Question

我正在开发一个可以使用Catalyst框架通过浏览器访问的MySQL数据库。用户可以使用特定ID（车牌）和/或特定车辆颜色从搜索框中搜索数据库。

问题在于，当我搜索数据库中存在的某些ID时，它们不会显示在结果中，而其他ID会显示在结果中。如果我手动更改浏览器中的URL，我可以正确访问我测试的所有ID，所以我猜问题就在于我的搜索功能。

我在控制器中的功能就是这个

sub search : Local : Args(0) {

  my ($self, $c) = @_;

  my $schema           = $c->model('DB');
  my $car_plate        = $c->request->params->{car_plate} || 'N/A';
  my $car_model        = $c->request->params->{car_model} || 'N/A';
  my $result_set       = "";
  my $result_set_count = 0;

  if (($car_plate ne 'N/A') && ($car_model ne 'Select model')) { # car plate AND car model entered
    $result_set = [
      $schema->resultset('Car')->search({
          'plates' => { 'like', '%' . $car_plate . '%' },
          'colors' => $car_model
        },
      )->all
    ];
  }

  elsif (($car_plate eq 'N/A') && ($car_model ne 'Select model')) { # car plate blank, car model entered
    $result_set = [
      $schema->resultset('Car')->search(
        { 'colors' => $car_model },
      )->all
    ];
  }

  elsif (($car_plate ne 'N/A') && ($car_model eq 'Select model')) { # car plate entered, car model blank
    $result_set = [
      $schema->resultset('Car')->search(
        { 'plates' => { 'like', '%' . $car_plate . '%' } },
      )->all
    ];
  }

  if (($car_plate ne 'N/A') && ($car_model ne 'Select model')) {
    $result_set_count = $c->model('DB::Car')->search({
        'plates' => { 'like', '%' . $car_plate . '%' },
        'colors' => $car_model
      }
    )->all;
  }
  elsif (($car_plate eq 'N/A') && ($car_model ne 'Select model')) {
    $result_set_count = $c->model('DB::Car')->search({ 'colors' => $car_model })->all;
  }
  elsif (($car_plate ne 'N/A') && ($car_model eq 'Select model')) {
    $result_set_count = $c->model('DB::Car')->search({ 'plates' => { 'like', '%' . $car_plate . '%' } })->all;
  }

  my $error_message = "";

  if ($result_set_count == 0) {

    $error_message = "<p>Not found</p>";
    $c->stash(
      errorcount => $error_message,
      Cars       => $result_set,
      template   => 'cars/search_no_results.tt'
    );
  }
  else {

    $c->stash(
      errorcount => $error_message,
      Cars       => $result_set,
      template   => 'cars/search_cars.tt'
    );
  }

  $c->response->header('Cache-Control' => 'no-cache');
}

Answer 1

$ result_set_count将是一个数组（你实际上并没有使用count（）函数）

替换

之类的行

$result_set_count = $c->model('DB::Car')->search({ 'plates' => { 'like', '%' . $car_plate . '%' } })->all;

通过

$result_set_count = $c->model('DB::Car')->count('plates' => { 'like', '%' . $car_plate . '%' });

然后，通过执行一次数据库查询来优化代码：

my $rs = $c->model('DB::Car')->search_rs({ ... }, { });
my $count = $rs->count;
my $set = [ $rs->all ];

Answer 2

您是否尝试过获取DBIx :: Class生成的SQL输出，然后直接在MySQL中运行它？

请参阅：Can I pretty-print the DBIC_TRACE output in DBIx::Class?

MySQL搜索在Catalyst框架中无法正常运行

2 个答案: