chore: update test dependency and LazyImport block to make compatib…

…ility with `sentence-transformers>=3.0.0` explicit (#8295)

* sentence-transformers-3 update test dep and lazyimport block

* clearer release note

haystack/components/embedders/backends/sentence_transformers_backend.py

@@ -9,7 +9,7 @@
 from haystack.lazy_imports import LazyImport
 from haystack.utils.auth import Secret
 
-with LazyImport(message="Run 'pip install \"sentence-transformers>=2.3.0\"'") as sentence_transformers_import:
+with LazyImport(message="Run 'pip install \"sentence-transformers>=3.0.0\"'") as sentence_transformers_import:
     from sentence_transformers import SentenceTransformer
 
 

haystack/components/evaluators/sas_evaluator.py

@@ -11,7 +11,7 @@
 from haystack.utils import ComponentDevice, expit
 from haystack.utils.auth import Secret, deserialize_secrets_inplace
 
-with LazyImport(message="Run 'pip install \"sentence-transformers>=2.3.0\"'") as sas_import:
+with LazyImport(message="Run 'pip install \"sentence-transformers>=3.0.0\"'") as sas_import:
     from sentence_transformers import CrossEncoder, SentenceTransformer, util
     from transformers import AutoConfig
 

haystack/components/rankers/sentence_transformers_diversity.py

@@ -11,7 +11,7 @@
 logger = logging.getLogger(__name__)
 
 
-with LazyImport(message="Run 'pip install \"sentence-transformers>=2.3.0\"'") as torch_and_sentence_transformers_import:
+with LazyImport(message="Run 'pip install \"sentence-transformers>=3.0.0\"'") as torch_and_sentence_transformers_import:
     import torch
     from sentence_transformers import SentenceTransformer
 

pyproject.toml

@@ -82,7 +82,7 @@ format-check = "ruff format --check {args}"
 extra-dependencies = [
   "transformers[torch,sentencepiece]==4.41.2", # ExtractiveReader, TransformersSimilarityRanker, LocalWhisperTranscriber, HFGenerators...
   "huggingface_hub>=0.23.0",                   # Hugging Face API Generators and Embedders
-  "sentence-transformers>=2.3.0",              # SentenceTransformersTextEmbedder and SentenceTransformersDocumentEmbedder
+  "sentence-transformers>=3.0.0",              # SentenceTransformersTextEmbedder and SentenceTransformersDocumentEmbedder
   "langdetect",                                # TextLanguageRouter and DocumentLanguageClassifier
   "openai-whisper>=20231106",                  # LocalWhisperTranscriber
 

releasenotes/notes/update-sentence-transformers-3-3bca4e3f3ad3e7ba.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Starting from `haystack-ai==2.4.0`, Haystack is compatible with `sentence-transformers>=3.0.0`;
+    earlier versions of `sentence-transformers` are not supported.
+    We are updating the test dependency and the LazyImport messages to reflect that.