唯一限制条件只返回单条数据

ruoyi-system/src/main/resources/mapper/system/SysConfigMapper.xml

@@ -61,7 +61,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     
     <select id="checkConfigKeyUnique" parameterType="String" resultMap="SysConfigResult">
         <include refid="selectConfigVo"/>
-        where config_key = #{configKey}
+        where config_key = #{configKey} limit 1
     </select>
     
     <insert id="insertConfig" parameterType="SysConfig">

ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml

@@ -64,7 +64,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="hasChildByDeptId" parameterType="Long" resultType="int">
 		select count(1) from sys_dept
-		where del_flag = '0' and parent_id = #{deptId}
+		where del_flag = '0' and parent_id = #{deptId} limit 1
 	</select>
 	
 	<select id="selectChildrenDeptById" parameterType="Long" resultMap="SysDeptResult">

ruoyi-system/src/main/resources/mapper/system/SysDictTypeMapper.xml

@@ -57,7 +57,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkDictTypeUnique" parameterType="String" resultMap="SysDictTypeResult">
 		<include refid="selectDictTypeVo"/>
-		where dict_type = #{dictType}
+		where dict_type = #{dictType} limit 1
 	</select>
 	
 	<delete id="deleteDictTypeById" parameterType="Long">

ruoyi-system/src/main/resources/mapper/system/SysMenuMapper.xml

@@ -118,7 +118,7 @@
 	
 	<select id="checkMenuNameUnique" parameterType="SysMenu" resultMap="SysMenuResult">
 		<include refid="selectMenuVo"/>
-		where menu_name=#{menuName} and parent_id = #{parentId}
+		where menu_name=#{menuName} and parent_id = #{parentId} limit 1
 	</select>
 	
 	<update id="updateMenu" parameterType="SysMenu">

ruoyi-system/src/main/resources/mapper/system/SysPostMapper.xml

@@ -64,12 +64,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkPostNameUnique" parameterType="String" resultMap="SysPostResult">
 		<include refid="selectPostVo"/>
-		 where post_name=#{postName}
+		 where post_name=#{postName} limit 1
 	</select>
 	
 	<select id="checkPostCodeUnique" parameterType="String" resultMap="SysPostResult">
 		<include refid="selectPostVo"/>
-		 where post_code=#{postCode}
+		 where post_code=#{postCode} limit 1
 	</select>
 	
 	<update id="updatePost" parameterType="SysPost">

ruoyi-system/src/main/resources/mapper/system/SysRoleMapper.xml

@@ -80,12 +80,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkRoleNameUnique" parameterType="String" resultMap="SysRoleResult">
 		<include refid="selectRoleVo"/>
-		 where r.role_name=#{roleName}
+		 where r.role_name=#{roleName} limit 1
 	</select>
 	
 	<select id="checkRoleKeyUnique" parameterType="String" resultMap="SysRoleResult">
 		<include refid="selectRoleVo"/>
-		 where r.role_key=#{roleKey}
+		 where r.role_key=#{roleKey} limit 1
 	</select>
 	
  	<insert id="insertRole" parameterType="SysRole" useGeneratedKeys="true" keyProperty="roleId">

ruoyi-system/src/main/resources/mapper/system/SysUserMapper.xml

@@ -92,15 +92,15 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkUserNameUnique" parameterType="String" resultType="int">
-		select count(1) from sys_user where user_name = #{userName}
+		select count(1) from sys_user where user_name = #{userName} limit 1
 	</select>
 	
 	<select id="checkPhoneUnique" parameterType="String" resultMap="SysUserResult">
-		select user_id, phonenumber from sys_user where phonenumber = #{phonenumber}
+		select user_id, phonenumber from sys_user where phonenumber = #{phonenumber} limit 1
 	</select>
 	
 	<select id="checkEmailUnique" parameterType="String" resultMap="SysUserResult">
-		select user_id, email from sys_user where email = #{email}
+		select user_id, email from sys_user where email = #{email} limit 1
 	</select>
 	
 	<insert id="insertUser" parameterType="SysUser" useGeneratedKeys="true" keyProperty="userId">