在phalcon框架中,我想填充相关的下拉类别列表。但是我在代码中遇到了一些问题:
#1在选择类别列表->子类别列表上显示:未定义(未使用值填充选项)
#2。如果数据库没有数据console.log显示:未定义的变量:我控制器中的resData
#3。如果选择值为“ 0”的类别,则不会再次禁用子类别列表
我在代码中做错了什么?
[Module.php]
use Phalcon\Mvc\View;
use Phalcon\Mvc\View\Engine\Volt;
$di->setShared('view', function () use ($config){
$view = new View();
$view->setViewsDir(APP_PATH . $config->appB->viewsDir);
# Register Volt Template
$view->registerEngines(array(
".volt" => function($view, $di) use ($config) {
$volt = new Volt($view, $di);
$volt->setOptions(
array(
'compiledPath' => APP_PATH . $config->appB->cacheDir,
'compiledExtension' => '.php',
'compiledSeparator' => '_',
'compileAlways' => true,
'autoescape' => false,
'stat' => true
)
);
$compiler = $volt->getCompiler();
$compiler->addFunction('strtotime','strtotime');
return $volt;
}
));
return $view;
});
[CONTROLLER]
public function entryAction()
{
$formAction = 'backend/index/insert';
$this->view->setVar('action',$formAction);
$this->view->product_title = '';
$this->view->product_price = '';
$this->view->product_keyword = '';
$this->view->product_image = '';
$this->view->product_desc = '';
$category = Categories::find();
$this->view->setVar('categories',$category);
$this->view->pick("index/entry");
}
public function getSubcategoryAction()
{
$id = $this->request->getPost('id');
$data = Subcat::findBycategory_id($id);
$resData = array();
foreach($data as $result)
{
$resData[] = array('id' => $result->id, 'category_id' => $result->category_id, 'subcategory' => $result->subcategory_name);
}
echo(json_encode($resData));
//$this->view->setVar('subcategory',$resData);
}
[输入电压]
Category:<select name="category" id="category">
<option value="0">Choose Category ...</option>
{% for category in categories %}
<option value="{{category.id}}">{{category.categoryname}}</option>
{% endfor %}
</select><br/>
sub-Category:<select name="subcategory" id="subcategory" disabled="disabled"><option value="0">Choose Sub-Category ...</option></select>
<br/>
Products:<select name="products" id="products" disabled="disabled"><option value="0">Choose a Product ...</option></select>
<br/>
[JQUERY]
$("select[name='category']").on("change", function(e){
e.preventDefault();
var value = $(this).val();
$("select[name='subcategory']").attr("disabled", false);
$.ajax({
type: "POST",
url: "http://localhost/shopping/backend/index/getSubcategory",
data:'id='+value,
}).done(function(response){
$("#subcategory").not(":first").remove();
response = JSON.parse(response);
response.forEach(function(value){
$('#subcategory').append('<option value="'+value.id+'">'+value.subcategory+'</option>');
});
}).fail(function(){
console.log('error: Please reload page and try again!');
}).always(function(){
console.log('Complete:');
});
});
最佳答案
请注意,在控制器的第一行中,您将禁用视图,因此不会处理Volt。在您现在工作时,jQuery仅接收JSON结果,因此您要附加JSON而不是Volt。
您必须选择一个路径:要么使用Volt,在这种情况下,您必须在两个操作中都删除第1行并使用参数处理视图,或者继续向jQuery发送JSON数据,并正确设置以处理JSON响应(检查此answer)
在您的情况下,getSubcategoryAction()
看起来像:
public function getSubcategoryAction()
{
//$this->view->disable(); //Replaced by:
$this->view->setRenderLevel(
View::LEVEL_ACTION_VIEW
);
$id = $this->request->getPost('id');
$data = Subcat::findBycategory_id($id);
foreach($data as $result)
{
$resData[] = array('id' => $result->id, 'category_id' => $result->category_id, 'subcategory' => $result->subcategory_name);
}
$this->view->setVar('categories', $resData);
}
假设您已在DI中将Volt设置为渲染引擎,并且Volt模板对应于../app/views/index/getSubcategory.phtml,即:
<?php
use Phalcon\Mvc\View;
use Phalcon\Mvc\View\Engine\Volt;
// Register Volt as a service
$di->set(
'voltService',
function ($view, $di) {
$volt = new Volt($view, $di);
$volt->setOptions(
[
'compiledPath' => '../app/compiled-templates/',
'compiledExtension' => '.compiled',
]
);
return $volt;
}
);
// Register Volt as template engine
$di->set(
'view',
function () {
$view = new View();
$view->setViewsDir('../app/views/');
$view->registerEngines(
[
'.volt' => 'voltService',
]
);
return $view;
}
);
伏特注册代码从以下位置复制:https://docs.phalconphp.com/en/3.4/volt根据您的App结构修改目录。
关于php - 依赖于Phalcon的下拉列表填充,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/52963830/