php - 'where 子句中的未知列 "has"

Question

我正在使用 laravel 5.7

当我使用 whereHas 检查关系是否存在时，我遇到了 Unknown column "has"in 'where clause 错误!为什么？

这是我的代码:

$query->whereHas('departures', function ( $query) {
    $query->whereBetween('depart_date', [date($this->data['departFrom_date']), date($this->data['departTo_date'])]);
});

这是我的模型部分:

    public function departures()
    {
        return $this->hasMany(CruiseSailingDepartures::class);
    }

更新:

查询开始于:

$query = DB::table('table_name');

Answer 1

建立外键和本地键的关系。

public function departures()
{
    return $this->hasMany('App\Model\CruiseSailingDepartures','foreign_key','local_key');
}

$res = BaseModel::find($id);
foreach($res->departures as $departures)
{
  echo $departures->name; //whatever field you have in CruiseSailingDepartures table
}