Problem with Knowledge Base Queries after Updating to Dify 1.2.0

[MitraSafarinejad]

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Dify version

1.2.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

After updating Dify to version 1.2, I'm encountering the following error when querying my existing knowledge bases:

Error during query: [{'locations': [{'column': 6, 'line': 1}], 'message': 'Cannot query field "Vector_index_b1df11d8_9f64_4c01_be16_60bc3b8d7d1f_Node" on type "GetObjectsObj".', 'path': None}];
I discovered that this issue can be resolved by changing the Embedding Model. However, I have a large number of documents already uploaded, and manually updating the embedding model for each document or knowledge base is not feasible.

✔️ Expected Behavior

Queries to existing knowledge bases should continue working normally after updating to version 1.2 without needing to manually change embedding models or reprocess documents.

❌ Actual Behavior

Queries to existing knowledge bases fail with the following error:

Error during query: [{'locations': [{'column': 6, 'line': 1}], 'message': 'Cannot query field "Vector_index_b1dfd8_9f64_4c01_be16_60bc8d7d1f_Node" on type "GetObjectsObj".', 'path': None}]; Error during query: [{'locations': [{'column': 6, 'line': 1}], 'message': 'Cannot query field "Vector_index_b1dfd8_9f64_4c01_be16_60bc8d7d1f_Node" on type "GetObjectsObj".', 'path': None}]

[dosubot]

I found two similar closed issues related to your problem:

1. Dify1.2 knowledge base cannot be retrieved - No solution found in the comments ^[1].
2. Embedding模型不生效 - No solution found in the comments ^[2].

Regarding your issue, the error "Cannot query field 'Vector_index_b1df11d8_9f64_4c01_be16_60bc3b8d7d1f_Node' on type 'GetObjectsObj'" can be resolved by waiting for the background re-indexing process to complete. Unfortunately, there is no visible indicator of progress, so patience is required. If the error persists, you may need to delete the dataset and upload it again, as the vector index needs to be rebuilt when switching between different embedding models ^[3].

To continue talking to Dosu, mention @dosu.

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[crazywoola]

@JohnJyong Can you take a look at this?