Re: [D] 关于电网拓扑数据导入 [incubator-hugegraph]

Tue, 09 Dec 2025 22:58:29 -0800 


GitHub user dosubot[bot] added a comment to the discussion: 关于电网拓扑数据导入

<!-- Answer -->
你的配置只差一个关键点就能导入成功：**struct.json 的 edges 里 field_mapping 必须写成**：

```json
"field_mapping": { "from": "from", "to": "to" }
```

不能写成 `{ "from": "id", "to": "id" }`，否则 loader 会把 CSV 的 id 列当作边属性导入，但 
schema.groovy 的 edgeLabel 没有声明 id 属性，导致 “Invalid property 'id' for edge label” 
或 “主键字段 [id] 为空” 的报错。

**详细原因和修正方法：**

- 你的顶点主键是 id（vertex_xxx.csv 里有 id 列，schema 里 primaryKeys("id")），loader 只会用 
from/to 字段的值直接作为顶点主键 id，不会再去查 vertex_xxx.csv 的其他字段。
- edge_connected_to.csv 的 id 列可以保留，但 loader 不会导入它为边属性，只要 field_mapping 不写 id 
就不会报错。
- edgeLabel 的 .properties() 只包含 "source_label", "target_label"，不要加 "id"。
- value_mapping 必须是平铺结构（你现在的写法没问题）。
- null_values 建议只保留 ["NULL", "null"]，不要加 ""，否则空字符串会被判定为 null。

**你只需要把 struct.json 里所有 edges 的 field_mapping 全部改成：**

```json
"field_mapping": { "from": "from", "to": "to" }
```

其他配置不用动。这样配置后，边就能正常导入且无报错，所有关系都能导入。[官方FAQ说明](https://github.com/apache/incubator-hugegraph-doc/blob/master/content/en/docs/guides/faq.md)

如果还有报错，请贴出 power_edges_to.csv 的 header 和前几行原始数据，以及 struct.json 某个 edges 
配置的完整内容，我可以帮你定位具体是哪一行或哪一列有问题。


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