52 lines
1.5 KiB
PHP
52 lines
1.5 KiB
PHP
<?php
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namespace App\Models;
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use Illuminate\Database\Eloquent\Factories\HasFactory;
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use Illuminate\Database\Eloquent\Model;
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use EloquentFilter\Filterable;
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class Keyword extends Model
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{
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use HasFactory;
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use Filterable;
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protected $fillable = ['name', 'key', 'value', 'parent_id', 'parent_key', 'path', 'sort', 'lv'];
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protected function serializeDate(\DateTimeInterface $date)
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{
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return $date->format('Y-m-d H:i:s');
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}
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protected static function boot()
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{
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parent::boot();
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// 监听 Keyword 的创建事件，用于初始化 path 和 lv 字段值
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static::creating(function ($keyword) {
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// 如果创建的是一个根类目
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if (! $keyword->parent_id) {
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// 将层级设为 1
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$keyword->lv = 1;
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// 将 path 设为 -
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$keyword->path = '-';
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} else {
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// 将层级设为父类目的层级 + 1
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$keyword->lv = $keyword->parent->lv ++;
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$keyword->parent_key = $keyword->parent->key;
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// 将 path 值设为父类目的 path 追加父类目 ID 以及最后跟上一个 - 分隔符
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$keyword->path = $keyword->parent->path.$keyword->parent_id.'-';
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}
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});
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}
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public function parent()
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{
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return $this->belongsTo(static::class, 'parent_id');
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}
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public function children()
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{
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return $this->hasMany(static::class, 'parent_id');
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}
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}
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