Laravel Nova：显示其他 table 列的分区

Question

我正在使用 Laravel Nova 分区来显示每个类别的项目数量。

public function calculate(Request $request) {
   return $this->count($request, Item::class, 'category_id');
}

这工作正常，但当然会在屏幕上显示 category_id。

我宁愿显示category_name。

模型构建如下：

class Item extends Model 
{
    public function category()
    {
        return $this->belongsTo('App\Category');
    }
 }

和

class Category extends Model
{
    public function item()
    {
        return $this->hasMany('App\Item');
    }   
}

此外，我在 Nova 类别资源中定义了以下内容：

public static $title = 'category_name';

如何显示类别名称而不是类别 ID？

Answer 1

来自documentation

Often, the column values that divide your partition metrics into groups will be simple keys, and not something that is "human friendly". Or, if you are displaying a partition metric grouped by a column that is a boolean, Nova will display your group labels as "0" and "1". For this reason, Nova allows you to provide a Closure that formats the label into something more readable:

/**
 * Calculate the value of the metric.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return mixed
 */
public function calculate(Request $request)
{
    return $this->count($request, User::class, 'stripe_plan')
            ->label(function ($value) {
                switch ($value) {
                    case null:
                        return 'None';
                    default:
                        return ucfirst($value);
                }
            });
}

所以，在你的情况下，它会是这样的：

/**
 * Calculate the value of the metric.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return mixed
 */
public function calculate(Request $request)
{
    return $this->count($request, Item::class, 'category_id');
        ->label(function ($value) {
            // Get your category name here
            // For example: return \App\Category::find($value)->name; 
        });
}

Laravel Nova：显示其他 table 列的分区

Laravel Nova: Partition to display other table's column

laravel

laravel-nova