!54 update ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml.

Merge pull request !54 from yongdaidai/N/A

@@ -78,6 +78,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	<select id="checkDeptNameUnique" resultMap="SysDeptResult">
 	    <include refid="selectDeptVo"/>
 		where dept_name=#{deptName} and parent_id = #{parentId}
+              limit 1
 	</select>
     
     <insert id="insertDept" parameterType="SysDept">