Undefined Offset: 1 laravel 6 - php

Question

i wanna update the data of categories on multilevel choose item, but i had a problem, i can edit the categories without choose a parent, but i can't edit the categories when i choose a parent. then its showing a error called undefined offset:1 and here the trace error
Illuminate\Foundation\Bootstrap\HandleExceptions::handleError
C:\laragon\www\oesingcoffee\vendor\laravel\framework\src\Illuminate\Validation\Concerns\ValidatesAttributes.php:874
this is validates attrib in laravel framework
protected function getExtraConditions(array $segments)
{
$extra = [];
$count = count($segments);
for ($i = 0; $i < $count; $i += 2) {
$extra[$segments[$i]] = $segments[$i + 1]; //this is the 874 line
}
return $extra;
}
this is the CategoryRequest class
class CategoryRequest extends FormRequest
{
public function authorize()
{
return true;
}
public function rules()
{
$parentId = (int) $this->get('parent_id');
$id = (int) $this->get('id');
if($this->method() == 'PUT'){
if($parentId > 0){
$name = 'required|unique:categories,name,'.$id.'id,parent_id,'.$parentId;
}else{
$name = 'required|unique:categories,name,'.$id;
}
$slug = 'unique:categories,slug,'.$id;
}else{
$name = 'required|unique:categories,name,NULL,id,parent_id,'.$parentId;
$slug = 'unique:categories,slug';
}
return [
'name' => $name,
'slug' => $slug,
];
}
}
this is my controller to update the data
public function update(CategoryRequest $request, $id)
{
$params = $request->except('_token');
$params['slug'] = Str::slug($params['name']);
$params['parent_id'] = (int)$params['parent_id'];
$category = Category::findOrFail($id);
if ($category->update($params)) {
Session::flash('success', 'Category has been updated.');
}
return redirect('admin/categories');
}
this the view form
#extends('admin.layout')
#section('content')
#php
$formTitle = !empty($category) ? 'Update' : 'New'
#endphp
<div class="content">
<div class="row">
<div class="col-lg-6">
<div class="card card-default">
<div class="card-header card-header-border-bottom">
<h2>{{ $formTitle }} Category</h2>
</div>
<div class="card-body">
#include('admin.partials.flash', ['$errors' => $errors])
#if (!empty($category))
{!! Form::model($category, ['url' => ['admin/categories', $category->id], 'method' => 'PUT']) !!}
{!! Form::hidden('id') !!}
#else
{!! Form::open(['url' => 'admin/categories']) !!}
#endif
<div class="form-group">
{!! Form::label('name', 'Name') !!}
{!! Form::text('name', null, ['class' => 'form-control', 'placeholder' => 'category name']) !!}
</div>
<div class="form-group">
{!! Form::label('parent_id', 'Parent') !!}
{!! General::selectMultiLevel('parent_id', $categories, ['class' => 'form-control', 'selected' => !empty(old('parent_id')) ? old('parent_id') : !empty($category['parent_id']) ? $category['parent_id'] : '', 'placeholder' => '-- Choose Category --']) !!}
</div>
<div class="form-footer pt-5 border-top">
<button type="submit" class="btn btn-primary btn-default">Save</button>
Back
</div>
{!! Form::close() !!}
</div>
</div>
</div>
</div>
#endSection
this is the migration
public function up()
{
Schema::create('categories', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('name');
$table->string('slug');
$table->bigInteger('parent_id');
$table->timestamps();
});
}
this is the edit method in controller
public function edit($id)
{
$category = Category::findOrFail($id);
$categories = Category::orderBy('name', 'asc')->get();
$this->data['categories'] = $categories->toArray();
$this->data['category'] = $category;
return view('admin.categories.form', $this->data);
}

Answer 1

you should try save() method.
public function update(CategoryRequest $request, $id)
{
$params = $request->except('_token');
$params['slug'] = Str::slug($params['name']);
$params['parent_id'] = (int)$params['parent_id'];
$category = Category::findOrFail($id);
if ($category->save()) {
Session::flash('success', 'Category has been updated.');
}
return redirect('admin/categories');
}
Replace with above one.

Answer 2

public function update(CategoryRequest $request, $id)
{
$params = $request->except('_token');
$category = Category::findOrFail($id);
$category->slug = Str::slug($params['name']);
$category->parent_id = (int)$params['parent_id'];
$category->save();
Session::flash('success', 'Category has been updated.');
return redirect('admin/categories');
}

Answer 3

I think your issue is inyour validation rule (specifically in your unique rule). May I suggest something else ?
I don't have the environment to test it right but now, so it may have some tweak to do.
use Illuminate\Validation\Rule;
...
public function rules()
{
$name = [
'required',
Rule::unique('categories')->where(function ($query) {
return $query->where('name', $this->name)
->where('parent_id', $this->parent_id);
})->ignore($this->id, 'id'),
];
$slug = [
Rule::unique('categories', 'slug')->ignore($this->id, 'id'),
];
return [
'name' => $name,
'slug' => $slug,
];
}