60 lines
1.4 KiB
PHP
60 lines
1.4 KiB
PHP
<?php
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namespace App\Models;
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class Topic extends Model
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{
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protected $fillable = ['title', 'category_id', 'body', 'excerpt', 'slug'];
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public function link($params)
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{
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return route('topics.show', array_merge([$this->id, $this->slug], $params));
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}
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public function scopeWithOrder($query, $order)
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{
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// 不同的排序，使用不同的数据读取逻辑
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switch ($order) {
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case 'recent':
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$query = $this->recent();
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break;
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default:
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$query = $this->recentReplied();
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break;
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}
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// 预加载防止 N+1 问题
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return $query->with('user', 'category');
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}
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public function scopeRecentReplied($query)
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{
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// 当话题有新回复时，我们将编写逻辑来更新话题模型的 reply_count 属性，
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// 此时会自动触发框架对数据模型 updated_at 时间戳的更新
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return $query->orderBy('updated_at', 'desc');
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}
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public function scopeRecent($query)
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{
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// 按照创建时间排序
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return $query->orderBy('created_at', 'desc');
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}
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public function replies()
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{
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return $this->hasMany(Reply::class);
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}
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public function user()
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{
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return $this->belongsTo(User::class);
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}
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public function category()
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{
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return $this->belongsTo(Category::class);
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}
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}
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