問題描述
我正在嘗試在 Eloquent 中定義相同的兩個模型之間的 HasMany 和 HasOne 關系.
我的Organization類有很多Contact:
公共函數contacts(){返回 $this->hasMany(Contact::class);}同樣，我的 Contact 類反映了這種關系:
公共函數組織(){返回 $this->belongsTo(Organization::class);}而且，每個組織都有一個主要"聯系人.我正在使用表列 organizations.primary_contact_id 來確定哪個:
公共函數primaryContact(){返回 $this->hasOne(Contact::class, 'id', 'primary_contact_id');}從這里開始，我被卡住了.Contact 中的反向關系已經存在，所以我寫了另一個我認為可以解決問題的函數，計算如果我更新了父表中的值，Eloquent 自然會在contacts 表中獲取相應的記錄，因為我定義了關系:
/*** @param AppContact*/公共函數 setPrimaryContact($contact){$this->primary_contact_id = $contact->id;$this->save;}但它沒有:
<預><代碼>>>>$org = 組織::查找(17)=>應用組織 {#2923編號:17，name: "測試組織",primary_contact_id: 33,}>>>$alice= $org->primaryContact=>應用聯系{#2938編號:33，組織 ID:17，fname: "愛麗絲",lname: "方丈",}>>>$bob = 聯系人::查找(34)=>應用聯系{#2939編號:34，組織 ID:17，fname: "鮑勃",lname: "面包師",}>>>$org->setPrimaryContact($bob)=>空值>>>$org=>應用組織 {#2923編號:17，name: "測試組織",primary_contact_id: 34,主要聯系人:AppContact {#2938編號:33，組織 ID:17，fname: "愛麗絲",lname: "方丈",},}您可以看到 setPrimaryContact($bob) 執行得很好，因為 primary_contact_id 已更新為 Bob 的 id，但是 primaryContact 仍然列出 Alice.
為什么 primaryContact 沒有返回正確的對象?
- 您的
setPrimaryContact方法不會更新您的表，因為您調用的是$this->save，而不是$this->save(),save是一個方法 - 在
$org->setPrimaryContact($bob)之后，你應該調用$org->primaryContact->refresh()以獲取更新的記錄.
I'm trying to define both a HasMany and HasOne relationship between the same two models in Eloquent.
My Organization class has many Contacts:
public function contacts()
{
return $this->hasMany(Contact::class);
}
And likewise, my Contact class reflects this relationship:
public function organization()
{
return $this->belongsTo(Organization::class);
}
But also, each Organization has exactly one "primary" Contact. I am using a table column organizations.primary_contact_id to identify which one:
public function primaryContact()
{
return $this->hasOne(Contact::class, 'id', 'primary_contact_id');
}
From here, I'm stuck. The reverse relationship in Contact already exists, so I wrote another function I thought would do the trick, figuring if I updated the value in the parent table, Eloquent would naturally fetch the corresponding record in the contacts table since I defined the relationship:
/**
* @param AppContact
*/
public function setPrimaryContact($contact)
{
$this->primary_contact_id = $contact->id;
$this->save;
}
But it doesn't:
>>> $org = Organization::find(17)
=> AppOrganization {#2923
id: 17,
name: "Test Org",
primary_contact_id: 33,
}
>>> $alice= $org->primaryContact
=> AppContact {#2938
id: 33,
organization_id: 17,
fname: "Alice",
lname: "Abbot",
}
>>> $bob = Contact::find(34)
=> AppContact {#2939
id: 34,
organization_id: 17,
fname: "Bob",
lname: "Baker",
}
>>> $org->setPrimaryContact($bob)
=> null
>>> $org
=> AppOrganization {#2923
id: 17,
name: "Test Org",
primary_contact_id: 34,
primaryContact: AppContact {#2938
id: 33,
organization_id: 17,
fname: "Alice",
lname: "Abbot",
},
}
You can see setPrimaryContact($bob) executed fine, as primary_contact_id got updated to Bob's id, but primaryContact still lists Alice.
Why is primaryContact not returning the correct object?
- Your
setPrimaryContactmethod won't update your table, because you call$this->save, not$this->save(),saveis a method - After
$org->setPrimaryContact($bob), you should call$org-> primaryContact->refresh()to get the updated record.
這篇關于當同一模型也存在 HasMany 關系時，如何更新 HasOne 關系?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！