我如何在Laravel中更新类别下拉菜单 [英] How can i update category dropdown menu in laravel

问题描述

这是我的类别下拉列表代码，

<div class="control-group">
    <label class="control-label">Under Category </label>
    <div class="controls">
        <select name="category_id" id="category_id" style="width:220px;">
            <option value='' selected disabled>Select</option>
            @foreach(App\Category::all() as $cat)
                <option value="{{$cat->id}}">
                    @if {{ $cat->parent ? '--' . $cat->name : $cat->name }}
                    selected @endif>{{ $cat->parent ? '--' . $cat->name : $cat->name }}
                </option>
            @endforeach
        </select>

    </div>
</div>

对于更新类别，我只使用

for update category i just use

 @if {{ $cat->parent ? '--' . $cat->name : $cat->name }}
   selected @endif>{{ $cat->parent ? '--' . $cat->name : $cat->name }}

但是给出了这样的错误:-

but gives an error like that :-

ErrorException(E_ERROR)语法错误，意外的':'，期望'('(看法:F:\ laragon \ www \ flipcart \ resources \ views \ admin \ products \ editproduct.blade.php)

ErrorException (E_ERROR) syntax error, unexpected ':', expecting '(' (View: F:\laragon\www\flipcart\resources\views\admin\products\editproduct.blade.php)

推荐答案

首先，从最好的角度出发，不要从视图与数据层进行通信.使用控制器将数据传递到视图.

First of all from a best practive standpoint, dont communicate with the data layer from a view. Pass the data to a view using the controller.

对于您的问题:修复if语句，您正在尝试回显条件.

For you problem: Fix the if statement, you're trying to echo the condition.

 <select class="form-control form-control-alternative" name="category">
  <option selected value="{{$category->id}}">{{$category->name}}</option>
  @foreach($$categories as $cat)
      @if($cat->id !== $category->id)
          <option value="{{$cat->id}}">{{$cat->name}}</option>
      @endif
  @endforeach
</select>

调用控制器的功能

public function __invoke(Category $category)
{
    $categories = Category::all();
    return view('machine.edit', compact('category', 'categories'));
}

这篇关于我如何在Laravel中更新类别下拉菜单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！