refactor(model): default measure agg to none.

- 添加对 dataTypeMap 的 containsKey 检查避免空指针异常
- 修复维度数据类型映射逻辑中的潜在运行时错误
- 确保在模型ID不存在时跳过数据类型映射操作

headless/chat/src/main/java/com/tencent/supersonic/headless/chat/mapper/HanlpDictMatchStrategy.java

@@ -9,6 +9,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
@@ -50,8 +51,12 @@ public class HanlpDictMatchStrategy extends SingleMatchStrategy<HanlpMapResult>
             return new ArrayList<>();
         }
         // step3. merge pre/suffix result
+        // sort by similarity (desc) first, then name length (desc), so that
+        // higher-similarity records are inserted first and survive LinkedHashSet dedup
         hanlpMapResults = hanlpMapResults.stream()
-                .sorted((a, b) -> -(b.getName().length() - a.getName().length()))
+                .sorted(Comparator.comparingDouble(HanlpMapResult::getSimilarity).reversed()
+                        .thenComparing((a, b) -> Integer.compare(b.getName().length(),
+                                a.getName().length())))
                 .collect(Collectors.toCollection(LinkedHashSet::new));
 
         // step4. filter by similarity

headless/chat/src/main/java/com/tencent/supersonic/headless/chat/mapper/MapFilter.java

@@ -123,15 +123,9 @@ public class MapFilter {
                     .filter(SchemaElementMatch::isFullMatched).collect(Collectors.toList());
 
             if (!fullMatches.isEmpty()) {
-                // If there are objects with similarity=1.0, choose the one with the longest
-                // detectWord and smallest offset
-                SchemaElementMatch bestMatch = fullMatches.stream()
-                        .max(Comparator.comparing(
-                                (SchemaElementMatch match) -> match.getDetectWord().length()))
-                        .orElse(null);
-                if (bestMatch != null) {
-                    result.add(bestMatch);
-                }
+                // Keep all records with similarity=1.0, as they may correspond to different
+                // elementIds with the same detectWord
+                result.addAll(fullMatches);
             } else {
                 // If there are no objects with similarity=1.0, keep all objects with similarity<1.0
                 result.addAll(group);

headless/server/src/main/java/com/tencent/supersonic/headless/server/utils/DataSetSchemaBuilder.java

@@ -123,8 +123,10 @@ public class DataSetSchemaBuilder {
                 dimToAdd.getExtInfo().put(DimensionConstants.DIMENSION_DATA_TYPE,
                         dim.getDataType());
             } else {
-                dimToAdd.getExtInfo().put(DimensionConstants.DIMENSION_DATA_TYPE,
-                        dataTypeMap.get(dim.getModelId()).get(dim.getBizName()));
+                if (dataTypeMap.containsKey(dim.getModelId())) {
+                    dimToAdd.getExtInfo().put(DimensionConstants.DIMENSION_DATA_TYPE,
+                            dataTypeMap.get(dim.getModelId()).get(dim.getBizName()));
+                }
             }
             if (dim.isTimeDimension()) {
                 String timeFormat =

webapp/packages/supersonic-fe/src/pages/SemanticModel/Datasource/components/ModelFieldForm.tsx

@@ -105,7 +105,7 @@ const ModelFieldForm: React.FC<Props> = ({
                 let defaultParams:any = {};
                 if (value === EnumDataSourceType.MEASURES) {
                   defaultParams = {
-                    agg: AGG_OPTIONS[0].value,
+                    agg: AGG_OPTIONS[AGG_OPTIONS.length - 1].value,
                     classType: EnumDataSourceType.MEASURES,
                     type: EnumDataSourceType.MEASURES,
                   };
@@ -217,7 +217,7 @@ const ModelFieldForm: React.FC<Props> = ({
                 handleFieldChange(record, 'agg', value);
               }}
               allowClear
-              defaultValue={AGG_OPTIONS[0].value}
+              defaultValue={AGG_OPTIONS[AGG_OPTIONS.length - 1].value}
               style={{ width: '100%' }}
             >
               {AGG_OPTIONS.map((item) => (