自定义网站 Laravel Excel 排队导出序列化错误
Maatwebsite Laravel Excel queued export serialization error
我正在使用 Maatwebsite\Excel 在我的应用程序中处理数据导出。有些出口相当大,所以我想排队出口。我遵循了 documentation,但在尝试导出时出现以下错误:
You cannot serialize or unserialize PDO instances
我知道 PDO 实例不能被序列化,我只是不明白为什么它告诉我,因为我正在按照文档中的说明进行操作。这是我的代码:
控制器
$path = 'public/validations/' . $filename;
//the $client var is a record retrieved from a model, $input is the result of $request->all()
(new ValidationsExport($client, $input))->queue($path)->chain([
// the script never reaches here, but $user is from \Auth::user()
new NotifyUserOfValidationExport($user, $filename),
]);
导出
class ValidationsExport implements FromQuery, WithHeadings, WithMapping, WithStrictNullComparison, WithCustomQuerySize, WithEvents, WithColumnFormatting
{
use Exportable;
private $client;
private $input;
public function __construct($client, $input)
{
$this->client = $client;
$this->input = $input;
}
public function query()
{
// this does return a query builder object, but this is required for FromQuery and is shown in the docs as an example of how to queue an export
$this->validations = $this->getValidations();
return $this->validations;
}
public function querySize(): int
{
$query = ....
$size = $query->count();
return $size;
}
public function headings(): array
{
// this is an array
return $this->columns;
}
public function columnFormats(): array
{
return [
'A' => NumberFormat::FORMAT_TEXT,
'B' => NumberFormat::FORMAT_TEXT,
'C' => NumberFormat::FORMAT_TEXT
];
}
public function map($row): array
{
$mapping = [];
foreach($row as $key => $value) {
if(is_bool($value)) {
if($value) {
$mapping[$key] = "Yes";
} else {
$mapping[$key] = "No";
}
}else{
$mapping[$key] = $value;
}
}
return $mapping;
}
//.......
}
我假设问题出在使用 FromQuery
,但我不能使用 FromCollection
,因为我 运行 由于导出太大而内存不足。我需要 FromQuery
使用的内置分块。有没有一种方法可以使用 FromQuery
对导出进行排队?
您可能不需要为该构建器设置成员变量 $this->validations
。这就是最终试图被序列化的东西。如果您只是要 return 它,则不需要在 class.
上存储副本
我正在使用 Maatwebsite\Excel 在我的应用程序中处理数据导出。有些出口相当大,所以我想排队出口。我遵循了 documentation,但在尝试导出时出现以下错误:
You cannot serialize or unserialize PDO instances
我知道 PDO 实例不能被序列化,我只是不明白为什么它告诉我,因为我正在按照文档中的说明进行操作。这是我的代码:
控制器
$path = 'public/validations/' . $filename;
//the $client var is a record retrieved from a model, $input is the result of $request->all()
(new ValidationsExport($client, $input))->queue($path)->chain([
// the script never reaches here, but $user is from \Auth::user()
new NotifyUserOfValidationExport($user, $filename),
]);
导出
class ValidationsExport implements FromQuery, WithHeadings, WithMapping, WithStrictNullComparison, WithCustomQuerySize, WithEvents, WithColumnFormatting
{
use Exportable;
private $client;
private $input;
public function __construct($client, $input)
{
$this->client = $client;
$this->input = $input;
}
public function query()
{
// this does return a query builder object, but this is required for FromQuery and is shown in the docs as an example of how to queue an export
$this->validations = $this->getValidations();
return $this->validations;
}
public function querySize(): int
{
$query = ....
$size = $query->count();
return $size;
}
public function headings(): array
{
// this is an array
return $this->columns;
}
public function columnFormats(): array
{
return [
'A' => NumberFormat::FORMAT_TEXT,
'B' => NumberFormat::FORMAT_TEXT,
'C' => NumberFormat::FORMAT_TEXT
];
}
public function map($row): array
{
$mapping = [];
foreach($row as $key => $value) {
if(is_bool($value)) {
if($value) {
$mapping[$key] = "Yes";
} else {
$mapping[$key] = "No";
}
}else{
$mapping[$key] = $value;
}
}
return $mapping;
}
//.......
}
我假设问题出在使用 FromQuery
,但我不能使用 FromCollection
,因为我 运行 由于导出太大而内存不足。我需要 FromQuery
使用的内置分块。有没有一种方法可以使用 FromQuery
对导出进行排队?
您可能不需要为该构建器设置成员变量 $this->validations
。这就是最终试图被序列化的东西。如果您只是要 return 它,则不需要在 class.