Laravel Models&关系

时间:2015-12-15 10:54:59

标签: laravel eloquent models relationships

我尝试在用户和债券之间建立关系。一个债券总是包含两个用户(债务人,债权人)。

最后,如果我致电$bond->debtor$bond->creditor

,我想获得一个用户模型

用户模型:

public function bonds()
{
    return $this->hasMany(Bond::class);
}

债券模型:

protected $fillable = ['description', 'amount', 'debtor_id', 'creditor_id'];

public function debtor()
{
    return $this->belongsToMany(User::class, 'bond_user', 'debtor_id', 'user_id');
}

public function creditor()
{
    return $this->belongsToMany(User::class, 'bond_user', 'creditor_id', 'user_id');
}

两次迁移:

Schema::create('bonds', function (Blueprint $table) {
        $table->increments('id');
        $table->text('description');
        $table->float('amount', 8, 2);
        $table->integer('debtor_id');
        $table->integer('creditor_id');
        $table->timestamps();
    });

Schema::create('bond_user', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id');
        $table->integer('debtor_id');
        $table->integer('creditor_id');
        $table->timestamps();
    });

每当我打电话的时候。 $bond->debtor我得到一个整数而不是用户模型。

更新

我找到了解决方案:

用户模型:

public function bond_debtor()
{
    return $this->hasMany(Bond::class, 'debtor_id');
}

public function bond_creditor()
{
    return $this->hasMany(Bond::class, 'creditor_id');
}

债券模型:

public function debtor()
{
    return $this->belongsTo(User::class, 'debtor_id');
}

public function creditor()
{
    return $this->belongsTo(User::class, 'creditor_id');
}

1 个答案:

答案 0 :(得分:0)

设置关系时,您需要

  1. 将参考列的字段类型设置为integerunsigned

    $table->integer('debtor_id')->unsigned();
    $table->integer('creditor_id')->unsigned();
    
  2. 使用foreign Table方法设置关系:

    $table->foreign('debtor_id')
        ->references('id')->on('user');
    $table->foreign('creditor_id')
        ->references('id')->on('user');
    
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