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Question

我很难从我的选择框中保存所选信息。我收到了消息：

＆＃34; SQLSTATE [23000]：完整性约束违规：1452无法添加或更新子行：外键约束失败（clientpad_notes。notebooks，CONSTRAINT notebooks_contact_id_foreign FOREIGN KEY（contact_id）REFERENCES contacts（id）ON DELETE CASCADE）（SQL：插入notebooks（name，contact_id，{{ 1}}，note_description，note_body，user_id，updated_at）值（assddsaasdadasasd，3，saS，

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，2 ，2018-03-03 19：18：51,2018-03-03 19:18:51）

我的问题是我正在从联系人表格中创建页面的信息。所以我将我的表与user_id的身份验证相关联，并且在notes表中我有contacts_id。我的目标是在创建新笔记时选择并保存通过其ID获取的联系人姓名。我有可能以错误的方式做这件事，我是Laravel的初学者，所以任何帮助都会受到赞赏。

这是我的笔记控制器并创建一个笔记页面。

NotesController.php

public function create（） {

created_at

create.blade.php

    $user_id = auth()->user()->id;
    $user = User::find($user_id);
    $contacts = Contact::find($user->contacts)->pluck('fullName');
    return view('notebooks.create')->with('contacts', $contacts)->with('user', $user);
}

/**
 * Store a newly created resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return \Illuminate\Http\Response
 */
public function store(Request $request)
{

    $this->validate($request,[
        'name' => 'required',
        'contact_id' => 'required',
        'note_description' => 'required',
        'note_body' => 'required',
    ]);

    //Create a note
    $notebook = new Notebook;
    $notebook->name = $request->input('name');
    $notebook->contact_id = $request->input('contact_id');
    $notebook->note_description = $request->input('note_description');
    $notebook->note_body = $request->input('note_body');
    $notebook->user_id = auth()->user()->id; //currently logged in user show their notes
    $notebook->save();

    return redirect('/dashboard')->with('success', 'Your Note Was Created');
}

在保存笔记的数据库中，我有这个：

                <div class="col-6 col-sm-3">
                        {{Form::label('contact_id', 'Choose your Contact')}}
                        {{Form::select('contact_id', $user->contacts->pluck('fullName'), $contacts, ['class' => 'form-control'])}}

                </div>
            </div>

Answer 1

在与其他表格中使用Id时，你犯了一个小错误。您应该检查目标表中是否确实存在该ID。

$this->validate($request,[
    'name' => 'required',
    'contact_id' => 'required|exists:contacts', //This will validate that the contact ID actually exists.
    'note_description' => 'required',
    'note_body' => 'required',
]);

//Create a note
$notebook = new Notebook;
$notebook->name = $request->input('name');
$notebook->contact_id = $request->input('contact_id');
$notebook->note_description = $request->input('note_description');
$notebook->note_body = $request->input('note_body');
$notebook->user_id = auth()->user()->id; //currently logged in user show their notes
$notebook->save();

Laravel validation#rule-exists

更新

$this->validate($request,[
    'name' => 'required',
    'contact_id' => 'required|exists:contacts,id', //check contacts table, for column ID
    'note_description' => 'required',
    'note_body' => 'required',
]);

Answer 2

经过大量搜索后我找到了解决方案。在Create中我必须使用映射：

public function create(Contact $contact)
{

    $user_id = Auth::user()->id;
    $user = User::find($user_id);
    $contacts = $user->contacts->mapWithKeys(function($contact){
        return [$contact->id => $contact->fullName];
    });
    // dd ($contacts);
    return view('notebooks.create')->with('contacts', $contacts)->with('user', $user);
}

然后在选择我刚刚呼吁：

   {{Form::label('contact_id', 'Choose your Contact')}}
   {{Form::select('contact_id', $contacts, null, ['class' => 'form-control'])}}

像魅力一样，以防其他人发现这个有用的

Laravel 5保存表单中的选定输入::选择

2 个答案:

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