Question

我想对客户表做一些事情，并且有很多记录，所以我将使用块功能来执行每100条记录。我还想添加一个进度条来显示进度。

但我写的代码不起作用。错误发生在“$ bar”变量。

$count = DB::table('customers')->count();
$bar = $this->output->createProgressBar($count);

DB::table('customers')->chunk(100, function ($customers,$bar) {
  foreach($customers as $customer) {
   //do something with customer
   $bar->advance();
  }
  $bar->finish();
}

Answer 1

这是正确的方法：

->chunk(100, function ($users) use ($bar){}

Answer 2

以前的答案是 50% 正确

DB::table('customers')->chunk 每 100 行运行一次，因此您必须添加 $bar->finish();退出回调

$count = DB::table('customers')->count();
$bar = $this->output->createProgressBar($count);

DB::table('customers')->chunk(100, function ($customers,$bar) use($bar) {
  foreach($customers as $customer) {
   //do something with customer
   $bar->advance();
  }
}
$bar->finish();

如何在Laravel块功能中添加进度条

2 个答案: