雄辩的 ORM | Laravel 的 hasMany（多于 1）关系

Question

Stackoverflow!

I'm usign Laravel. The question is about relations in Eloquent.

Item might have 1 or more than 1 types.

---

Item.php:

public function types() 
{
    return $this->hasMany('App\Type');
}

---

Type.php:

public function items() 
{
    return $this->belongsToMany('App\Item');
}

---

Item table:

id
name

---

Type table:

id
name

---

The question

I have 4 types. Item №1 has 2 types, Item №2 has 1 type. How should I store item types in database?

Answer 1

You need to define two belongsToMany() relationships. In the Item model:

public function types() 
{
    return $this->belongsToMany('App\Type');
}

And in the Type model:

public function items() 
{
    return $this->belongsToMany('App\Item');
}

Also, create the item_type pivot table.

To work with this many-to-many relationship use the attach() , detach() and sync() methods.