class OllamaEmbedding(BaseEmbedding):
"""Class for Ollama embeddings."""
base_url: str = Field(description="Base url the model is hosted by Ollama")
model_name: str = Field(description="The Ollama model to use.")
embed_batch_size: int = Field(
default=DEFAULT_EMBED_BATCH_SIZE,
description="The batch size for embedding calls.",
gt=0,
le=2048,
)
ollama_additional_kwargs: Dict[str, Any] = Field(
default_factory=dict, description="Additional kwargs for the Ollama API."
)
_client: Client = PrivateAttr()
_async_client: AsyncClient = PrivateAttr()
def __init__(
self,
model_name: str,
base_url: str = "http://localhost:11434",
embed_batch_size: int = DEFAULT_EMBED_BATCH_SIZE,
ollama_additional_kwargs: Optional[Dict[str, Any]] = None,
callback_manager: Optional[CallbackManager] = None,
**kwargs: Any,
) -> None:
super().__init__(
model_name=model_name,
base_url=base_url,
embed_batch_size=embed_batch_size,
ollama_additional_kwargs=ollama_additional_kwargs or {},
callback_manager=callback_manager,
**kwargs,
)
self._client = Client(host=self.base_url)
self._async_client = AsyncClient(host=self.base_url)
@classmethod
def class_name(cls) -> str:
return "OllamaEmbedding"
def _get_query_embedding(self, query: str) -> List[float]:
"""Get query embedding."""
return self.get_general_text_embedding(query)
async def _aget_query_embedding(self, query: str) -> List[float]:
"""The asynchronous version of _get_query_embedding."""
return await self.aget_general_text_embedding(query)
def _get_text_embedding(self, text: str) -> List[float]:
"""Get text embedding."""
return self.get_general_text_embedding(text)
async def _aget_text_embedding(self, text: str) -> List[float]:
"""Asynchronously get text embedding."""
return await self.aget_general_text_embedding(text)
def _get_text_embeddings(self, texts: List[str]) -> List[List[float]]:
"""Get text embeddings."""
embeddings_list: List[List[float]] = []
for text in texts:
embeddings = self.get_general_text_embedding(text)
embeddings_list.append(embeddings)
return embeddings_list
async def _aget_text_embeddings(self, texts: List[str]) -> List[List[float]]:
"""Asynchronously get text embeddings."""
return await asyncio.gather(
*[self.aget_general_text_embedding(text) for text in texts]
)
def get_general_text_embedding(self, texts: str) -> List[float]:
"""Get Ollama embedding."""
result = self._client.embeddings(
model=self.model_name, prompt=texts, options=self.ollama_additional_kwargs
)
return result["embedding"]
async def aget_general_text_embedding(self, prompt: str) -> List[float]:
"""Asynchronously get Ollama embedding."""
result = await self._async_client.embeddings(
model=self.model_name, prompt=prompt, options=self.ollama_additional_kwargs
)
return result["embedding"]
