feat: add xinference embedding model support (#930)

api/core/model_providers/models/embedding/xinference_embedding.py

+from langchain.embeddings import XinferenceEmbeddings
+from replicate.exceptions import ModelError, ReplicateError
+
+from core.model_providers.error import LLMBadRequestError
+from core.model_providers.providers.base import BaseModelProvider
+from core.model_providers.models.embedding.base import BaseEmbedding
+
+
+class XinferenceEmbedding(BaseEmbedding):
+    def __init__(self, model_provider: BaseModelProvider, name: str):
+        credentials = model_provider.get_model_credentials(
+            model_name=name,
+            model_type=self.type
+        )
+
+        client = XinferenceEmbeddings(
+            **credentials,
+        )
+
+        super().__init__(model_provider, client, name)
+
+    def handle_exceptions(self, ex: Exception) -> Exception:
+        if isinstance(ex, (ModelError, ReplicateError)):
+            return LLMBadRequestError(f"Xinference embedding: {str(ex)}")
+        else:
+            return ex

api/core/model_providers/providers/xinference_provider.py

@@ -4,6 +4,7 @@ from typing import Type
 from langchain.llms import Xinference
 
 from core.helper import encrypter
+from core.model_providers.models.embedding.xinference_embedding import XinferenceEmbedding
 from core.model_providers.models.entity.model_params import KwargRule, ModelKwargsRules, ModelType
 from core.model_providers.models.llm.xinference_model import XinferenceModel
 from core.model_providers.providers.base import BaseModelProvider, CredentialsValidateFailedError
@@ -32,6 +33,8 @@ class XinferenceProvider(BaseModelProvider):
         """
         if model_type == ModelType.TEXT_GENERATION:
             model_class = XinferenceModel
+        elif model_type == ModelType.EMBEDDINGS:
+            model_class = XinferenceEmbedding
         else:
             raise NotImplementedError
 

api/tests/integration_tests/models/embedding/test_xinference_embedding.py

+import json
+import os
+from unittest.mock import patch, MagicMock
+
+from core.model_providers.models.embedding.xinference_embedding import XinferenceEmbedding
+from core.model_providers.models.entity.model_params import ModelType
+from core.model_providers.providers.xinference_provider import XinferenceProvider
+from models.provider import Provider, ProviderType, ProviderModel
+
+
+def get_mock_provider():
+    return Provider(
+        id='provider_id',
+        tenant_id='tenant_id',
+        provider_name='xinference',
+        provider_type=ProviderType.CUSTOM.value,
+        encrypted_config='',
+        is_valid=True,
+    )
+
+
+def get_mock_embedding_model(mocker):
+    model_name = 'vicuna-v1.3'
+    server_url = os.environ['XINFERENCE_SERVER_URL']
+    model_uid = os.environ['XINFERENCE_MODEL_UID']
+    model_provider = XinferenceProvider(provider=get_mock_provider())
+
+    mock_query = MagicMock()
+    mock_query.filter.return_value.first.return_value = ProviderModel(
+        provider_name='xinference',
+        model_name=model_name,
+        model_type=ModelType.EMBEDDINGS.value,
+        encrypted_config=json.dumps({
+            'server_url': server_url,
+            'model_uid': model_uid
+        }),
+        is_valid=True,
+    )
+    mocker.patch('extensions.ext_database.db.session.query', return_value=mock_query)
+
+    return XinferenceEmbedding(
+        model_provider=model_provider,
+        name=model_name
+    )
+
+
+def decrypt_side_effect(tenant_id, encrypted_api_key):
+    return encrypted_api_key
+
+
+@patch('core.helper.encrypter.decrypt_token', side_effect=decrypt_side_effect)
+def test_embed_documents(mock_decrypt, mocker):
+    embedding_model = get_mock_embedding_model(mocker)
+    rst = embedding_model.client.embed_documents(['test', 'test1'])
+    assert isinstance(rst, list)
+    assert len(rst) == 2
+    assert len(rst[0]) == 4096
+
+
+@patch('core.helper.encrypter.decrypt_token', side_effect=decrypt_side_effect)
+def test_embed_query(mock_decrypt, mocker):
+    embedding_model = get_mock_embedding_model(mocker)
+    rst = embedding_model.client.embed_query('test')
+    assert isinstance(rst, list)
+    assert len(rst) == 4096