Daniil Sivak c93ec0a1f3 Fix: reject empty/space-only content in update_chunk API (#14082) ...

Closes #6541

### What problem does this PR solve?

Add content validation to `update_chunk` (SDK and non-SDK) to reject
empty or whitespace-only content before it reaches the embedding model.

**Before:** Calling `update_chunk` with space-only content (like `" "`,
`""`, `"\n"`) bypassed validation and was sent directly to the embedding
model, which returned an error. This was the same bug previously fixed
for `add_chunk` in #6390, but `update_chunk` was missed.

**After:** Empty/whitespace-only content is caught by validation and
returns an error: `` `content` is required ``

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

2026-04-15 18:43:53 +08:00

..

agents.py

Fix: inconsistent state handling for multi-user single-canvas access (#13267)

2026-02-28 15:09:21 +08:00

dify_retrieval.py

Call get_flatted_meta_by_kbs in dify retrieval (#13509)

2026-03-11 13:42:24 +08:00

doc.py

Fix: reject empty/space-only content in update_chunk API (#14082)

2026-04-15 18:43:53 +08:00

session.py

Refa: Chat conversations /convsersation API to RESTFul (#13893)

2026-04-02 20:49:23 +08:00