id="timeline">
    <div class="col-md-4">
        <form action="#" v-on:submit="postStatus">{{-- Name of the method in Vue.js --}}
            <div class="form-group">
                <textarea class="form-control" rows="5" maxlength="140" autofocus placeholder="What are you upto?" required v-model="post" id="textareapost"></textarea>
            </div>
            <input type="submit" value="Post" class="form-control btn btn-info">

            {{ csrf_field() }}

        </form>
    </div>
    <div class="col-md-8">
        Timeline
    </div>
</div>

这是我的控制者:

<?php

namespace App\Http\Controllers;

use App\Post;
use Illuminate\Http\Request;

use App\Http\Requests;

class PostController extends Controller
{
    public function create(Request $request, Post $post)
    {
        //$request->body;
        //Remember, all we really need is the body. Because if create this post through
        //the User model, it'll automatically assign us a user_id

        //validation:
        $this->validate($request,[
            'body'  =>  'required|max:140',
        ]);
        //die('Posted in the controller!: '.$request->body); //$request->get('body');

        //creating the post from the user, from the post that belongs to the user:
        $createdPost = $request->user()->posts()->create([
            'body'  =>  $request->body,
        ]);

        //Now respond with the post that has been created:
        return response()->json($post->with('user')->find($createdPost->id));
    }
}

到目前为止的javascript代码:

And the javascript code so far:

var csrf_token = $('meta[name="csrf-token"]').attr('content');
    /*Event handling within vue*/
    //when we actually submit the form, we want to catch the action
    new Vue({
        el      : '#timeline',
        data    :   {
            post    : '',
            token   : csrf_token,
        },
        methods : {
            postStatus : function (e) {
                e.preventDefault();
                console.log('Posted: '+this.post+ '. Token: '+this.token);
                var request = $.ajax({
                    url         :   '/posts',
                    method      :   "POST",
                    dataType    :   'json',
                    data        :   {
                        'body'  :   this.post,
                        '_token':   this.token,
                    }
                }).done(function (msg) {
                    console.log('Data saved: '+msg);
                    this.post = '';/*Attempting to clear the form*/
                }.bind(this));/*http://stackoverflow.com/a/26479602/1883256*/

                request.done(function( msg ) {
                    console.log('Data saved: '+msg+'. Outside ...');
                    //$( "#log" ).html( msg );
                });

                request.fail(function( jqXHR, textStatus ) {
                    console.log( "Request failed: " + textStatus );
                });
            }
        },
    });

保存文本后，我再也没有获得.done部分的console.log文本，但是却得到了.fail消息，内容为:

After the the text has been saved, I never get the console.log text of the .done part, but I get the .fail message which says:

请求失败:parsererror

Request failed: parsererror

来自控制器的响应正确如下:

And the response from the controller is right the following:

<?php{"id":29,"user_id":1,"body":"Sunday evening post","created_at":"2016-10-09 23:03:11","updated_at":"2016-10-09 23:03:11","user":{"id":1,"firstname":null,"lastname":null,"username":"pathros","email":"[e-mail]","created_at":"2016-10-08 05:33:06","updated_at":"2016-10-08 18:57:19"}}

我注意到响应添加了<?php.也许是Chrome的检查元素工具? 我想念什么? (注意:我正在使用jQuery 3.1.1和Laravel 5.3)

I noticed that the response adds <?php. Is it maybe the Chrome's inspect elements tool? What am I missing? (Note: I am using jQuery 3.1.1 and Laravel 5.3)

推荐答案

您的问题与AJAX上的dataType选项有关.当前，您有dataType: 'json',，这意味着服务器返回JSON时请求成功.

Your issue has to do with the dataType option on the AJAX. You currently have dataType: 'json', which means the request is successful when the server returns a JSON.

如果返回类似return 'ok';的内容，则AJAX将失败.

If you are returning something like return 'ok'; that AJAX will fail.

确保返回的内容如下:

return Response::json(['ok' => 'true']);

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