雄辩的morphOne关系不限于一个关系 [英] Eloquent morphOne relationship doesn't limit to one relation

问题描述

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$ p $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

基本上我有一些模型（例如，让我们说 Person 和 Building ）都需要一个位置，所以我创建了一个位置模型：

  class Location Enloquent {
 
 public function locationable（）
 {
 return $ this-> morphTo（）; 
} 
 
} 
  

然后在我的其他模型中这个：

  class Person extends Eloquent {
 
 // ... 
 
 / ** 
 *获取该人的位置
 * 
 * @return位置
 * / 
 public function location（）
 {
 return $ this-> morphOne（'Location'，'locationable'）; 
} 
 
 // ... 
  

  class Building Enloquent {
 
 // ... 
 
 / ** 
 *获取建筑物的位置
 * 
 * @return位置
 * / 
 public function location（）
 {
 return $ this-> morphOne（'Location' ，可定位）; 
} 
 
 // ... 
  

当我运行以下测试代码，它创建位置条目罚款，但如果我重复，它会创建更多的条目。

  $ person =人::第一（）; 
 
 $ loc = new位置; 
 
 $ loc-> lat =123; 
 $ loc-> lng =321; 
 
 $ person-> location（） - > save（$ loc）; 
  

我在这里做错什么？我会预期 morphOne 将其限制为每个类型的一个条目，因此下表中的最后一个条目不应该存在：

  + --------------------- + -------------- ------------ + 
 | locationable_id | locationable_type | 
 + --------------------- + ----------------------- --- + 
 | 2 |建筑| 
 | 3 |建筑| 
 | 2 |人| 
 | 2 |建筑| 
 + --------------------- + ----------------------- --- + 
  

解决方案

实际上，通过调用

  $ loc = new Location; 
  

根据定义，您将创建一个新的位置！

调用

  $ person-> location（） - > save（$ loc）; 
  

没有帮助。

如果要更新某个位置，则需要找到该位置，更新它的值，然后保存。独立于父模型：

  $ person = Person :: first（）; 
 
 $ loc = $ person-> location; 
 
 $ loc-> lat =123; 
 $ loc-> lng =321; 
 
 $ loc-> save（）; 
  

完成。

I am having a issue with an Eloquent morphOne relationship where it is creating new entries rather than updating the one that already exists.

Basically I have a number of models (for example, let's say Person and Building) that both need a location, so I have created a Location model:

class Location extends Eloquent {

    public function locationable()
    {
        return $this->morphTo();
    }

}

Then in my other models I have this:

class Person extends Eloquent {

    // ...

    /**
     * Get the person's location
     * 
     * @return Location
     */
    public function location()
    {
        return $this->morphOne('Location', 'locationable');
    }

    // ...

class Building extends Eloquent {

    // ...

    /**
     * Get the building's location
     * 
     * @return Location
     */
    public function location()
    {
        return $this->morphOne('Location', 'locationable');
    }

    // ...

When I run the following test code, it creates the location entry fine, but if I repeat it, it creates more entries.

$person = Person::first();

$loc = new Location;

$loc->lat = "123";
$loc->lng = "321";

$person->location()->save($loc);

Am I doing something wrong here? I would have expected morphOne to constrain this to one entry per type, so the last entry in the table below should not exist:

+---------------------+--------------------------+
|  locationable_id    |   locationable_type      |
+---------------------+--------------------------+
|  2                  |  Building                |
|  3                  |  Building                |
|  2                  |  Person                  |
|  2                  |  Building                |
+---------------------+--------------------------+

解决方案

Actually, by calling

$loc = new Location;

you are, by definition, creating a new location!

Calling

$person->location()->save($loc);

doesn't help either.

IF you want to update a location, you need to find the location, update it's values and then save it. Independently from the parent model:

$person = Person::first();

$loc = $person->location;

$loc->lat = "123";
$loc->lng = "321";

$loc->save();

Done.

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