Laravel框架实现model层的增删改查(CURD)操作示例

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 [];
    }
}