编辑页面不工作（未定义的变量分支）在 Laravel

Question

我的编辑页面包含 3 个字段 company、dealership、branch，当我单击其中一个分支的保存列表时，我需要在页面中显示详细信息，但是当我这样做时它显示未定义的变量错误抛出，如何解决这个问题，还需要在相应字段中列出详细信息后更新表单

编辑页面

 @include('theme.header')
<?php
use App\Company;
?>
<div class="page-content-wrapper ">

    <div class="container-fluid">

        <div class="row">
            <div class="col-sm-12">
                <div class="page-title-box">
                    <div class="btn-group float-right">

                    </div>
                    <h4 class="page-title">Branch Management</h4>
                </div>
            </div>
        </div>
        <!-- end page title end breadcrumb -->

        <div class="row">
            <div class="col-12">
                <div class="card m-b-30">
                    <div class="card-body">

                        <h4 class="mt-0 header-title">Branch</h4>
                        <br>
                        <br>
                        {!! Form::open(['method' => 'PUT', 'route' => ['branchs.update',$branch->id]] ) !!}
                            <div class="form-group row">
                                <label class="col-sm-2 col-form-label">Company</label>
                                <div class="col-sm-10">
                                    <?php
                                    $comp=Company::where('comp_id',$branch->comp_id)->first();

                                    $companies=Company::where('status','0')
                                        ->get();

                                    ?>
                                    <input type="hidden" name="br_id" id="br_id" value="{{$branch->br_id}}">
                                    <select class="form-control" id="company" name="company">
                                        <option selected value="{{$branch->br_id}}">{{$comp->name}}</option>
                                        @foreach($companies as $company)
                                            <option value="{{$company->comp_id}}">{{$company->name}}</option>
                                        @endforeach
                                    </select>
                                </div>
                            </div>
                            <div class="form-group row">
                                <label class="col-sm-2 col-form-label">Dealership</label>
                                <div class="col-sm-10">
                                    <?php
                                    $cn = App\Dealership::where('dlr_id', $branch->dlr_id)->first();

                                    $companies =App\Dealership::where('status', '0')
                                        ->get();

                                    ?>
                                    <select class="form-control" id="dealer" name=" dealer">
                                        <option>Select Dealership</option>
                                        @foreach($dealership as $dealerships)

                                            <option value="{{$dealerships->dlr_id}}">{{$dealerships->name}}</option>
                                        @endforeach

                                    </select>
                                </div>
                            </div>

                            <div class="form-group row">
                                <label for="example-text-input" class="col-sm-2 col-form-label">Branch Name</label>
                                <div class="col-sm-10">
                                    <input class="form-control" type="text" id="branch" name="branch" value="{{$branch->name}}">
                                </div>
                            </div>


                            <div class="row">
                                <div class="col-sm-12">
                                    <div class="page-title-box">
                                        <div class="btn-group float-right">
                                            <button class="btn btn-primary" type="submit">Button</button>
                                        </div>
                                    </div>
                                </div>
                            </div>

                        </form>


                    </div>
                </div>
            </div> <!-- end col -->
        </div> <!-- end row -->
    </div>
</div>
@include('theme.footer')

控制器文件

<?php

namespace App\Http\Controllers;

use App\Branch;
use App\Company;
use App\Dealership;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class BranchController extends Controller
{
        public function index()
    {
        $companies = Company::where('status', '0')->get();

        $dealership = Dealership::where('status', '0')->get();

        $branches = Branch::where('status', '0')->get();

    return view('branch.index', compact('branches'));

    }



    public function store(Request $request)
    {
        $branch_id = new Branch;
        $branch_id = Branch::orderBy('br_id', 'desc')->take(1)->get();
        if (count($branch_id) > 0) {
            $id = $branch_id[0]->br_id;
            $id = $id + 1;
        } else {
            $id = 1;
        }
        $branch = new Branch;
        $branch->br_id = $id;
        $branch->name = $request->input('branch');
        $branch->dlr_id = $request->input('dealer');
        $branch->comp_id = $request->input('company');
        $branch->created_id = '0';
        $branch->save();
        return redirect()->back()->with('message', 'Successfully saved');


    }



    public function edit(Branch $branch)
    {

        $branch=Branch::where('id',$branch->id)->first();
        return view('branch.edit',['branches'=>$branch]);
    }


    public function update(Request $request,$id)
    {
        $branch = Branch::findOrFail($id);
        $branch->status = '1';
        $branch->save();
        if ($branch) {
            $branchs = new Branch();
            $branchs->comp_id = $request->input('company');
            $branchs->dlr_id = $request->input('dealer');
            $branchs->name = $request->input('branch');

            $branchs->created_id = '0';

            $branchs->save();
            if ($branchs) {

                return redirect('/branch')->with('message', 'Successfully saved');
            }
        }
    }



    public function destroy(Branch $branch)
    {
        DB::table('branches')
            ->where('id', $branch->id)
            ->update(['status' => '-1']);
        return back()->with('message', 'Successfully Deleted');
    }


}

Answer 1

您正在传递参数名称 branches 的 branch。将您的控制器代码更改为：

 public function edit(Branch $branch)
{
    $branch=Branch::where('id',$branch->id)->first();
    return view('branch.edit',['branch'=>$branch]);
}

Answer 2

您正在从您的控制器发送 'branches' 并在您的视图中使用了 $branch！尝试在 edit() 函数中更改它，例如：

public function edit(Branch $branch)
{
   $branch=Branch::where('id',$branch->id)->first();
   return view('branch.edit',['branch' => $branch]);
}

此外，在您的 index() 函数中更改

return view('branch.index', compact('branches'));

到

return view('branch.index', compact(['branches', 'companies', 'dealership']));

希望对您有所帮助！

Answer 3

一切似乎都是正确的，只是你发送的是分支而不是分支，当视图查找分支时它不可用..这就是你得到的错误

编辑页面不工作（未定义的变量分支）在 Laravel

Edit page is not working(Undefinded variable branch) In Laravel

php

laravel

laravel-5.5

laravel-5.6