fix: Disallowing 0-dimensional embeddings

Refs: chroma-core#1698

chromadb/api/types.py

@@ -476,7 +476,11 @@ def validate_embeddings(embeddings: Embeddings) -> Embeddings:
         raise ValueError(
             f"Expected each embedding in the embeddings to be a list, got {embeddings}"
         )
-    for embedding in embeddings:
+    for i,embedding in enumerate(embeddings):
+        if len(embedding) == 0:
+            raise ValueError(
+                f"Expected each embedding in the embeddings to be a non-empty list, got empty embedding at pos {i}"
+            )
         if not all(
             [
                 isinstance(value, (int, float)) and not isinstance(value, bool)

chromadb/test/property/test_embeddings.py

@@ -455,3 +455,10 @@ def test_autocasting_validate_embeddings_incompatible_types(
         validate_embeddings(Collection._normalize_embeddings(embds))
 
     assert "Expected each value in the embedding to be a int or float" in str(e)
+
+
+def test_0dim_embedding_validation() -> None:
+    embds = [[]]
+    with pytest.raises(ValueError) as e:
+        validate_embeddings(embds)
+    assert "Expected each embedding in the embeddings to be a non-empty list" in str(e)