Springboot 整合mybatis可能出現的小問題之selectByPrimaryKey(id)查詢不出數據

實體類

@Data
public class AppGroupUser extends AppBaseEntity {
    private static final long serialVersionUID = 1L;

    /**
     * 羣組用戶關係ID
     */
    private String groupUserId;
    /**
     * 羣組ID
     */
    private String groupId;
    /**
     * 用戶ID
     */
    private String userId;
    /**
     * 羣暱稱
     */
    private String userNickName;
    /**
     * 用戶等級 0-普通用戶 1-管理員 2-羣主
     */
    private String userRank;
    /**
     * 邀請入羣用戶id
     */
    private String entryUserId;
    /**
     * 進羣方式
     */
    private String entryType;
    /**
     * 禁言 0-未禁言 1-已禁言
     */
    private String sayStatus;

}

Service方法

@Override
public AppGroupUser selectByPrimaryKey(String appGroupUserId) {
     return super.selectByPrimaryKey(appGroupUserId);
}

錯誤信息

16:50:05.487 [main] DEBUG c.r.s.m.A.selectByPrimaryKey - [debug,159] - ==>  Preparing: SELECT create_time,creator,update_time,updater,del_flag,group_user_id,group_id,user_id,user_nick_name,user_rank,entry_user_id,entry_type,say_status FROM app_group_user WHERE create_time = ? AND creator = ? AND update_time = ? AND updater = ? AND del_flag = ? AND group_user_id = ? AND group_id = ? AND user_id = ? AND user_nick_name = ? AND user_rank = ? AND entry_user_id = ? AND entry_type = ? AND say_status = ? 

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='createTime', mode=IN, javaType=class java.util.Date, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #1 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date

我明明是經過主鍵ID 去查詢sql的，爲啥是所有條件查詢？？？

說明mybatis並不知道按照id去查詢數據，而是按照全部條件去查詢，難怪查詢全部queryList()時能查到數據。因此咱們須要指定id爲主鍵才能夠。