diff --git a/src/main/resources/mapper/ModelCaseMapper.xml b/src/main/resources/mapper/ModelCaseMapper.xml
index 86f4a37..85db81c 100644
--- a/src/main/resources/mapper/ModelCaseMapper.xml
+++ b/src/main/resources/mapper/ModelCaseMapper.xml
@@ -104,13 +104,13 @@
               and mi.name like concat('%', #{query.indexName}, '%')
           </if>
         <choose>
-            <when test="query.indexResult != null and query.indexResult == 0">
+            <when test="query.indexResult != '' and query.indexResult == 0">
                 and mir.index_result is null
             </when>
-            <when test="query.indexResult != null and query.indexResult == 1">
+            <when test="query.indexResult !='' and query.indexResult == 1">
                 and mir.index_result = 'true'
             </when>
-            <when test="query.indexResult != null and query.indexResult == 2">
+            <when test="query.indexResult !='' and query.indexResult == 2">
                 and mir.index_result = 'false'
             </when>
         </choose>