Laravel雄辩的关系 - hasOne？

Question

我有一个问题表，它有一个type_id列。此处定义的值与QuestionTypes模型相关。

问表：

-------------------------- 
| 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 | 
---------------- 

在问题型号我：

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

我想打印从questiontypes表标题，但是当我尝试使用$question->type->title在视图中输出我得到：

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 

我混淆了关系吗？

Answer 1

解决方案通过Attaching a hasOne model to another Laravel/Eloquent model without specifying id

更新到问题型号：

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

加入QuestionType型号：

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