如何在cassandra中编写子查询/嵌套查询.这个工具是用CQL提供的吗?
我试过的例子:
cqlsh:testdb> select itemname from item where itemid = (select itemid from orders where customerid=1);
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它只是抛出以下错误 -
Bad Request: line 1:87 no viable alternative at input ';'
Run Code Online (Sandbox Code Playgroud) 我需要检查Cassandra数据库中是否存在某些键空间.我需要写这样的smth:
if (keyspace KEYSPACE_NAME not exists) create keyspace KEYSPACE_NAME;
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有一个命令描述键空间,但我能以某种方式从cql脚本中检索它的信息吗?
我在JQuery中有一个问题.$.ajax()我在我的代码中(Function 1)使用将字段名和序列号发送到ctrller,它通过$_POST['name']和获取数据$_POST['sequenceno']并更新表中的字段名,序列号为no..And生成预览显示面板插入字段..现在我正在尝试再次更改字段名称现在,当我点击生成的显示面板字段时,相应的设置将打开,我将尝试更改字段的名称(Function 2)
无论Function1和Function2相同..In了Function1我送的字段名和顺序没有
在Funciton 2中,我想发送相同的fieldname和(但是另一个值)sequenceno ..
但是在Function1中(sequenceno是计数器值)而在Function2中(sequenceno是单击的div id(显示面板))
我怎样才能为两者使用相同的函数..或者我可以使用单独的函数..
即使我尝试使用2个不同的功能,但没有正确更新
我的代码是
//This is what i insert the field initially
$(".TextFieldSettings #fieldTitle").change(function (){
fieldname=$(".TextFieldSettings #fieldTitle").val();
$.ajax({
type: "POST",
url: "./server",
data: "name="+fieldname+"&sequenceno="+counter,
success: function(msg){
}//success
});//ajax
});//change
//After inserting to get the updated values in JSON format
var htm = $.ajax({
type: "GET",
url: "./viewforms",
async: false
}).responseText;
var myObject = eval('(' + htm + …Run Code Online (Sandbox Code Playgroud) 为什么jQuery脚本在我的jsfiddle中工作但不在我的页面中?
我做了什么:尝试了不同版本的JQuery ......制作了脚本
所以我有这个测试页面:
<!-- Scripts -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"></script>
<style>
select #canselect_code {
width:200px;
height:200px;
}
.fr {
float:right;
}
.fl {
float:left;
}
</style>
<script>
$(document).ready(function(){
$('[id^=\"btnRight\"]').click(function (e) {
$(this).prev('select').find('option:selected').remove().appendTo('#isselect_code');
});
$('[id^=\"btnLeft\"]').click(function (e) {
$(this).next('select').find('option:selected').remove().appendTo('#canselect_code');
});
});
</script>
</head>
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<div>
<select id='canselect_code' name='canselect_code' multiple class='fl'>
<option value='1'>toto</option>
<option value='2'>titi</option>
</select>
<input type='button' id='btnRight_code' value=' > ' />
<br>
<input type='button' id='btnLeft_code' value=' < ' />
<select id='isselect_code' name='isselect_code' multiple class='fr'>
<option value='3'>tata</option>
<option value='4'>tutu</option>
</select> …Run Code Online (Sandbox Code Playgroud) 如何在谷歌地图中删除信息窗口的关闭图标.我试图删除此图标,但无法找到id或类.
那么有人可以帮我从信息窗口删除关闭图标吗?
我有Zend Framework 2的问题.
我希望每个动作都有2个视图脚本,以显示PC和智能手机的相应视图.我知道如何更改布局:
$viewModel->setTemplate(layout_path)
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但我无法找到如何更改视图脚本.
我在索引视图文件夹中有以下文件Application/view/application/index,用于IndexController:
index.php (view file for PC)
index_sp.php (view file for smartphone)
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如何将视图脚本更改为index_sp.php控制器或控制器插件?
我正在使用zf2,rbcomments,doctrine,zfcuser和samuser实体...我有一个问题,在onbootstrap之前,我的应用程序抛出"会话验证失败"错误.除了身份验证之外,我不会在任何地方使用会话(由zfcuser完成,而不是手动完成).这是调用堆栈:
Additional information:
Zend\Session\Exception\RuntimeException
File:
C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Session\SessionManager.php:111
Message:
Session validation failed
Stack trace:
#0 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Session\AbstractContainer.php(78): Zend\Session\SessionManager->start()
#1 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Authentication\Storage\Session.php(63): Zend\Session\AbstractContainer->__construct('Zend_Auth', NULL)
#2 C:\wamp\www\vendor\zf-commons\zfc-user\src\ZfcUser\Authentication\Storage\Db.php(116): Zend\Authentication\Storage\Session->__construct()
#3 C:\wamp\www\vendor\zf-commons\zfc-user\src\ZfcUser\Authentication\Storage\Db.php(42): ZfcUser\Authentication\Storage\Db->getStorage()
#4 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Authentication\AuthenticationService.php(134): ZfcUser\Authentication\Storage\Db->isEmpty()
#5 C:\wamp\www\vendor\zf-commons\zfc-user\src\ZfcUser\View\Helper\ZfcUserIdentity.php(23): Zend\Authentication\AuthenticationService->hasIdentity()
#6 [internal function]: ZfcUser\View\Helper\ZfcUserIdentity->__invoke()
#7 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\View\Renderer\PhpRenderer.php(400): call_user_func_array(Object(ZfcUser\View\Helper\ZfcUserIdentity), Array)
#8 C:\wamp\www\module\Application\view\layout\layout.phtml(118): Zend\View\Renderer\PhpRenderer->__call('zfcUserIdentity', Array)
#9 C:\wamp\www\module\Application\view\layout\layout.phtml(118): Zend\View\Renderer\PhpRenderer->zfcUserIdentity()
#10 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\View\Renderer\PhpRenderer.php(507): include('C:\\wamp\\www\\mod...')
#11 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\View\View.php(205): Zend\View\Renderer\PhpRenderer->render(Object(Zend\View\Model\ViewModel))
#12 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Mvc\View\Http\DefaultRenderingStrategy.php(102): Zend\View\View->render(Object(Zend\View\Model\ViewModel))
#13 [internal function]: Zend\Mvc\View\Http\DefaultRenderingStrategy->render(Object(Zend\Mvc\MvcEvent))
#14 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\EventManager\EventManager.php(468): call_user_func(Array, Object(Zend\Mvc\MvcEvent))
#15 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\EventManager\EventManager.php(207): Zend\EventManager\EventManager->triggerListeners('render', Object(Zend\Mvc\MvcEvent), Array)
#16 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Mvc\Application.php(347): Zend\EventManager\EventManager->trigger('render', Object(Zend\Mvc\MvcEvent))
#17 C:\wamp\www\vendor\zendframework\zendframework\library\Zend\Mvc\Application.php(300): Zend\Mvc\Application->completeRequest(Object(Zend\Mvc\MvcEvent))
#18 C:\wamp\www\public\index.php(26): Zend\Mvc\Application->run()
#19 {main} …Run Code Online (Sandbox Code Playgroud)