laravel 框架在model层的增删改查

    protected $table = 'user_city';
    public $timestamps = false;


    //添加 返回id
    public function cityadd($data)
    {
        return $this->insertGetId($data);
    }

//单条查找

 public function getfind($id)
    {
        if($this->where('id',$id)->first()){
            return $this->where('id',$id)->first()->toArray();
        }else{
            return [];
        }

    }

//查询用户有几个uid,返回数量
    public function countCity($uid){
		if($this->where('uid',$uid)->first()){
			return $this->where('uid',$uid)->count();
		}else{
			return [];
		}
        

	}      



//查询全部数据

 public function getAll()
    {
		return $this->get()->toArray();

    }     

	  /**
     * 修改管理员信息
     * @param $id
     * @param $data
     * @return bool
     */
    public function upAdmin($id,$data)
    {
        if($this->find($id)){
            return $this->where('id',$id)->update($data);
        }else{
            return false;
        }

    }

//加条件，时间

//查询用户的认购的城数
    public function buy_num($uid){
		$startDate = date('Y-m-01', strtotime(date("Y-m-d")));
        $endDate = date('Y-m-d', strtotime("$startDate +1 month -1 day"));
        // 将日期转换为Unix时间戳
        $endDate=$endDate." 22:59:59";
        $startDateStr = strtotime($startDate);
        $endtDateStr = strtotime($endDate);
 return $this->where('uid',$uid)->where('buy_type',1)->whereBetween('create_time', array($startDateStr,$endtDateStr))->sum('buy_num');
    }

 /**
     * 根据id查找城池信息 只返回某个字段的值
     * @param $id
     * @return array
     */
    public function getCityName($id)
    {
        if($this->where('city_id',$id)->first()){
            return $this->where('city_id',$id)->lists('city_name')[0];
        }else{
            return [];
        }
    }