iao_team/app/Http/Livewire/City.php

<?php

namespace App\Http\Livewire;

use Livewire\Component;

use Livewire\WithPagination;

class City extends Component
{

    use WithPagination;

    protected $paginationTheme = 'bootstrap';

    public $sortField ='cities.name';
    public $sortAsc = true;
    public function sortBy($field)
    {
        if($this->sortField === $field)
        {
            $this->sortAsc = ! $this->sortAsc;
        } else {
            $this->sortAsc = true;
        }

        $this->sortField = $field;
    }

    public $name, $enabled, $dataId, $province_id, $update = false, $add = false;

    public $provinces = array();

    protected $rules = [
        'name' => 'required',
        'province_id' => 'required'
    ];

    protected $messages = [
        'name.required' => 'Il nome è obbligatorio'
    ];

    public function resetFields(){
        $this->name = '';
        $this->enabled = true;
        $this->province_id = null;
    }

    public function mount()
    {
        $this->provinces = \App\Models\Province::select('id', 'name')->get();
    }

    public function render()
    {
        $rows = \App\Models\City::select('cities.name', 'cities.id', 'cities.enabled', 'provinces.name as province_name')->join('provinces', 'cities.province_id', '=', 'provinces.id')->get();
            //->orderBy($this->sortField, $this->sortAsc ? 'asc' : 'desc')
            //->paginate(10);

        //$rows = \App\Models\City::with('province')->orderBy($this->sortField, $this->sortAsc ? 'asc' : 'desc')->paginate(10);
        return view('livewire.city', ['records' => $rows]);
    }

    public function add()
    {
        $this->resetFields();
        $this->add = true;
        $this->update = false;
    }

    public function store()
    {
        $this->validate();
        try {
            \App\Models\City::create([
                'name' => $this->name,
                'province_id' => $this->province_id,
                'enabled' => $this->enabled
            ]);
            session()->flash('success','Città creata');
            $this->resetFields();
            $this->add = false;
        } catch (\Exception $ex) {
            session()->flash('error','Errore (' . $ex->getMessage() . ')');
        }
    }

    public function edit($id){
        try {
            $city = \App\Models\City::findOrFail($id);
            if( !$city) {
                session()->flash('error','Città non trovata');
            } else {
                $this->name = $city->name;
                $this->enabled = $city->enabled;
                $this->province_id = $city->province_id;
                $this->dataId = $city->id;
                $this->update = true;
                $this->add = false;
            }
        } catch (\Exception $ex) {
            session()->flash('error','Errore (' . $ex->getMessage() . ')');
        }
    }

    public function update()
    {
        $this->validate();
        try {
            \App\Models\City::whereId($this->dataId)->update([
                'name' => $this->name,
                'province_id' => $this->province_id,
                'enabled' => $this->enabled
            ]);
            session()->flash('success','Città aggiornata');
            $this->resetFields();
            $this->update = false;
        } catch (\Exception $ex) {
            session()->flash('error','Errore (' . $ex->getMessage() . ')');
        }
    }

    public function cancel()
    {
        $this->add = false;
        $this->update = false;
        $this->resetFields();
    }

    public function delete($id)
    {
        try{
            \App\Models\City::find($id)->delete();
            session()->flash('success',"Città eliminata");
        }catch(\Exception $e){
            session()->flash('error','Errore (' . $ex->getMessage() . ')');
        }
    }
}