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Posted to issues@hugegraph.apache.org by "llooFlashooll (via GitHub)" <gi...@apache.org> on 2023/03/16 15:46:24 UTC

[GitHub] [incubator-hugegraph] llooFlashooll opened a new issue, #2171: [Bug] Throw MissingMethodException for E() syntax

llooFlashooll opened a new issue, #2171:
URL: https://github.com/apache/incubator-hugegraph/issues/2171

   ### Bug Type (问题类型)
   
   other exception / error (其他异常报错)
   
   ### Before submit
   
   - [X] 我已经确认现有的 [Issues](https://github.com/apache/hugegraph/issues) 与 [FAQ](https://hugegraph.apache.org/docs/guides/faq/) 中没有相同 / 重复问题 (I have confirmed and searched that there are no similar problems in the historical issue and documents)
   
   ### Environment (环境信息)
   
   - HugeGraph Version: 0.12.0
   - Storage Backend: inmemory
   - Mixed Index Backend: none
   - Link to discussed bug: none
   - Operating system: macOS 13.2.1
   - API/Driver: Java
   
   ### Expected & Actual behavior (期望与实际表现)
   
   I first randomly create a graph. Then when I run the following query: `g.E().inV().bothE('el0').fold().as('x').E().where(__.count()).where(within('x'))` is thrown with an exception. I think this query is syntactically correct, but I keep triggering this kind of problem.
   
   **Expected behavior:**
   No exception should be expected to throw. Or futher messages or prompts should be thrown.
   
   **Actual behavior:**
   A `groovy.lang.MissingMethodException` is thrown. And I'm not really sure whether this problem should happen so I report this. I succeed this kind of collection transition when replacing `g.E()` with `g.V()`. So I guess there's some problems of `g.E()` syntax, and maybe it doesn't support midterm `E()` syntax.
   
   ```
   HugeGraph exception :
   groovy.lang.MissingMethodException: No signature of method: org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.DefaultGraphTraversal.E() is applicable for argument types: () values: []
   Possible solutions: by(groovy.lang.Closure), is(java.lang.Object), use([Ljava.lang.Object;), use(java.util.List, groovy.lang.Closure), use(java.lang.Class, groovy.lang.Closure), any()
   ```
   
   
   ### Vertex/Edge example (问题点 / 边数据举例)
   
   ```javascript
   Steps to reproduce:
   We create a graph with 10 nodes and 20 edges. We try to make it clear to reproduce the bugs, {}hope{} to not cause much inconvenience to your reviewing, but we believe the problem does exist.
   Following the following graph data generation query, we can reproduce the bugs:
   ```
   
   
   ### Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)
   
   _No response_


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[GitHub] [incubator-hugegraph] llooFlashooll commented on issue #2171: [Bug] Throw MissingMethodException for E() syntax

Posted by "llooFlashooll (via GitHub)" <gi...@apache.org>.
llooFlashooll commented on issue #2171:
URL: https://github.com/apache/incubator-hugegraph/issues/2171#issuecomment-1477817692

   I think is the middle `E()` here.
   ```
   g.E().inV().bothE('el0').fold().as('x').E().where(__.count()).where(within('x'))
                                           ^
   ```


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[GitHub] [incubator-hugegraph] javeme commented on issue #2171: [Bug] Throw MissingMethodException for E() syntax

Posted by "javeme (via GitHub)" <gi...@apache.org>.
javeme commented on issue #2171:
URL: https://github.com/apache/incubator-hugegraph/issues/2171#issuecomment-1477799532

   Sorry, not sure which is the key step in your reproduction process.


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