在我的TestPage中仔细编写了 http://demos.telerik.com/php-ui/grid/foreignkeycolumn 的代码.php（只是更改数据库连接）并使用演示的确切文件DaraSourceResult.php，它仍然提出了2个错误：
1） 当网格呈现时，它从数据库中引入数据，但外键列为空。
2）如果您单击外键列，它成功显示数据库中的类别名称，但是当您选择一个类别时它不起作用，可能是因为它正在尝试使用数字字段中的文本。
我附上了一张图片，显示了上述每个错误。下面还有我在TestPage中使用的代码.php。
你能帮我解决这两个错误吗？
多谢！
带有上述错误的图片
<?php
require $_SERVER['DOCUMENT_ROOT'] . '/lib/Kendo/Autoload.php';
require $_SERVER['DOCUMENT_ROOT'] . '/lib/DataSourceResult.php';
?>
<?php
$result = new DataSourceResult('mysql:host=localhost;dbname=db', 'user', '******'); //ok
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
header('Content-Type: application/json');
$request = json_decode(file_get_contents('php://input'));
$type = $_GET['type'];
$columns = array('PKEntrada', 'Descricao', 'Valor', 'FKCategoriaEntrada');
switch($type) {
case 'create':
$result = $result->create('tblentradas', $columns, $request->models, 'PKEntrada');
break;
case 'read':
$result = $result->read('tblentradas', $columns, $request);
break;
case 'update':
$result = $result->update('tblentradas', $columns, $request->models, 'PKEntrada');
break;
case 'destroy':
$result = $result->destroy('tblentradas', $request->models, 'PKEntrada');
break;
}
echo json_encode($result);
exit;
}
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="styles/kendo.common.min.css" />
<link href="styles/kendo.bootstrap.min.css" rel="stylesheet" />
<script src="js/jquery.min.js"></script>
<script src="js/kendo.all.min.js"></script>
</head>
<body>
<?php
$categories = $result->read('tblcategoriasentrada', array('PKCategoriaEntrada as value', 'Categoria as text'));
$transport = new 'Kendo'Data'DataSourceTransport();
$create = new 'Kendo'Data'DataSourceTransportCreate();
$create->url('TestPage.php?type=create')
->contentType('application/json')
->type('POST');
$read = new 'Kendo'Data'DataSourceTransportRead();
$read->url('TestPage.php?type=read')
->contentType('application/json')
->type('POST');
$update = new 'Kendo'Data'DataSourceTransportUpdate();
$update->url('TestPage.php?type=update')
->contentType('application/json')
->type('POST');
$destroy = new 'Kendo'Data'DataSourceTransportDestroy();
$destroy->url('TestPage.php?type=destroy')
->contentType('application/json')
->type('POST');
$transport->create($create)
->read($read)
->update($update)
->destroy($destroy)
->parameterMap('function(data) {
return kendo.stringify(data);
}');
$model = new 'Kendo'Data'DataSourceSchemaModel();
$productIDField = new 'Kendo'Data'DataSourceSchemaModelField('PKEntrada');
$productIDField->type('number')
->editable(false)
->nullable(true);
$productNameField = new 'Kendo'Data'DataSourceSchemaModelField('Descricao');
$productNameField->type('string')
->validation(array('required' => true));
$unitPriceValidation = new 'Kendo'Data'DataSourceSchemaModelFieldValidation();
$unitPriceValidation->required(true)
->min(1);
$unitPriceField = new 'Kendo'Data'DataSourceSchemaModelField('Valor');
$unitPriceField->type('number')
->validation($unitPriceValidation);
$categoryIDField = new 'Kendo'Data'DataSourceSchemaModelField('FKCategoria');
$categoryIDField->type('number');
$model->id('PKEntrada')
->addField($productIDField)
->addField($productNameField)
->addField($unitPriceField)
->addField($categoryIDField);
$schema = new 'Kendo'Data'DataSourceSchema();
$schema->data('data')
->errors('errors')
->model($model)
->total('total');
$dataSource = new 'Kendo'Data'DataSource();
$dataSource->transport($transport)
->batch(true)
->pageSize(30)
->schema($schema);
$grid = new 'Kendo'UI'Grid('grid');
$productName = new 'Kendo'UI'GridColumn();
$productName->field('Descricao')
->title('Description');
$unitPrice = new 'Kendo'UI'GridColumn();
$unitPrice->field('Valor')
->format('{0:c}')
->width(200)
->title('Value');
$categoryID = new 'Kendo'UI'GridColumn();
$categoryID->field('FKCategoria')
->title('FKCategory')
->values($categories['data'])
->width(200);
$command = new 'Kendo'UI'GridColumn();
$command->addCommandItem('destroy')
->title(' ')
->width(150);
$grid->addColumn($productName, $categoryID, $unitPrice, $command)
->dataSource($dataSource)
->addToolbarItem(new 'Kendo'UI'GridToolbarItem('create'),
new 'Kendo'UI'GridToolbarItem('save'), new 'Kendo'UI'GridToolbarItem('cancel'))
->height(540)
->navigatable(true)
->editable(true)
->groupable(true)
->pageable(true);
echo $grid->render();
?>
我发现了错误。我只是变量中的列字段名称有问题。它没有使用FKCategoriaEntrada，而是尝试使用FKCategoria。
代码现在运行流畅。如果需要，您可以使用它。