[英]Laravel belongsTo relationship not returning values
我试图运行一个 hasMany,但我真的不知道为什么我没有得到任何结果! 两个表:公司,工作订单,每个工作订单都有一个公司名称和地址,我想在laravel中使用belongsTo关系
<?php
namespace App;
class Company extends Model
{
protected $table = 'company';
protected $primaryKey = 'company_id';
public function jobs() {
return $this->hasMany('App\Joborder');
}
}
我的工作订单页面
<?php
namespace App;
class Joborder extends Model
{
protected $table = "joborder";
public $primaryKey = "joborder_id";
protected $dates = [
'start_date',
'created_at',
'updated_at'
];
public function company() {
return $this->belongsTo('App\Company');
}
}
这是页面控制器:
public function joblist() {
$joblist = Joborder::all();
$newInstance = new Joborder;
$company = $newInstance->company();
dd($company->name);
dd($joblist);
return view('pages.joblist')->with('jobs',$joblist);
}
这是我的页面运行后的 dd
BelongsTo {#217 ▼
#foreignKey: "company_id"
#otherKey: "company_id"
#relation: "company"
#query: Builder {#218 ▶}
#parent: Joborder {#205 ▼
#table: "joborder"
+primaryKey: "joborder_id"
#dates: array:3 [▼
0 => "start_date"
1 => "created_at"
2 => "updated_at"
]
#guarded: array:1 [▼
0 => "id"
]
#fillable: []
#connection: null
#keyType: "int"
#perPage: 15
+incrementing: true
+timestamps: true
#attributes: []
#original: []
#relations: []
#hidden: []
#visible: []
#appends: []
#dateFormat: null
#casts: []
#touches: []
#observables: []
#with: []
#morphClass: null
+exists: false
+wasRecentlyCreated: false
}
#related: Company {#212 ▼
#table: "company"
#primaryKey: "company_id"
#guarded: array:1 [▼
0 => "id"
]
#fillable: []
#connection: null
#keyType: "int"
#perPage: 15
+incrementing: true
+timestamps: true
#attributes: []
#original: []
#relations: []
#hidden: []
#visible: []
#appends: []
#dates: []
#dateFormat: null
#casts: []
#touches: []
#observables: []
#with: []
#morphClass: null
+exists: false
+wasRecentlyCreated: false
}
}
我在公司中有 company_id 作为 pkey,在 joborder 中有作为 fkey 感谢您的帮助!
你应该打电话
$company = $newInstance->company()->get();
代替
$company = $newInstance->company();
在PageController:jobList
。
现在,您正在通过而不是相关数据来恢复关系本身。
或者,您可以将company
作为属性访问,该属性应自动返回相关数据而不是关系本身:
$company = $newInstance->company;
您需要在两个关系中同时指定foreignKey
和localKey
,因为您没有 id 作为主键
公司模式
public function jobs() {
return $this->hasMany('App\Joborder','company_id','company_id');
}
订单模型
public function company(){
return $this->belongsTo('App\Company', 'company_id', 'company_id');
}
现在像这样获取它
public function joblist() {
$joblist = Joborder::with('company')->all();
dd($joblist);
return view('pages.joblist')->with($joblist);
}
如果您需要获取公司的选定字段,则可以在预先加载$query->select('name', 'address');
指定它$query->select('name', 'address');
public function joblist() {
$joblist = Joborder::with(['company' => function($query){
$query->select('name', 'address');
}])->get();
return view('pages.joblist')->with($joblist);
}
在刀片中,您可以像这样访问公司数据
@foreach($joblist as $job)
@if($job->company)
{{$job->company->name}}
{{$job->company->address}}
@endif
@endforeach
尝试这样的事情
public function joblist() {
$joblist = Joborder::with('company')->get();
return view('pages.joblist')->with('jobs',$joblist);
}
确保公司表中有工作列表的 id。 还要检查外键名称,否则您必须传递joborder_id
或任何外键名称:
public function company(){
return $this->belongsTo('App\Company', 'joborder_id');
}
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