CakePHP的AJAX的Json解析错误使用模型时，模型、错误、CakePHP、AJAX

2023-09-10 22:13:49 作者：倚楼醉听雨

我正在开发使用CakePHP 2.5.3.0的应用程序，然后我偶然发现了一个问题，AJAX：

I'm developing an application using CakePHP 2.5.3.0, and then I stumbled upon a problem with AJAX:

我用一个AJAX请求的jQuery来CakePHP的发送用户的登录名和密码，然后CakePHP的应该返回验证JSON响应。现在的问题是：当我用在我的控制器的操作方法模型方法，JSON响应出来的JSON开始前意外字符

I'm using an AJAX request from jQuery to CakePHP to send the user's login and password, and then CakePHP should return a JSON response validated. The problem is: Whenever I'm using a Model method within my action method in the Controller, the JSON response comes out with an unexpected character before the start of the JSON.

下面是看到回应谷歌浏览器时的屏幕截图： http://i.imgur.com/m5x6X4G.png

Here's a screenshot when seeing response on Google Chrome: http://i.imgur.com/m5x6X4G.png

jQuery的AJAX请求code是在这里：

The jQuery AJAX Request Code is here:

        $.ajax({
            url: "/login/signin.json",
            cache: false,
            type: "POST",
            dataType: "json",
            data: {
                email: $("#login-form").find("input[name=email]").val(),
                password: $("#login-form").find("input[name=password]").val()   
            },
            success: function(response) {               
                self.callback.login(response);
            }
        });

这里是的LoginController的登入资讯的方法：

And here is the LoginController's "signin" method:

        public function signin() {
        if(!$this->request->is("ajax"))     
            throw new BadRequestException();

        $this->layout = 'ajax';
        $this->response->disableCache();

        $this->RequestHandler->respondAs("application/json");

        if($this->request->is("post")):             
            $account = $this->Account->validateAccount($this->request->data['email'], Security::hash($this->request->data['password'],"sha1",true));

            if(count($account)>0):
                $account = $account['Account'];
                $message = array(   "success" => true,
                                    "message" => "[]");

                $AccountManager = new AccountSessionManager();
                $AccountManager->setId($account['id_account']);
            else:
                $message = array(   "error" => true,
                                    "message" => "The entered e-mail or password are invalid",
                                    "code" => 2 );
            endif;
        else:
            $message = array(   "error" => true,
                                "message" => "No POST request.",
                                "code" => 1 );
        endif;  

        $this->set("message", $message);
        $this->set("_serialize", array('message'));

        $this->render("ajax");
    }

对于我在上面呈现的Ajax的视图文件是一个简单

The view file for "ajax" which I rendered above is a simple

<?php echo $message ?>

但后来，每当我改变这一行

But then whenever I change this line

$account = $this->Account->validateAccount($this->request->data['email'], Security::hash($this->request->data['password'],"sha1",true));

到

$account = array();

我不明白JSON响应之前那个奇怪的字符。

I don't get that strange character before the json response.

我不知道为什么会这样，但出现这种情况的仅当我使用任何控制器内的模型方法...

I have no clue why this happens, but this happens only when I use any Model methods within the Controller...

顺便说一句，我从JavaScript得到的错误是：

By the way, the error I get from javascript is:

未捕获的SyntaxError：意外的标记

Uncaught SyntaxError: Unexpected token

和意想不到的角色，我说的是小红点在Chrome的JSON之前。

And the unexpected character I'm talking about is the little red dot in Chrome before the json.

CakePHP的AJAX的Json解析错误使用模型时，模型、错误、CakePHP、AJAX

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