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import chromadb
from .BaseDB import BaseDB
import random
import string
import os
from tqdm import tqdm
class ChromaDB(BaseDB):
def __init__(self,embedding,save_type = "persistent"):
self.collections = {}
self.embedding = embedding
base_dir = os.path.dirname(os.path.abspath(__file__))
if save_type == "persistent":
self.path = os.path.join(base_dir, "./chromadb_saves/")
self.client = chromadb.PersistentClient(path = self.path)
else:
self.client = chromadb.Client()
def init_from_data(self, data, db_name):
if db_name in [c.name for c in self.client.list_collections()]:
self.collections[db_name] = self.client.get_collection(name=db_name,embedding_function=self.embedding)
else:
self.collections[db_name] = self.client.create_collection(name=db_name,embedding_function=self.embedding)
if len(data) != 0:
for i in tqdm(list(range(self.collections[db_name].count()+1,len(data)))):
self.collections[db_name].update(
documents=[data[i]],
ids=[str(i)]
)
return
def search(self, query, n_results, db_name):
if db_name not in self.collections:return []
n_results = min(self.collections[db_name].count(), n_results)
if n_results < 1:
return []
results = self.collections[db_name].query(query_texts=[query], n_results=n_results)
return results['documents'][0]
def add(self,text,idx, db_name=""):
if db_name not in self.collections:
self.collections[db_name] = self.client.create_collection(
name=db_name,
embedding_function=self.embedding
)
self.collections[db_name].add(
documents=[text],
ids=[idx]
)
return
collection = self.collections[db_name]
existing_doc = collection.get(ids=[idx])
if existing_doc and existing_doc['ids']:
collection.update(
documents=[text],
ids=[idx]
)
else:
collection.add(
documents=[text],
ids=[idx]
)
def delete(self,idx,db_name):
self.collections[db_name].delete(ids=[idx])
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