轉換原始查詢到Laravel雄辯

Question

如何該原始查詢轉換爲Laravel雄辯的語言：

select c.name as country from country c, address ad, city ci where 
ad.id = 1 and city.id = ad.city_id and c.code = ci.country_code 

Answer 1

First link

Second link

Query Builder

DB::table("country") 
->join('city', 'city.country_code', '=', 'country.user_id') 
->join('address', 'address.city_id', '=', 'city.id') 
->select('country.name as country') 
->where('address.id', 1) 
->get(); 

Eloquent

Country::with(['city','address' => function($query){ 
    return $query->where('id', 1) 
}]) 
->select('country.name as country') 
->get(); 

Answer 2

我將修改的答案從Andrey Lutscevich雄辯部分

Country::select('country.name as country')->has('city') 
    ->whereHas('address', function ($query) 
    { 
    $query->where('id', 1); 
    }) 
    ->get(); 

查詢關係存在 當訪問記錄的模型，你不妨基礎上，以限制搜索結果的關係的存在使用has在這種情況下

WhereHas methods put "where" conditions on your has queries