99 lines
3.5 KiB
Python
99 lines
3.5 KiB
Python
from typing import List, Dict, Optional
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from langchain.embeddings.base import Embeddings
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from langchain.schema import Document
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from langchain.vectorstores import Zilliz
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from configs import kbs_config
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from server.knowledge_base.kb_service.base import KBService, SupportedVSType, EmbeddingsFunAdapter, \
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score_threshold_process
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from server.knowledge_base.utils import KnowledgeFile
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class ZillizKBService(KBService):
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zilliz: Zilliz
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@staticmethod
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def get_collection(zilliz_name):
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from pymilvus import Collection
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return Collection(zilliz_name)
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# def save_vector_store(self):
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# if self.zilliz.col:
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# self.zilliz.col.flush()
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def get_doc_by_id(self, id: str) -> Optional[Document]:
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if self.zilliz.col:
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data_list = self.zilliz.col.query(expr=f'pk == {id}', output_fields=["*"])
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if len(data_list) > 0:
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data = data_list[0]
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text = data.pop("text")
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return Document(page_content=text, metadata=data)
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@staticmethod
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def search(zilliz_name, content, limit=3):
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search_params = {
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"metric_type": "IP",
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"params": {},
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}
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c = ZillizKBService.get_collection(zilliz_name)
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return c.search(content, "embeddings", search_params, limit=limit, output_fields=["content"])
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def do_create_kb(self):
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pass
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def vs_type(self) -> str:
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return SupportedVSType.ZILLIZ
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def _load_zilliz(self, embeddings: Embeddings = None):
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if embeddings is None:
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embeddings = self._load_embeddings()
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zilliz_args = kbs_config.get("zilliz")
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self.zilliz = Zilliz(embedding_function=EmbeddingsFunAdapter(embeddings),
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collection_name=self.kb_name, connection_args=zilliz_args)
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def do_init(self):
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self._load_zilliz()
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def do_drop_kb(self):
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if self.zilliz.col:
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self.zilliz.col.release()
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self.zilliz.col.drop()
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def do_search(self, query: str, top_k: int, score_threshold: float, embeddings: Embeddings):
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self._load_zilliz(embeddings=EmbeddingsFunAdapter(embeddings))
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return score_threshold_process(score_threshold, top_k, self.zilliz.similarity_search_with_score(query, top_k))
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def do_add_doc(self, docs: List[Document], **kwargs) -> List[Dict]:
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for doc in docs:
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for k, v in doc.metadata.items():
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doc.metadata[k] = str(v)
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for field in self.zilliz.fields:
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doc.metadata.setdefault(field, "")
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doc.metadata.pop(self.zilliz._text_field, None)
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doc.metadata.pop(self.zilliz._vector_field, None)
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ids = self.zilliz.add_documents(docs)
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doc_infos = [{"id": id, "metadata": doc.metadata} for id, doc in zip(ids, docs)]
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return doc_infos
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def do_delete_doc(self, kb_file: KnowledgeFile, **kwargs):
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if self.zilliz.col:
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filepath = kb_file.filepath.replace('\\', '\\\\')
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delete_list = [item.get("pk") for item in
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self.zilliz.col.query(expr=f'source == "{filepath}"', output_fields=["pk"])]
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self.zilliz.col.delete(expr=f'pk in {delete_list}')
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def do_clear_vs(self):
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if self.zilliz.col:
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self.do_drop_kb()
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self.do_init()
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if __name__ == '__main__':
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from server.db.base import Base, engine
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Base.metadata.create_all(bind=engine)
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zillizService = ZillizKBService("test")
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