使用 Laravel 过滤表下拉 livewire

Question

我有这个 livewire 组件，它根据两个下拉按钮过滤表格。一个称为实例，另一个称为作业。我想找到一种过滤两个按钮的方法。

以这种方式或我将其传递给渲染 updatejob 或 updateinstance。所以只有两个按钮中的一个起作用。有什么方法可以让它们都工作吗？

从某种意义上说，如果我使用一个公共变量，通过这两种方法将查询结果传递给它，它不允许我进行分页，因为我将操作它的公共变量，它允许集合

namespace App\Http\Livewire;
    use Livewire\WithPagination;
    
    use App\Models\Task;
    use Livewire\Component;
    
    class TableTodo extends Component
    {
        use WithPagination;
    
        public $instance;
        public $job;
        public $jobs;
        // public $tasks;
        public $instances;
    
        public function updatinginstance()
        {
            $this->resetPage();
        }
    
        public function mount()
        {
            $this->instance='';
            $this->job='';
            // $this->tasks=[];
            $this->instances=[];
            $this->jobs=[];
        }
    
        public function updatedinstance()
        {
            $in = Task::find($this->instance);
    
            if(!empty($in))
            {
                $tasks= Task::whereIn('process_status', ['new','processing'])
                ->where('instance','like', $in->instance)
                ->orderByRaw('FIELD(process_status, "new", "processing")asc')
                ->orderBy('created_at', 'asc')
                ->paginate(50)
                ;
            }
            else
            {
                $tasks= Task::whereIn('process_status', ['new','processing'])
                ->orderByRaw('FIELD(process_status, "new", "processing")asc')
                ->orderBy('created_at', 'asc')
                ->paginate(50)
                ;
            }
    
            return $tasks;
    
        }
    
        public function updatedjob()
        {
    
            $in_job = Task::find($this->job);
    
            if(!empty($in_job))
            {
                $tasks = Task::whereIn('process_status', ['new','processing'])
                ->where('job', 'like', $in_job->job)
                ->orderByRaw('FIELD(process_status, "new", "processing")asc')
                ->orderBy('created_at', 'asc')
                ->paginate(50);
            }
            else
            {
                $tasks = Task::whereIn('process_status', ['new','processing'])
                ->orderByRaw('FIELD(process_status, "new", "processing")asc')
                ->orderBy('created_at', 'asc')
                ->paginate(50);
            }
    
            return $tasks;
        }
    
    
        public function render()
        {
            $this->instances = Task::whereIn('process_status', ['new','processing'])->orderBy('created_at', 'asc')->get();
    
            $this->jobs = Task::whereIn('process_status', ['new','processing'])->orderBy('created_at', 'asc')->get();
            $tasks = $this->updatedjob();
            $tasks = $this->updatedinstance();
    
            return view('livewire.table-todo',['tasks' => $tasks]);
        }
    }

Answer 1

您可以使用when() 有条件地应用两个 where 子句。这里的第一个参数暴露在闭包中，这对于传递模型的这种特殊情况很有用。如果when() 的第一个参数为真，则执行闭包。否则，它什么也不做。

您还可以通过重复使用相同的方法来大量清理代码，而不必重复自己。

<?php 

namespace App\Http\Livewire;

use Livewire\WithPagination;

use App\Models\Task;
use Livewire\Component;

class TableTodo extends Component
{
    use WithPagination;

    public $instance = '';
    public $job = '';
    public $jobs = [];
    public $instances = [];

    private $tasks = [];

    public function updatinginstance()
    {
        $this->resetPage();
    }

    public function mount()
    {
        $this->instances = Task::whereIn('process_status', ['new', 'processing'])
                               ->orderBy('created_at', 'ASC')
                               ->get();
        $this->jobs = Task::whereIn('process_status', ['new', 'processing'])
                          ->orderBy('created_at', 'ASC')
                          ->get();
        $this->filterTask();
    }

    public function updatedInstance()
    {
        $this->filterTask();
    }

    public function updatedJob()
    {
        $this->filterTask();
    }

    public function filterTask() 
    {
        $job = Task::find($this->job);
        $instance = Task::find($this->instance);

        $tasks = Task::when($job, function($query, $job) {
                    return $query->where('job', 'LIKE', $job->job);
                })
                ->when($instance, function($query, $instance) {
                    return $query->where('instance','like', $instance->instance);
                })
                ->orderByRaw("FIELD(process_status, 'new', 'processing') ASC")
                ->orderBy('created_at', 'asc')
                ->paginate(50);

        $this->tasks = $tasks;
    }

    public function render()
    {
        return view('livewire.table-todo', ['tasks' => $this->tasks]);
    }
}