Laravel - 如何设置 morphOne 关系
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Laravel - How to setup a morphOne relationship
提问by Big Boss
I'm trying to implement a morphable table for categories, right now I've the following.
我正在尝试为类别实现可变形表，现在我有以下内容。
// Snippet Table
- id
- title
- body
// Post Table
- id
- title
- body
// Category Table
- id
- name
I want to be able to morph the posts and snippets to have only one category, something like this:
我希望能够将帖子和片段变形为只有一个类别，如下所示：
// Categorizable Table
- category_id
- categorizable_id
- categorizable_type
Do I have to have another model for this categorizable table? Or there is a way to set it without another model?
我是否必须为这个可分类表提供另一个模型？或者有一种方法可以在没有其他模型的情况下进行设置？
So far I have this
到目前为止我有这个
class Snippet extends Model
{
public function category()
{
return $this->morphOne(Category::class, 'categorizable');
}
}
class Post extends Model
{
public function category()
{
return $this->morphOne(Category::class, 'categorizable');
}
}
class Category extends Model
{
public function categorizable()
{
return $this->morphTo();
}
}
And I have 4 tables, snippets, posts, categories, categorizables, the last one the migration looks like this.
我有 4 个表，snippets, posts, categories, categorizables，最后一个迁移看起来像这样。
Schema::create('categorizables', function (Blueprint $table) {
$table->increments('id');
$table->unsignedInteger('category_id');
$table->morphs('categorizable');
$table->timestamps();
});
The thing is, what is the correct way to save this relationship, I'm testing it on tinker and bothattach($category_id)and sync($category_id)aren't saving the relationship they return the error BadMethodCallException with message 'Call to undefined method Illuminate\Database\Query\Builder::categorizable()', What I'm missing?
问题是，保存这种关系的正确方法是什么，我正在 tinker 和两者上进行测试，attach($category_id)并且sync($category_id)没有保存他们返回错误的关系BadMethodCallException with message 'Call to undefined method Illuminate\Database\Query\Builder::categorizable()'，我错过了什么？
回答by yazfield
Sorry I thought you wanted many-to-many relationship. morphOnerelationship API is the same as morphManyfrom the docs
抱歉，我以为你想要多对多的关系。morphOne关系 APImorphMany与文档中的相同
Post extends Model
{
public function category() {
return $this->morphOne(Category::class, 'categorizable');
}
}
Category extends Model
{
public function categorizable() {
return $this->morphTo();
}
}
EDITWhen using morphOne you don't need a pivot table categorizablestable must be deleted and change your categoriestable to include the morph fields
编辑使用 morphOne 时，您不需要数据透视categorizables表必须删除并更改您的categories表以包含变形字段
// Category Table
- id
- name
- categorizable_id
- categorizable_type
