How to show default value in select option (parent_id)? - laravel

Question

I tried to save a parent_id of Category in Laravel 5.8 successfully, but I want to edit category now.
CategoryController.php
public function edit(Category $category)
{
return view('Admin.categories.edit', compact('category'));
}
public function update(CategoryRequest $request, Category $category)
{
$category->update($request->all());
return redirect(route('categories.index'));
}
edit.blade.php
<form action="{{ route('categories.update', $category->id) }}" method="post">
{{ method_field('PATCH') }}
{{ csrf_field() }}
#include('Admin.layouts.errors')
<div class="form-group">
<label for="name">Name</label>
<input type="text" class="form-control" value="{{ old('name') ? : $category->name }}" id="name" name="name">
</div>
<div class="form-group">
<label for="parent_id">Sub Category</label>
<select class="form-control" id="parent_id" name="parent_id" data-live-search="true">
#foreach(\App\Category::all() as $category)
<option value="{{ $category->id }}" {{ trim($category->id) , $category->pluck('id')->toArray() ? 'selected' : '' }}>{{ $category->name }}</option>
#endforeach
</select>
</div>
<button type="submit" class="btn btn-primary">Save</button>
</form>
For example, I have the following categories in the database.
id name parent_id
1 Software 0
2 Hardware 0
3 Photoshop 1
4 CoredDraw 1
If a user, for example, selects CorelDraw for edit, open edit for it. Select the name input tag, write CorelDraw. Select the parent_id option tag select Software. Because this is parent_id is = 0.

Answer 1

You need to do some basic improvement in your code, Make a practice of fire query in the model or in the controller
Blade file is not for load the data from the database
Controller
public function edit(Category $category)
{
$allCategory = \App\Category::all();
return view('Admin.categories.edit', compact('category','allCategory'));
}
Blade
<select class="form-control" id="parent_id" name="parent_id" data-live-search="true">
<option value="">Select Parent</option>
#foreach($allCategory as $cate)
<option value="{{ $cate->id }}" {{ $category->id == $cate->id ? 'selected' : '' }}>{{ $cate->name }}</option>
#endforeach
</select>
Once the user starts typing different category name you need to reset the select box using any client side script