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

@@ -65,7 +65,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkDeptNameUnique" resultMap="SysDeptResult">
 	    <include refid="selectDeptVo"/>
-		where dept_name=#{deptName} and parent_id = #{parentId}
+		where dept_name=#{deptName} and parent_id = #{parentId} limit 1
 	</select>
 
 	<select id="selectDeptById" 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

@@ -123,7 +123,7 @@
 
 	<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

@@ -56,12 +56,12 @@ 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>
 	
  	<delete id="deletePostByIds" parameterType="Long">

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

@@ -70,12 +70,12 @@ 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>
 	
 	<delete id="deleteRoleById" parameterType="Long">

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

@@ -134,15 +134,15 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkLoginNameUnique" parameterType="String" resultType="int">
-		select count(1) from sys_user where login_name=#{loginName}
+		select count(1) from sys_user where login_name=#{loginName} 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>
 	
 	<select id="selectUserById" parameterType="Long" resultMap="SysUserResult">