1.所有relation都由model class上的方法来定义; 2. relationship和model本身都是以query builder作为基类的,因此对relation的操作也可以使用类似query builder的方法,比如:可以支持级联; 3.Dynamic property of model:这是 model->relation方式引用的结果,这种方式直接返回relation model的value,不支持query builder的级联...
2. relationship和model本身都是以query builder作為基類的,因此對relation的操作也可以使用類似query builder的方法,比如:可以支援級聯; 3.Dynamic property of model:這是 model->relation方式引用的結果,這種方式直接返回relation model的value,不支援query builder的級聯操作,這是和model->relation()方法呼叫的本質區別。
*/publicfunctiongetRelationValue($key){// If the key already exists in the relationships array, it just means the// relationship has already been loaded, so we'll just return it out of// here because there is no need to query within the relations twice.if($this->relationLoaded($key)){...
Laravel提示:Call to undefined relationship [xxx] on model [xxx]?错误,如图: 产生这种错误的原因一般是代码存在编写错误,仔细检查一下代码找到错误的地方即可。仅以我的错误举例: 错误代码: $bj = Bjdm::with(['xss.xb,xy,zy'])->find($id); 正确代码: $bj = Bjdm::with(['xss.xb','xy','zy...
The many to many relationship methods. from HasRelationships static protected array $relationResolvers The relation resolver callbacks. from HasRelationships bool $timestamps Indicates if the model should be timestamped. from HasTimestamps protected array $hidden The attributes that should be hidden ...
对于你的问题“为什么你要把它们分开”--为了保持它们的整洁和对基本模型(时间表)的控制，我个人会把...
useIlluminate\Database\Eloquent\Model; classTenantextendsModel { /** * Get the rent of a Tenant */ publicfunctionrent() { return$this->hasOne(Rent::class); } } 因为eloquent根据父模型的名称(本例中是Tenant)来确定外键关联,Rent模型假定存在一个tenant_id外键。
通过上面代码看到创建HasMany实例时主要是做了一些配置相关的操作,设置了子模型、父模型、两个模型的关联字段、和关联的约束。 Eloquent里把主体数据的Model称为父模型,关联数据的Model称为子模型,为了方便下面所以下文我们用它们来指代主体和关联模型。 定义完父模型到子模型的关联后我们还需要定义子模型到父模型的反...
return $this->hasOne('App\Phone'); } }The first argument passed to the hasOne method is the name of the related model. Once the relationship is defined, we may retrieve the related record using Eloquent's dynamic properties. Dynamic properties allow you to access relationship methods as if...
Describe the bug When using Laravel Nova to attach a model to a hasMany relationship, it doesn't invalidate the cache, and the new model doesn't show up until it's manually cleared. Eloquent Query Please provide the complete eloquent que...