增加接口

coolstore-partner-dao/src/main/java/com/cool/store/dao/HomeTemplateUserMappingDAO.java

@@ -3,6 +3,7 @@ package com.cool.store.dao;
 
 import com.cool.store.entity.HomeTemplateUserMappingDO;
 import com.cool.store.mapper.HomeTemplateUserMappingMapper;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Repository;
 import tk.mybatis.mapper.entity.Example;
 
@@ -24,6 +25,9 @@ public class HomeTemplateUserMappingDAO {
         return homeTemplateUserMappingMapper.insertSelective(homeTemplateRoleMappingDO);
     }
     public HomeTemplateUserMappingDO getHomeTemplateRoleMappingByUserId(String userId) {
+        if (StringUtils.isBlank(userId)){
+            return null;
+        }
         Example example = new Example(HomeTemplateUserMappingDO.class);
         example.createCriteria().andEqualTo("userId", userId);
         return homeTemplateUserMappingMapper.selectOneByExample(example);