Question

我要更新所选的下拉值并将其保存到数据库

在此代码中，我无法从数据库更新下拉列表值

我的控制器代码

for(String[] strArr : manyWords){
   for(String str : strArr){
       System.out.println(str.substring(0,1);}}

我的查看代码

    public function edit($product_id)
    {
        $all_categories = DB::table('tbl_category')->get();
        $all_manufactures = DB::table('tbl_manufacture')->get();

        $product =  DB::table('tbl_product')
            ->where('product_id',$product_id)
            ->get()->first();

        return View('admin.edit-product')->with([
            'product'=>$product,
            'all_categories'=>$all_categories,
            'all_manufactures'=>$all_manufactures,
            ]);
    }

Answer 1

编辑方法显示用于编辑的表单。

/**
 * Show the form for editing the specified resource.
 *
 * @param \App\User $user
 * @return \Illuminate\Http\Response
 */
public function edit(User $user)
{
    $roles = Role::all();

    return view('admin.users.form', [
        'roles' => $roles,
        'user' => $user
    ]);

}

您需要更新方法

/**
     * Update the specified resource in storage.
     *
     * @param \Illuminate\Http\Request $request
     * @param \App\User $user
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        $user = User::find($id);

        $user->update($request->all());

        $role = Role::findOrFail($request->roles);

        $user->syncRoles([$role->id]);

        return redirect()->route('users.index');
    }

查看

<form action="{{route('users.update', $user->id)}}" method="post">
     @csrf
     @method('PUT')
 <select class="custom-select" name="roles">
    @if ($roles)
      @foreach($roles as $role)
         <option {{ ((old('roles') == $role->id) or (isset($user) and $user->roles->pluck('id')->contains($role->id)) ) ? 'selected' : null }} value="{{$role->id}}">{{$role->display_name}}</option>
      @endforeach
    @endif
 </select>
</form>

如何使用Laravel更新所选下拉列表的值？

1 个答案: