bug fix

src/main/resources/mapper/TaShareActivityMapper.xml

     </update>
 
     <select id="calParticipateNum" resultType="java.lang.Integer">
-        select sum(t.join_people) as num from ta_share_record t where t.group_activity_id = #{groupActivityId} group by t.group_activity_id
+        select t.join_people as num from ta_share_record t where t.group_activity_id = #{groupActivityId} group by t.group_activity_id
     </select>
 
 </mapper>