在 cakephp 3 中用两个外键链接相同的 table

Question

我有一个 table match_schedules 存储两个 teams 之间的匹配项。有tableteams存储队伍信息

match_schedules 的列是

+-----+---------+---------+-------+-------+
| id  | team_a  | team_b  | date  | venue |
+-----+---------+---------+-------+-------+

因为我有两列 team_a 和 team_b 引用 teams table，我不能在这两列中使用 team_id 作为外键。

现在，我想将这两列与 teams table 相关联，以便我可以轻松检索相关数据，例如

$matches = $this->MatchSchedules->find('all', [
  'contain' => [
      'Teams'
  ]
]);

我试过了 在TeamsTable.php

$this->belongsTo('MatchSchedules', [
    'foreignKey' => 'team_a',
    'joinType' => 'INNER'
]);
$this->belongsTo('MatchSchedules', [
    'foreignKey' => 'team_b',
    'joinType' => 'INNER'
]);

在MatchSchedulesTable.php

$this->hasMany('Teams', [
    'foreignKey' => 'team_a'
]);
$this->hasMany('Teams', [
    'foreignKey' => 'team_b'
]);

但这不起作用。

Answer 1

您没有正确设置关联

TeamsTable.php

$this->hasMany('MatchSchedulesA', [
    'foreignKey' => 'team_a',
    'className' => 'MatchSchedules'
]);
$this->hasMany('MatchSchedulesB', [
    'foreignKey' => 'team_b',
    'className' => 'MatchSchedules'
]);

在MatchSchedulesTable.php

$this->belongsTo('TeamsA', [
    'foreignKey' => 'team_a',
    'joinType' => 'INNER',
    'className' => 'Teams'
]);
$this->belongsTo('TeamsB', [
    'foreignKey' => 'team_b',
    'joinType' => 'INNER',
    'className' => 'Teams'
]);

和

$matches = $this->MatchSchedules->find('all', [
  'contain' => [
      'TeamsA',
      'TeamsB
  ]
]);

很高兴，如果你重命名：

MatchSchedulesA to HomeMatches 
MatchSchedulesB to GuestMatches 
team_a to home_team 
team_b to guest_team 
TeamsA to HomeTeams 
TeamsB to GuestTeams

在 cakephp 3 中用两个外键链接相同的 table

Linking same table with two foreign keys in cakephp 3

cakephp

model-associations

cakephp-3.2