TL / DR:
我在两个使用withPivot
和using
的模型之间建立了多对多关系。我想从外键的withPivot
值中获取相关数据。
我正在处理一个多租户项目,该项目有一个master
数据库和tenant
数据库。
App\Tenant\
中的任何模型当前都使用$connection
属性。
我的模型及其关联表具有以下结构:
- App/Tenant/Match
- App/Tenant/MatchTeam
- App/Team
- App/Ground
team
和match
之间的关系为many-to-many
(team
可以播放多个matches
,而match
可以播放多个teams
)
Match.php
namespace App\Tenant
class Match extends TenantModel
public function teams() {
return $this->belongsToMany(Team::class, 'tenant.match_team', 'match_id', 'team_uuid')
->using(MatchTeam::class)
->withPivot('ground_id');
}
Team.php
namespace App
class Team extends Model
protected $primaryKey = 'uuid';
public $incrementing = false;
public function grounds() {
return $this->hasMany(Ground::class, 'team_uuid', 'uuid');
}
public function matches() {
return $this->belongsToMany(Match::class, 'tenant.match_team', 'team_uuid', 'match_id')
->using(MatchTeam::class)
->withPivot('ground_id')
;
}
MatchTeam.php
class MatchTeam extends Pivot
protected $connection = 'tenant';
protected $table = 'match_team';
public function ground() {
return $this->hasOne(Ground::class);
}
比赛团队表:
| id | team_uuid | match_id | ground_id |
|----| ------------------ | -------- | --------- |
| 1 | kajdnfgkasdnfadsgn | 1 | NULL |
| 2 | lsdjfgsadlkfjglsdj | 2 | 4 |
| 2 | kshdfkjdshfytufjek | 3 | 1 |
如何访问与ground_id
数据透视表上的match_team
字段相关的地面数据?
我主要追求的是match->ground->name
之类的东西,它是match_team
表上外键的关系。
我尝试了以下操作:
MatchController.php
public function show(Match $match) {
$match = Match::where('id', $match->id)->with('ground')->first();
}
但是它给出了Call to undefined relationship [ground]
DD($ match),如下所示
Interaction {#215 ▼
#table: "matches"
#connection: "tenant"
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: true
+wasRecentlyCreated: false
#attributes: array:19 [▶]
#original: array:19 [▶]
#changes: []
#casts: []
#dates: []
#dateFormat: null
#appends: []
#dispatchesEvents: []
#observables: []
#relations: array:1 [▼
"ground" => null
]
#touches: []
+timestamps: true
#hidden: []
#visible: []
#fillable: []
#guarded: array:1 [▶]
}
答案 0 :(得分:0)
正如您的错误所说,匹配模型中没有地面关系 因此,在您的匹配模型
中public function ground() {
return $this->hasOne(Ground::class,'foreign_key', 'local_key');
}
编辑
由于我不知道表结构
可能会帮助您
方法一:
if(! is_null($match->pivot->ground))
{
$groundName = $match->pivot->ground->name;
}else{
$groundName = 'Ground Not Set';
}
方法二:
$groundName = $match->ground['name'] ?? 'Ground Not Set';