src/main/java/com/example/g8backend/mapper/UserSigninMapper.java

package com.example.g8backend.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.g8backend.entity.UserSignin;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface UserSigninMapper extends BaseMapper<UserSignin> {

    @Select("SELECT COUNT(*) FROM user_signin WHERE user_id = #{userId} AND signin_date = #{date}")
    boolean existsByUserIdAndDate(@Param("userId") Long userId, @Param("date") String date);
}