44 lines
813 B
PHP
44 lines
813 B
PHP
<?php
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namespace App\Models\System;
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use App\Traits\ModelTrait;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Database\Eloquent\Relations\HasMany;
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class City extends Model
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{
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use ModelTrait;
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protected $table = 'system_city';
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protected $fillable = [
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'title',
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'code',
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'parent_code',
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];
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/**
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* 子级城市
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*/
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public function children(): HasMany
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{
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return $this->hasMany(City::class, 'parent_code', 'code');
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}
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/**
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* 父级城市
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*/
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public function parent()
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{
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return $this->belongsTo(City::class, 'parent_code', 'code');
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}
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/**
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* 判断是否是顶级城市（省/直辖市/自治区）
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*/
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public function isTopLevel(): bool
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{
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return empty($this->parent_code);
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}
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}
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