使用 Laravel 5.2.45
总的来说，我对 Laravel 和 PHP 相当陌生，所以我正在制作一个电话簿项目，在其中存储有关人员的联系信息。
我的数据库中有一个名为“联系人”的表，名为“电话簿”。
我有一个带有表单的视图，用于记录此表中的新条目。
这是视图：
电话簿.blade.php
....... CSS and stuff here .......
<body>
<h1> Contact Form </h1><br/>
{{-- FORM --}}
<form method = "POST" action = "contacts">
{{ csrf_field() }}
<div class = "form-group
@if($errors->has('name'))
has-error
@endif">
<label for = "name"> Name </label><br/>
<input type = "text" id = "name" class = "form-control" name = "name" placeholder = "Name your Name" value = "{!! old('name') !!}">
@if($errors->has('name'))
<p class = "help-block">{{ $errors->first('name') }}</p>
@endif
</div><br/>
<div class = "form-group
@if($errors->has('lastname'))
has-error
@endif">
<label for = "lastname"> Lastname </label><br/>
<input type = "text" id = "lastname" class = "form-control" name = "lastname" placeholder = "Name your Lastname" value = "{!! old('lastname') !!}">
@if($errors->has('lastname'))
<p class = "help-block">{{ $errors->first('lastname') }}</p>
@endif
</div><br/>
<div class = "form-group
@if($errors->has('email'))
has-error
@endif">
<label for = "email"> E-mail </label><br/>
<input type = "text" id = "email" class = "form-control" name = "email" placeholder = "[email protected]" >
@if($errors->has('email'))
<p class = "help-block">{{ $errors->first('email') }}</p>
@endif
</div><br/>
<div class = "form-group
@if($errors->has('phone'))
has-error
@endif">
<label for = "phone"> Phone Number </label><br/>
<input type = "text" id = "phone" class = "form-control" name = "phone" placeholder = "I'll call you">
@if($errors->has('phone'))
<p class="help-block">{{ $errors->first('phone') }}</p>
@endif
</div><br/>
<div class = "form-group">
<label for = "address"> Address </label><br/>
<input type = "text" id = "address" class = "form-control" name = "address" placeholder = "I'll even visit you" value = "{!! old('address') !!}">
</div><br/>
<div>
<button type = "submit" class = "submit"> Submit Information </button>
<a href="contacts"><button type = "button"> View Contacts </button></a>
</div>
</form>
</body>
</html>
当我记录新条目时，我会被重定向到可以看到表格的视图。 以简单的方式构建，这就是视图：
contacts.blade.php
....... CSS and stuff here .......
<body>
<h1> Contacts </h1>
<br/>
<div>
<a href = "phonebook"><button class = "ret" type = "button"> Add New Entry </button></a>
</div>
<br/><br/>
<table class = "contacts">
<thead>
<tr>
<th> ID </th>
<th> Name </th>
<th> Lastname </th>
<th> E-Mail </th>
<th> Phone </th>
<th> Address </th>
<th> Edit </th>
<th> Delete </th>
</tr>
</thead>
<tbody>
@foreach($contact as $contact)
<tr class = "tableBody">
<td class = "id"> {{ $contact->id }} </td>
<td class = "name"> {{ $contact->name }} </td>
<td class = "lastname"> {{ $contact->lastname }} </td>
<td class = "email"> {{ $contact->email }} </td>
<td class = "phone"> {{ $contact->phone }} </td>
<td class = "address"> {{ $contact->address }} </td>
<td class = "edit"> <a href = "edit"> Edit </a> </td>
<td class = "delete"> <a href = "delete"> Delete </a> </td>
</tr>
@endforeach
</tbody>
</table>
<br/>
<div>
<a href = "phonebook"><button class = "ret" type = "button"> Add New Entry </button></a>
</div>
</body>
</html>
注意，您会看到我的表中有一个删除链接，我想用它来删除该给定行中的记录。
为此，我有一个删除视图，该视图在
destroy()这是我的routes.php 文件，带有注释
routes.php
<?php
use Illuminate\Support\Facades\Input;
use App\Contact;
use App\Http\Controllers;
// default welcome view from Laravel
Route::get('/', function ()
{
return view('welcome');
});
// getting the routes from the controller
Route::resource('contacts', 'ContactsController');
// getting the form from the controller, which is in a .blade.php view
Route::get('phonebook', 'ContactsController@index');
// showing the table in a .blade.php view
Route::get('contacts', 'ContactsController@tab');
// the route to post the contact in the table, using the form in the phonebook.blade.php
Route::post('contacts', 'ContactsController@create');
// routing to the destroy function in my controller
Route::get('delete', [
'as' => 'delete', 'uses' => 'ContactsController@destroy'
]);
// getting the edit.blade.php, not working
// permeate the inputs of name, lastname, email, phone and address
// with the same inputs we have in the row of our table
Route::get('edit', function()
{
return view('edit');
});
也许错误在我的路线中，这就是为什么我也将其粘贴到这里。
总体而言，这是我的控制器
ContactsController.php 带注释
<?php
namespace App\Http\Controllers;
use App\Contact;
use DB;
use Illuminate\Http\Request;
use App\Http\Requests;
use Illuminate\Support\Facades\Input;
use Validator;
class ContactsController extends Controller
{
// showing the form in the phonebook.blade.php
// the form is structured using html and stuff
public function index()
{
return view('phonebook');
}
// showing the table where I save my contacts
// simple view stuff
public function tab()
{
return view('contacts');
}
// the parameters to save my contact, with errors and stuff
//working since day one
public function create()
{
$rules = array(
'name' => 'alpha|min:3|max:15|required',
'lastname' => 'alpha|min:3|max:15',
'email' => 'required|unique:contacts,email|email',
'phone' => 'required|unique:contacts,phone|alpha_num|between:3,25',
'address' => 'max:255',
);
$messages = array(
'alpha' => 'The :attribute must contain only letters.',
'max' => 'The :attribute must have a maximum of 15 letters.',
'min' => 'The :attribute must have at least 3 characters.',
'required' => 'The :attribute is really important. We are storing your contact info after all...',
'email' => 'The :attribute must be a valid e-mail format address.',
'numeric' => 'The :attribute must contain only numbers.',
'between' => 'The :attribute content must have a lenght between 3 and 25 characters.',
);
$validator = Validator::make(Input::all(), $rules, $messages);
if ($validator->fails())
{
$messages = $validator -> messages();
return redirect('phonebook')
->withInput()
->withErrors($validator);
}
else
{
$contact = new Contact;
$contact-> name = Input::get('name');
$contact-> lastname = Input::get('lastname');
$contact-> email = Input::get('email');
$contact-> phone = Input::get('phone');
$contact-> address = Input::get('address');
$contact->save();
// $contact = App\Contact::all();
return view('contacts', compact('contact'));
};
}
我也有编辑功能，但不起作用，但我不关心它。
我用多种方式编辑了我的销毁函数。
我现在将它们列在这里，包括评论和它们返回的错误。
由于每个函数都应该返回
delete.blade.php销毁功能1
//error: undefined variable in the findOrFail()
$contact = Contact::findOrFail($contact);
$contact->delete();
与我想在 findOrFail() 中传递的参数无关，无论是 $id、$name 还是唯一的 $phone 或 $email，错误与代码注释中提到的相同。
销毁功能2
//FatalErrorException in ContactsController.php line 93:
//Class 'App\Http\Controllers\Contacts' not found
Contacts::where('id','=',$id);
$id->delete();
在这一篇和下一篇中，我什至不知道如何摆脱这个错误。
销毁功能3
//Same error as above
//Class not found
$contact = Contacts::where('id', '=', $id);
$contact->delete();
接下来，我添加了一个
if销毁功能4
//Class contacts not found
$id = contacts::where('id', $id)->first();
if ($id != null) {
$id->delete();
return view('delete');
}else{
return view('delete')->with(['message'=> 'Contact not found']);
};
下一个返回一个我不明白的错误。
销毁功能5
//Call to a member function delete() on null
//I don't know what that is supposed to mean
$id = Contact::all();
Contact::find($id) -> delete();
现在，下一段代码感觉是最好的，因为它返回删除视图，但没有删除我表中的条目，甚至没有使用forceDelete()。
销毁功能6
//loading the view page, but not deleting the entry
// not even using forceDelete()
Contact::where('id', '=', '$id')
-> where('name', '=', '$name')
-> delete();
最后，我想，只是为了好玩，我发布了下一行代码，当我单击表中的删除链接时，该代码会关闭我的服务器
//This line destroys my local server
//I have to up it again, using art serve command line
// $this -> destroy(Contact::get());
所以，我在使我的销毁功能正常工作时遇到了麻烦。
这就是我需要的
我需要对我的函数进行一些更正，只要对其中一个函数进行一次更正，我就会非常高兴。 重申一下，这些函数都不起作用，每个函数都会返回某种错误，正如您在代码本身提供的注释中看到的那样。
就像我之前说的，我认为 destroy 函数 6 是可行的，因为它返回我想要的视图，它只是不删除我在表中的条目。
另外，我发布了所有这些代码，因为也许错误是从后面一路传来的。
可以随意索取其他文件，例如模型、迁移等。
编辑
这是我的联系方式：
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Contact extends Model
{
// not using an id field
// could this be the error?
// isn't laravel making an automatic id field?
// dunno
public $fillable = array('name', 'lastname', 'email', 'phone', 'address');
//added because of error at migration
public $timestamps = false;
}
正如代码中注释的那样，我必须为
falsetimestamps现在，这是一种有效的方法。
我采用了第一个销毁函数并将其应用到我的代码中。
错误还是一样，findOrFail()
所以，我定义了这个变量，我不知道这是否是常见的做法。 这是它的样子。
$contact=Contact::first();
Contact::find($contact->id);
$contact->delete();
但是，这段代码删除了我表中的第一个条目，与我单击删除按钮的位置无关，这是有道理的，那里是一个first()。
那么，既然这是一种工作，我应该使用什么语句来让它删除我想要的条目？
结束编辑
很抱歉问题中的代码过多。 提前谢谢大家。
** 编辑 **
您需要更新“删除”按钮所在的刀片模板，以将联系人 ID 作为 url 的一部分传递
<tbody>
@foreach($contact as $contact)
<tr class = "tableBody">
<td class = "id"> {{ $contact->id }} </td>
<td class = "name"> {{ $contact->name }} </td>
<td class = "lastname"> {{ $contact->lastname }} </td>
<td class = "email"> {{ $contact->email }} </td>
<td class = "phone"> {{ $contact->phone }} </td>
<td class = "address"> {{ $contact->address }} </td>
<td class = "edit"> <a href = "edit"> Edit </a> </td>
<td class = "delete"> <a href = "delete/{{ $contact->id }}"> Delete </a> </td>
</tr>
@endforeach
</tbody>
然后更新您的删除路线以将 id 包含在 url 中
Route::get('delete/{id}', [
'as' => 'delete', 'uses' => 'ContactsController@destroy'
]);
然后让你的控制器销毁方法接受id
public function destroy($id)
{
$contact = Contact::findOrFail($id);
$contact->delete();
}
原版
对此使用 $contact->id。 findOrFail 需要传递 id。
销毁功能1
//error: undefined variable in the findOrFail()
$contact = Contact::findOrFail($contact->id);
$contact->delete();
销毁功能2
似乎您没有 Contacts 类的导入语句。检查 Contacts 类的命名空间，并将其添加到控制器类的顶部，如下所示：
use App\Contact;
$contact = Contact::where('id','=',$id)->get();
$contact->delete();
或
Contact::destroy($id);
销毁功能3
同上。添加导入/使用语句。
//Same error as above
//Class not found
$contact = Contact::where('id', '=', $id)->get();
$contact->delete();