我有一个成员的CSV文件,我每月收到一次,其中包含约6000行。
我正在(试图)遍历CSV文件,检查record
表中是否已经存在members
,如果是,则检查其是否相同。
然后将其插入pending
表中(在适当的地方带有 exist 标志)。
我正在使用Laravel和League\CSV读取保存在storage
文件夹中的文件:
class ImportController extends Controller
{
public function import(Request $request) {
$readDirectory = 'storage/csv/';
$filename = $request->name;
$stream = fopen($readDirectory.$filename, 'r');
$reader = Reader::createFromStream($stream, 'r')->setHeaderOffset(0);
$records = (new Statement())->process($reader);
// Truncate the imported table prior to import
Imported::truncate();
foreach ($records as $record) {
$email = $record['email'];
$recordExists = $this->recordExists($email);
if($recordExists) {
// Compare the md5 of the recordArray and the memberArray and skip the record if thit's the same.
$memberArray = $this->getmemberArray($recordExists);
$recordArray = $this->getRecordArray($record);
if($memberArray['hash'] === $recordArray['hash']) { continue; }
$record['exists'] = TRUE;
$this->write($record);
continue;
}
else
{
$record['exists'] = FALSE;
$this->write($record);
Log::debug("missing: ".$record['URN']);
continue;
}
};
// End Foreach Loop
return redirect()->route('upload.show');
}
public function recordExists($urn){
$member = Member::where('email', 'LIKE', $email)->first();
if ($member == null) { return false; }
return $member;
}
public function getmemberArray($member) {
$memberArray = [
'email' => $member->email,
'first_name' => $member->first_name,
'last_name' => $member->last_name,
'age_years' => $member->age_years,
'gender' => $member->gender,
'address_1' => $member->address_1,
'address_2' => $member->address_2,
'address_3' => $member->address_3,
'town' => $member->town,
'county' => $member->county,
'postcode' => $member->postcode,
'sport_1' => $member->sport_1,
'sport_2' => $member->sport_2,
];
$memberArray['hash'] = md5(json_encode($memberArray));
return $memberArray;
}
public function getRecordArray($record) {
$recordArray = [
'email' => $record['email'],
'first_name' => $record['first_name'],
'last_name' => $record['last_name'],
'age_years' => $record['age_years'],
'gender' => $record['gender'],
'address_1' => $record['address_1'],
'address_2' => $record['address_2'],
'address_3' => $record['address_3'],
'town' => $record['town'],
'county' => $record['county'],
'postcode' => $record['postcode'],
'sport_1' => $record['sport_1'],
'sport_2' => $record['sport_2'],
];
$recordArray['hash'] = md5(json_encode($recordArray));
return $recordArray;
}
public function write($record) {
$import = [];
$import['email'] = $record['email'],
$import['first_name'] = $record['first_name'],
$import['last_name'] = $record['last_name'],
$import['age_years'] = $record['age_years'],
$import['gender'] = $record['gender'],
$import['address_1'] = $record['address_1'],
$import['address_2'] = $record['address_2'],
$import['address_3'] = $record['address_3'],
$import['town'] = $record['town'],
$import['county'] = $record['county'],
$import['postcode'] = $record['postcode'],
$import['sport_1'] = $record['sport_1'],
$import['sport_2'] = $record['sport_2'],
$import['exists'] = $record['exists']
DB::table('imported')->insert(
$import
);
Log::debug($record['email']);
return TRUE;
}
}
但是我不断得到:
Symfony \ Component \ Debug \ Exception \ FatalErrorException (E_UNKNOWN)
Allowed memory size of 134217728 bytes exhausted (tried to allocate 181321056 bytes)
如果我在CSV中使用的行数少得多,则可以使用,但这不是一种选择。
我以前使用eloquent->save()
写数据库,但是将其更改为DB::table()->insert
以提高性能。
为了测试目的,我已经添加了以下内容,但仍无法解决。
set_time_limit(0);
ini_set('max_execution_time', 100000);
ini_set('memory_limit','512m');
我想念什么吗?某处发生某种内存泄漏?
我猜它每次都会将记录保存在内存中,所以有什么方法可以让每一行都忘记它吗?
也: 有没有办法清除此内存,以便我可以编辑代码并重试?
即使我停止并重新运行php artisan serve
,它仍然保留相同的错误消息。
答案 0 :(得分:3)
这里的问题是,idNumber
在执行以下操作时会将整个CSV文件读入内存:
League\CSV
您应该像这样使用 $records = (new Statement())->process($reader);
的{{1}}方法来一次只读取特定数量的行:
chunk
Reader
方法返回一个Generator,您可以对其进行迭代。您可以找到提到的here in the documentation。
编辑:我误读了文档,并建议使用错误的方法。
您基本上只需要遍历foreach($reader->chunk(50) as $row) {
// do whatever
}
本身:
chunk
如果您使用的是Mac,或者您的CSV是在Mac上创建的,则需要使用以下内容才能成功读取大型CSV文件:
$reader
请参阅文档的this part。
答案 1 :(得分:-1)
我知道您正在使用php artisan serve
运行服务器。您可以尝试部署某种形式的实际Web服务器,因为您将在生产环境中使用它。您可以尝试Apache,在Windows和Linux的XAMPP中很容易获得。
您可以在线检查如何在操作系统上安装Apache HTTP Server或Nginx。这些具有比php默认服务器更好的控制和使用内存。