Javascript 返回Jquery ajax数据，但未调用success函数_Javascript_Jquery_Ajax

Javascript 返回Jquery ajax数据，但未调用success函数

javascript jquery ajax

Javascript 返回Jquery ajax数据，但未调用success函数,javascript,jquery,ajax,Javascript,Jquery,Ajax,我有以下ajax： $.ajax({ type: 'POST', url: '/Module/findByType', dataType: 'json', data: { request: 'ajax', type_id: id }, success: function (data) { var i = 0;

我有以下ajax：

   $.ajax({
        type: 'POST',
        url: '/Module/findByType',
        dataType: 'json',
        data: {
            request: 'ajax',
            type_id: id
        },
        success: function (data)
        {
            var i = 0;
        })

这将生成以下输出：

[{"id":"267","Category_id":"1","name":"Adf\u00e6rdsscreening","description":"Denne adf\u00e6rdsscreening tager udgangspunkt i Adam Adf\u00e6rds 5 parametre, og du giver karakter ud\nfra en skala fra 1 til 4, hvor 4 er bedst.","price":"0","mentor":null,"location":null,"start_date":null,"end_date":null,"is_online":"1","status_id":"1","Material_id":null,"duration":"10","is_private":"1","module_type":"9","gives_score":"1","type_name":"Screening","type_color":"bg-Survey","category_name":"Adf\u00e6rd","image_path":"\/site\/resources\/images\/category_icon\/adfard.png","color":"bg-adfard","is_owned":"true"},{"id":"271","Category_id":"4","name":"Samtalescreening","description":"Jo mere du \u00f8ver dig p\u00e5 noget, jo dygtigere bliver du til det. M\u00e5ske har du\r\nf\u00f8r oplevet, at du g\u00f8r store fremskridt i de f\u00f8rste uger, derefter g\u00e5r det\r\nlangsommere og langsommere.\r\nOg til sidst g\u00e5r det helt i st\u00e5, m\u00e5ske endda i lange perioder.","price":"0","mentor":null,"location":null,"start_date":null,"end_date":null,"is_online":"1","status_id":"1","Material_id":null,"duration":"10","is_private":"1","module_type":"9","gives_score":"1","type_name":"Screening","type_color":"bg-Survey","category_name":"Kommunikation","image_path":"\/site\/resources\/images\/category_icon\/kommunication.png","color":"bg-Kommunikation ","is_owned":"true"},{"id":"289","Category_id":"1","name":"Test screening","description":"","price":"0","mentor":null,"location":null,"start_date":null,"end_date":null,"is_online":"1","status_id":"1","Material_id":null,"duration":"10","is_private":"1","module_type":"9","gives_score":"1","type_name":"Screening","type_color":"bg-Survey","category_name":"Adf\u00e6rd","image_path":"\/site\/resources\/images\/category_icon\/adfard.png","color":"bg-adfard","is_owned":"true"},{"id":"292","Category_id":"1","name":"Test 2","description":"","price":"0","mentor":null,"location":null,"start_date":null,"end_date":null,"is_online":"1","status_id":"1","Material_id":null,"duration":"0","is_private":"1","module_type":"9","gives_score":"1","type_name":"Screening","type_color":"bg-Survey","category_name":"Adf\u00e6rd","image_path":"\/site\/resources\/images\/category_icon\/adfard.png","color":"bg-adfard","is_owned":"true"}]

我可以从chrome的开发者工具中看到

但是，从未调用success函数

有人能看出问题出在哪里吗

更新

好吧，事情是这样的：

我的ajax调用有两个方面，具体取决于类型_id，因此下面是我非常复杂的PHP代码：

        public function findByType()
    {

        if ($_SESSION['User']['type'] <= 2) {
            if(isset($_POST['type_id']))
            {
                $organization_modules = $this->getDatabase()->template('
          SELECT Module.*, MT.name as type_name, MT.color as type_color, C.name as category_name, C.image_path as image_path, C.color FROM module Module
           INNER JOIN organization_has_module OHOM
           ON Module.id = OHOM.Module_id JOIN category C ON C.id = Module.category_id INNER JOIN module_type MT on MT.id = Module.module_type
           WHERE OHOM.Organization_id = ' . $_SESSION['User']['org'] . '
           AND Module.module_type = ' . $_POST['type_id'].' AND Module.status_id != 0', MySqlTemplates::RFQ_FM);
                $all_modules = $this->getDatabase()->template('SELECT
    M . *,
    MT.color as type_color,
    MT.name as type_name,
    C.name as category_name,
    C.image_path as image_path,
    C.color
FROM
    module M
        JOIN
    category C ON C.id = M.category_id
        JOIN
    module_type MT ON MT.id = M.module_type
WHERE
    M.module_type = '.$_POST['type_id'].' AND is_private = 0 AND M.status_id != 0', MySqlTemplates::RFQ_FM);
            }
            else
            {
                $organization_modules = $this->getDatabase()->template('
          SELECT Module.*, MT.name as type_name, MT.color as type_color, C.name as category_name, C.image_path as image_path, C.color FROM module Module
           INNER JOIN organization_has_module OHOM
           ON Module.id = OHOM.Module_id JOIN category C ON C.id = Module.category_id INNER JOIN module_type MT on MT.id = Module.module_type
           WHERE OHOM.Organization_id = ' . $_SESSION['User']['org'] . '
           AND Module.module_type = ' . $_POST['type_id'].' AND Module.status_id != 0', MySqlTemplates::RFQ_FM);
                $all_modules = $this->getDatabase()->template('SELECT
    M . *,
    MT.color as type_color,
    MT.name as type_name,
    C.name as category_name,
    C.image_path as image_path,
    C.color
FROM
    module M
        JOIN
    category C ON C.id = M.category_id
        JOIN
    module_type MT ON MT.id = M.module_type
WHERE
    M.module_type = '.$_POST['type_id'].' AND is_private = 0 AND M.status_id != 0', MySqlTemplates::RFQ_FM);

            }
            if($organization_modules)
            {
                if($all_modules == null)
                {
                    $all_modules = array();
                }
                foreach ($organization_modules as $module)
                {
                    $is_owned = false;
                    $module['is_owned'] = 'true';

                    $module['name'] = $module['name'];
                    for ($i = 0, $size = count($all_modules); $i < $size; $i++)
                    {
                        $all_modules[$i]['name'] = $all_modules[$i]['name'];
                        if($all_modules[$i]['id'] == $module['id'])
                        {
                            $is_owned = true;
                            $all_modules[$i]['is_owned'] = 'true';
                        }

                    }
                    if(!$is_owned)
                    {
                        array_push($all_modules, $module);
                    }
                }

            }
            else
            {
                if(isset($_POST['type_id']))
                {

                    $all_modules = $this->getDatabase()->template('SELECT M.*, C.name as category_name, C.image_path as image_path, C.color FROM module M JOIN category C ON C.id = M.category_id JOIN module_type MT ON MT.id = M.module_type WHERE M.module_type = ' . $_POST['type_id'].' AND is_private = 0', MySqlTemplates::RFQ_FM);
                }
                else
                {

                    $all_modules = $this->getDatabase()->template('SELECT M.*, C.name as category_name, C.image_path as image_path, C.color FROM module M JOIN category C ON C.id = M.category_id JOIN module_type MT ON MT.id = M.module_type WHERE M.module_type = ' . $_POST['type_id'].' AND is_private = 0', MySqlTemplates::RFQ_FM);
                }

            }
        } else {
            $all_modules = $this->getDatabase()->template('
            SELECT M.*, C.name as category_name, C.image_path as image_path, C.color, MT.name as type_name, MT.color as type_color FROM module M
            INNER JOIN user_has_module UHOM
            ON M.id = UHOM.Module_id
              JOIN
            category C ON C.id = M.category_id INNER JOIN module_type MT ON M.module_type = MT.id
            WHERE UHOM.user_id = ' . $_SESSION['User']['id'] . ' AND M.category_id = ' . $_POST['category_id'], MySqlTemplates::RFQ_FM);

            for ($i = 0, $size = count($all_modules); $i < $size; $i++)
            {
                $all_modules[$i]['is_owned'] = 'true';
            }
        }

        print json_encode($all_modules);
    }

并且显示了success函数

我怀疑您是否在

success

函数之后使用了

的值。但是，由于请求是异步的，并且同步读取

的值，因此可能无法获得最终值，因为JavaScript在AJAX调用之前执行命令

也许你能做到。您可以使用

console.log（）

，而不是

alert（）

，检查函数是否正在执行。这是正确的方法

我的建议是将使用

值的代码放在AJAX调用之后的函数中，并在AJAX调用的

success

函数中调用该函数。

我猜代码没有问题，您只需提醒/console。将数据记录在成功中，请参见下面的示例

$.ajax({

    type: 'POST',
    url: '/Module/findByType',
    dataType: 'json',
    data: {
        request: 'ajax',
        type_id: id
    },
    success: function (data)
    {
        var i = 0;
        console.log("Value of i:" + i);
        console.log("Result:" + data);
    })

只要试着在ajax代码中使用async:false，默认情况下async为true，下面是它的示例

$.ajax({

你怎么说success函数从来没有被调用过？因为success函数没有任何交互功能，你不能这么说。我认为问题出在你的PHP代码中，而不是JS。你能上传它吗？@PraveenKumar我试图在success函数中发出警告你的服务器端代码可能没有以正确的格式返回数据，但是你可以上传数据看，可能还可以。@ArindamNayak我可以发布我的php代码。他说他试图在成功块中发出警报，但从未发生过。@IdanMagled更新了答案。很抱歉，混淆。从未调用成功函数。因此没有执行任何代码相同的结果没有调用任何内容。我想问题是在php中而不是在JS中。您的JS代码看起来不错。请检查PHP代码

$.ajax({

    type: 'POST',
    url: '/Module/findByType',
    dataType: 'json',
    data: {
        request: 'ajax',
        type_id: id
    },
    success: function (data)
    {
        var i = 0;
        console.log("Value of i:" + i);
        console.log("Result:" + data);
    })

type: 'POST',
url: '/Module/findByType',
dataType: 'json',
async : false,
data: {
    request: 'ajax',
    type_id: id
},
success: function (data)
{
    var i = 0;
    console.log("Value of i:" + i);
    console.log("Result:" + data);
})