访问具有一对多关系的儿童属性

Question

我有模型Member，Loan和Interestamount。Loan与Interestamount具有hasMany的关系。我似乎无法从Interestamount访问数据。

我可以在刀片中显示贷款id和Interestamount，但不能为给定的Loan整理Interestamount。

loancontroller.php

public function loanInterest($criteria){
    //$loanData = Loan::all();
    $loanData =Loan::findOrFail($criteria);
    return view($this->_pagePath.'loan.loaninterest',compact('loanData'));
}

web.php

Route::any('loaninterest/{criteria?}','LoanController@loanInterest')
    ->name('loaninterest');

loan.php

use IlluminateDatabaseEloquentModel;
class Loan extends Model
{
    protected $fillable = [
        'amount',
        'interest',
        'status',
        'duration',
        'member_id',
        'loan_type_id',
        'interest_type_id',
        'loan_payment_type_id'
    ];
    // protected $appends = 'interest_amount
    public function getInterestAmountAttribute()
    {
        return ($this->amount)/100 * $this->interest;
    }
    public function interestamount()
    {
        return $this->hasMany(InterestAmount::class,'loan_id','id');
    }
}

iSPERYAMONT.PHP

use IlluminateDatabaseEloquentModel;
class InterestAmount extends Model
{
    protected $fillable = ['interestamount'];
    public function loan()
    {
        return $this->belongsTo(Loan::class,'loan_id','id');
    }
}

loaninterest.blade.php

<tr>
    <td>{{$loanData->member->name}}</td>
    @foreach($loanData->interestamount() as $int)
        <td>{{$int->interestamount}} </td>
    @endforeach     
</tr>

loan.blade.php

<a href="{{route('loaninterest', $loan->id) }}">Interest detail</a>

Answer 1

$loanData->interestamount()返回查询构建器实例而不是查询结果。

有几种方法可以从关系功能中获得结果。

其中之一是调用get()功能

exmaple

$loanData->interestamount()->get();

另一种方法是调用关系功能not as a function but as a property

示例

$loanData->interestamount;

所以在刀片文件中 @foreach()

@foreach($loanData->interestamount as $int)
    <td>{{$int->interestamount}} </td>
@endforeach 

Answer 2

将您的贷款兴趣更改为此

<td>{{$loanData->member->name}}</td>
  @foreach($loanData->interestamount as $int)
   <td>{{$int->interestamount}} </td>
  @endforeach     
</tr>

当我们使用$loanData->interestamount()时，它是指查询构建器，但是当我们使用$loanData->interestamount时，它将返回与$loanData->interestamount()->get()

Answer 3

我不知道原因，但是我这样做了。

  <td>{{$loanData->member->name}}</td>
  @foreach($loanData->interestamount()->get() as $int)
 <td>{{$int->interestamount}} </td>
  @endforeach