Sentinel errors01
Weave defines sentinel errors in the root package. Use errors.Is to check for them:
import (
"errors"
"github.com/xraph/weave"
)
doc, err := engine.Ingest(ctx, col.ID, input)
if errors.Is(err, weave.ErrCollectionNotFound) {
// collection does not exist for this tenant
}| Error | Description |
weave.ErrCollectionNotFound | No collection with the given ID exists for the current tenant |
weave.ErrDocumentNotFound | No document with the given ID exists |
weave.ErrChunkNotFound | No chunk with the given ID exists |
weave.ErrEmptyContent | Ingest was called with empty content |
weave.ErrInvalidInput | Required field is missing or malformed |
weave.ErrEmbedderRequired | No embedder was configured on the engine |
weave.ErrStoreRequired | No metadata store was configured on the engine |
weave.ErrVectorStoreRequired | No vector store was configured on the engine |
Document state errors02
When doc.State == "failed", the ingestion error is persisted in doc.Error:
doc, _ := engine.GetDocument(ctx, docID)
if doc.State == "failed" {
fmt.Println("ingestion failed:", doc.Error)
}This allows you to inspect failure reasons without polling or relying on in-process error propagation, which is useful when ingestion runs asynchronously.
Store errors03
Metadata and vector store implementations may return their own errors (e.g. database connection errors). These are propagated directly from engine.Ingest or engine.Retrieve without wrapping, so you can inspect them with the driver-specific error types if needed.
Extension hook errors04
Extension hooks that return errors do not abort the ingestion pipeline — errors from OnIngestCompleted and similar hooks are logged but not surfaced to the caller. The OnIngestFailed hook receives ingestion errors for observability.