GitHub user dosubot[bot] added a comment to the discussion: 关于电网拓扑数据导入
<!-- Answer --> 你的理解**基本正确**，但有两个关键点需要注意，否则会导致关系不全： 1. **value_mapping 的作用** value_mapping 只是把 CSV 某一列的值（如 label/source_label/target_label）映射为你 schema.groovy 里定义的 edgeLabel 或属性值。它本身**不会过滤行**，只是把值替换后再尝试导入。如果 CSV 里没有 source_label/target_label 字段，或者内容不对，edgeLabel 还是会尝试导入所有行，但只有源/目标顶点 label 和 schema 里的 sourceLabel/targetLabel 完全匹配时才会真正导入成功，否则会被静默跳过（不会报错，但关系缺失）[参考](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/schema/builder/EdgeLabelBuilder.java)。 2. **CSV 必须有 source_label/target_label 字段且内容正确** 你写 `"source_label": { "LineSegment": "LineSegment" }, "target_label": { "LineSegment": "LineSegment" }`，前提是 edge_connected_to.csv 里有 source_label/target_label 两列，且 from/to 对应的顶点类型已经写进去了。例如： ``` id,from,to,label,source_label,target_label edge_1,XLD-3445,HWX-3087,CONNECTED_TO,LineSegment,StationHouse edge_2,HWX-3087,XLD-3258,CONNECTED_TO,StationHouse,LineSegment ... ``` 这样 struct.json 里每个 edgeLabel 的 value_mapping 才能精确筛选属于自己的那部分边，否则会被跳过。 3. **每种类型的边都要写一段 edgeLabel 配置** 比如 LineSegment2LineSegment、LineSegment2StationHouse、StationHouse2LineSegment、LineSegment2LineSwitch、LineSwitch2LineSegment、Substation2LineSegment、LineSegment2Substation 等，每种都要写一段，且 value_mapping 里的 label/source_label/target_label 都要和 schema.groovy 里的 edgeLabel、sourceLabel、targetLabel 完全一致。 **典型配置示例：** ```json { "label": "LineSegment2StationHouse", "source": ["from"], "target": ["to"], "input": { "type": "file", "path": "/loader/power_data/edge_connected_to.csv", "format": "CSV", "header": ["id", "from", "to", "label", "source_label", "target_label"] }, "field_mapping": { "from": "id", "to": "id" }, "value_mapping": { "label": { "CONNECTED_TO": "LineSegment2StationHouse" }, "source_label": { "LineSegment": "LineSegment" }, "target_label": { "StationHouse": "StationHouse" } } } ``` 每种类型的边都要写一段，path 可以都指向同一个 CSV 文件。 **建议：** - 检查 edge_connected_to.csv 是否有 source_label/target_label 字段，且内容和顶点 label 一致。 - 检查 struct.json 里每个 edgeLabel 的 value_mapping 是否和 schema.groovy 完全一致。 - 导入后用 REST API 查询各类边的数量和类型，验证关系是否齐全。 如还有问题，可以贴出一小段 edge_connected_to.csv 和 struct.json 的完整 edge 配置，我可以帮你逐条检查。 详细机制见[源码说明](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/schema/builder/EdgeLabelBuilder.java)。 <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](https://go.dosu.dev/dosubot).* --- <sup>How did I do? 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