Question

我有两个表VEHICLE和PASSENGER。车辆可容纳多名乘客。因此PASSENGER表具有vehicleId列。我需要过滤并排序显示按乘客人数显示车辆的视图。

VehicleEntity和PassengerEntity用于映射到基础。

public class VehicleEntity
{
  public virtual long DbId {get; set;}
  public virtual string licence {get; set;}

  public virtual ISet<PassengerEntity> Passengers {get; set;}
}

public class VehicleEntityMap : ClassMap<VehicleEntity>
{
  Table("Vehicle");

  Id(x => x.DbId)

  Map(x => x.licence);
  HasMany(x => x.Passengers).KeyColumn("VehicleDbID).Inverse();
}

和旅客实体

public class PassengerEntity
{
  public virtual DbId {get; set;}
  public virtual VehicleEntity Vehicle {get; set;}
}

public class PassengerEntityMap : ClassMap<PassengerEntity>
{
  Table("Passenger");

  Id(x => x.DbId)

  References(p => p.Vehicle).Column("VehicleDbId).Index("IXFK_Passenger_Vehicle");
  HasMany(x => x.Passengers).KeyColumn("VehicleDbID).Inverse();
}

我通过使用以下方法管理了过滤器部分：

VehicleEntity v = null;
PassengerEntity p = null;
IQueryOver<VehicleEntity , VehicleEntity > orderQuery=
            context.Session.QueryOver<VehicleEntity >(() => o);

orderQuery = orderQuery.Left.JoinAlias(() => o.Vehicles, () => v);
subQuery = QueryOver.Of<PassengerEntity>(() => p)
              .Where(() => p.Vehicle.DbId == v.DbId)
              .ToRowCountQuery();
orderFilterQuery = orderQuery.WithSubquery.WhereValue(2).Eq(sbuQuery);

现在我需要根据乘客人数按升序/降序对车辆进行排序。

Answer 1

您可以使用$client_id = 'xxx'; $refresh_token='xxx'; $client_secret='xxx'; function GetRefreshedAccessToken($client_id, $refresh_token, $client_secret) { $url_token = 'https://www.googleapis.com/oauth2/v4/token'; $curlPost = 'client_id=' . $client_id . '&client_secret=' . $client_secret . '&refresh_token='. $refresh_token . '&grant_type=refresh_token'; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url_token); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost); $data = json_decode(curl_exec($ch), true); print_r($data); exit; $http_code = curl_getinfo($ch,CURLINFO_HTTP_CODE); if($http_code != 200) { throw new Exception('Error : Failed to refresh access token'); } return $data; } add_action('wpcf7_before_send_mail', 'save_application_form'); function save_application_form($wpcf7) { $client_id = 'xxx'; $refresh_token='xxx'; $client_secret='xxx'; global $wpdb; $wpcf7 = WPCF7_ContactForm :: get_current() ; $submission = WPCF7_Submission::get_instance(); if ($submission) { $submited = array(); $submited['title'] = $wpcf7->title(); $submited['posted_data'] = $submission->get_posted_data(); $uploaded_files = $submission->uploaded_files(); $cf7_file_field_name = 'file-846'; $image_location = $uploaded_files[$cf7_file_field_name]; $test = pathinfo($image_location); } GetRefreshedAccessToken($client_id, $refresh_token, $client_secret); $token = GetRefreshedAccessToken($client_id, $refresh_token, $client_secret); $url = "https://www.googleapis.com/upload/drive/v3/files?uploadType=media"; $headers = array( "Content-Type: image/jpeg", "Authorization: Bearer ".$token ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); curl_setopt($ch, CURLOPT_BINARYTRANSFER, TRUE); curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); curl_setopt($ch, CURLOPT_POST, true); //$data1 = '@'.realpath('./metadata.json').';type=application/json;charset=UTF-8'; //$data2 = '@'.realpath('./test.csv').';type=text/csv'; $postdata = array( 'file' => file_get_contents($image_location) ); curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata); $output = curl_exec($ch); $err = curl_error($ch); curl_close($ch); if ($err) { echo "cURL Error #:" . $err; } else { echo $output; } }对.OrderBy()使用相同的子查询。（顺便说一句，如果您像在示例中那样过滤记录，那么按乘客人数排序不会做太多，因为您只会得到乘客人数相同的记录。）

Projection

生成的SQL将类似于：

orderQuery.OrderBy(Projections.SubQuery(subQuery)).Asc;

NHibernate按子集合计数排序

1 个答案: