/// <summary> /// 检查文章信息是否存在 /// </summary> /// <param name="predicate">检查谓语表达式</param> /// <param name="id">更新的文章信息编号</param> /// <returns>文章信息是否存在</returns> public virtual Task <bool> CheckPostExists(Expression <Func <Post, bool> > predicate, int id = 0) { Check.NotNull(predicate, nameof(predicate)); return(PostRepository.CheckExistsAsync(predicate, id)); }