'boolean','published_at'=>'datetime','expires_at'=>'datetime']; } public function author(): BelongsTo { return $this->belongsTo(Author::class); } public function category(): BelongsTo { return $this->belongsTo(Category::class); } public function tags(): BelongsToMany { return $this->belongsToMany(Tag::class, 'blog_post_tag'); } public function scopePublished(Builder $query): Builder { return $query->where('status','published')->where(fn(Builder $q)=>$q->whereNull('published_at')->orWhere('published_at','<=',now()))->where(fn(Builder $q)=>$q->whereNull('expires_at')->orWhere('expires_at','>',now())); } }