Laravel雄辯的關係 - hasOne？

Question

我有一個問題表，它有一個type_id列。此處定義的值與QuestionTypes模型相關。

問表：

-------------------------- 
| id | title | type_id | 
-------------------------- 
| 1 | apple? | 2  | 
| 3 | banana? | 2  | 
| 4 | kiwi? | 2  | 
| 5 | pear? | 3  | 
-------------------------- 

QuestionTypes

---------------- 
| id | title | 
---------------- 
| 1 | multi | 
| 2 | single | 
| 3 | free | 
---------------- 

在問題型號我：

public function type() 
{ 
    return $this->hasOne(QuestionType::class); 
} 

我想打印從questiontypes表標題，但是當我嘗試使用$question->type->title在視圖中輸出我得到：

Column not found: 1054 Unknown column 'x__questiontypes.questions_id' in 'where clause' 
(SQL: select * from `x__questiontypes` where `x__questiontypes`.`questions_id` = 2 and `x__questiontypes`.`questions_id` is not null limit 1 

我混淆了關係嗎？

Answer 1

解決方案通過Attaching a hasOne model to another Laravel/Eloquent model without specifying id

更新到問題型號：

public function type() 
{ 
    return $this->belongsTo(QuestionType::class, 'type_id'); 
} 

加入QuestionType型號：

public function questions() 
{ 
    return $this->hasMany(Question::class, 'type_id'); 
}