Laravel 5与表单绑定有一种关系 [英] Laravel 5 Has One Relationship with Form Binding

问题描述

我花了相当不错的两天时间来做一件简单而又小的事情.我有一个名为User的模型，它具有一个用户注释关系.

I have spent a pretty good two days on something so simple and small. I have a model called User which has one user note relationship.

在用户模型侧，我定义了一个belongsTo关系，然后用户模型定义了一个hasOne关系.

On the User model's side I have a belongsTo relationship defined and then the user's model defines a hasOne side of relationship.

我正在使用的表单绑定到$user模型，而UserNote模型有自己的表，该表映射到具有user_id的用户.

The form I am using binds to $user model meanwhile the UserNote model has its own table that maps to the user with user_id.

我一直在尝试获取右下方显示的内容；

I have been trying to get what is shown below right;

{{ Form::textarea($user->notes, null , [ 'class' => 'form-control', 'placeholder' => 'Note Content']) }}

有人在那里帮助我解决这个问题吗?b我所需要的只是能够添加便笺，并且如果用户还没有便笺，我应该不会收到错误提示，因为如果我按如下所示操作，则会收到错误提示:

Somebody out there to help me figure this out?b All I need is to be able to add a note and if a user has no note yet I should not be getting errors because if I do as shown below I get an error:

{{ Form::textarea('UserNote[content]',... }}

您的建议将不胜感激.

class User{
 ...
 public function note()
 {
    return $this->belongsTo(UserNote::class);
  }
}

class UserNote{
 protected $fillable = ['content', 'user_id'];
...
public function user()
{
    return $this->hasOne(User::class, 'user_id');
  }
}

当然不应该首先在$fillable中使用user_id，因为这仅意味着我可以手动更新此表，而我希望从控制器自动完成所有工作以形成表单绑定.

Surely the user_id in $fillable shouldn't be there in the first place because this only means I can update this table manually whereas I want everything done automatically from controller to form binding.

推荐答案

首先，您做错了关系.

First of all, you're doing the relationship wrong.

• 用户有一个UserNote
• UserNote属于用户

• User hasOne UserNote
• UserNote belongsTo User

因此，您必须交换那些相应模型上的关系.
其次，表单的文本区域具有如下参数列表:

So, you've to swap the relations on those corresponding models.
Secondly, The form's textarea has the parameter list like:

public function textarea($name, $value = null, $options = []){}

因此，第一个参数显然是 form_name .第二个参数将是输入的值.您做错了.
就您而言，这应该是(我认为)

So, the first parameter is obviously the form_name. second parameter will be the value of the input. You're doing this wrong.
In your case, that should be ( as I think )

{{ Form::textarea('user_note', $user->note , [ 'id' => 'user_note', 'class' => 'form-control', 'placeholder' => 'Note Content']) }}

修改
属性 note 是方法名称，您之前写的像 notes 一样，该方法不存在. 编辑结束
希望这可以帮助.编码愉快！

Edit
The property note is the method name, you're previously writing like notes, the method didn't exist. Edit Ends
Hope this helps. Happy coding!

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