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feat: add chromadb #74
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,161 @@ | ||
| /* | ||
| Copyright 2023 KubeAGI. | ||
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| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
|
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| http://www.apache.org/licenses/LICENSE-2.0 | ||
|
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| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
| package chromadb | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "net/http" | ||
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| chroma "github.com/amikos-tech/chroma-go" | ||
| openapiclient "github.com/amikos-tech/chroma-go/swagger" | ||
| "github.com/tmc/langchaingo/schema" | ||
| vs "github.com/tmc/langchaingo/vectorstores" | ||
| ) | ||
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| type chromadb struct { | ||
| option *option | ||
| client *chroma.Client | ||
| } | ||
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| func NewChromaDB(opts ...Option) (vs.VectorStore, error) { | ||
| store := &chromadb{option: &option{host: "http://localhost", port: 8000, textKey: "text", distanceFunc: chroma.L2}} | ||
| for _, opt := range opts { | ||
| opt(store.option) | ||
| } | ||
| if err := store.verify(); err != nil { | ||
| return nil, err | ||
| } | ||
| c := http.DefaultClient | ||
| if store.option.transport != nil { | ||
| c = &http.Client{ | ||
| Transport: store.option.transport, | ||
| } | ||
| } | ||
| cfg := openapiclient.Configuration{ | ||
| Servers: openapiclient.ServerConfigurations{ | ||
| { | ||
| URL: fmt.Sprintf("%s:%d", store.option.host, store.option.port), | ||
| Description: "chromadb server", | ||
| }, | ||
| }, | ||
| HTTPClient: c, | ||
| } | ||
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| store.client = &chroma.Client{ApiClient: openapiclient.NewAPIClient(&cfg)} | ||
| return store, nil | ||
| } | ||
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| func (c *chromadb) verify() error { | ||
| if c.option.collectionName == "" { | ||
| return fmt.Errorf("collectioName can't be empty") | ||
| } | ||
| if c.option.embeddr == nil { | ||
| return fmt.Errorf("embedder is empty") | ||
| } | ||
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| return nil | ||
| } | ||
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| func (c *chromadb) getOptions(options ...vs.Option) vs.Options { | ||
| opts := vs.Options{} | ||
| for _, opt := range options { | ||
| opt(&opts) | ||
| } | ||
| return opts | ||
| } | ||
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| // find where and where documents | ||
| func (c *chromadb) getFilter(opts vs.Options) (map[string]interface{}, map[string]interface{}) { | ||
| mustBeArray, ok := opts.Filters.([]interface{}) | ||
| if !ok { | ||
| return nil, nil | ||
| } | ||
| if len(mustBeArray) != 2 { | ||
| return nil, nil | ||
| } | ||
| a, oka := mustBeArray[0].(map[string]interface{}) | ||
| b, okb := mustBeArray[1].(map[string]interface{}) | ||
| if oka && okb { | ||
| return a, b | ||
| } | ||
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| return nil, nil | ||
| } | ||
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| func (c *chromadb) addDocuments(ctx context.Context, texts, ids []string, metadatas []map[string]interface{}) error { | ||
| localEmbedder := &LocalEmbedder{Embedder: c.option.embeddr} | ||
| collection, err := c.client.CreateCollection(c.option.collectionName, map[string]interface{}{}, true, localEmbedder, c.option.distanceFunc) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| vectors, err := localEmbedder.CreateEmbedding(texts) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if len(vectors) != len(texts) { | ||
| return fmt.Errorf("number of vectors from embedder does not match number of documents") | ||
| } | ||
| _, err = collection.Add(vectors, metadatas, texts, ids) | ||
| return err | ||
| } | ||
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| func (c *chromadb) AddDocuments(ctx context.Context, docs []schema.Document, options ...vs.Option) error { | ||
| texts := make([]string, 0, len(docs)) | ||
| ids := make([]string, len(docs)) | ||
| for idx, doc := range docs { | ||
| texts = append(texts, doc.PageContent) | ||
| ids[idx] = fmt.Sprintf("%d", idx) | ||
| } | ||
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| metadatas := make([]map[string]interface{}, 0) | ||
| for i := 0; i < len(docs); i++ { | ||
| metadata := make(map[string]interface{}) | ||
| for k, v := range docs[i].Metadata { | ||
| metadata[k] = v | ||
| } | ||
| metadata[c.option.textKey] = texts[i] | ||
| metadatas = append(metadatas, metadata) | ||
| } | ||
| return c.addDocuments(ctx, texts, ids, metadatas) | ||
| } | ||
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| func (c *chromadb) SimilaritySearch(ctx context.Context, query string, numDocuments int, options ...vs.Option) ([]schema.Document, error) { | ||
| localEmbedder := &LocalEmbedder{Embedder: c.option.embeddr} | ||
| collection, err := c.client.GetCollection(c.option.collectionName, localEmbedder) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| opts := c.getOptions(options...) | ||
| where, whereDocument := c.getFilter(opts) | ||
| result, err := collection.Query([]string{query}, int32(numDocuments), where, whereDocument, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| dl := len(result.Documents[0]) | ||
| documents := make([]schema.Document, dl) | ||
| // {"ids":[["0001","0003"]],"distances":[[0.0005762028712337219,0.0005762028712337219]],"metadatas":[[{"chapter":"3","verse":"16"},{"chapter":"29","verse":"11"}]],"embeddings":null,"documents":[["doc1","doc3"]]} | ||
| for i := 0; i < dl; i++ { | ||
| doc := schema.Document{ | ||
| Metadata: result.Metadatas[0][i], | ||
| PageContent: result.Documents[0][i], | ||
| } | ||
| documents[i] = doc | ||
| } | ||
|
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| return documents, nil | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| /* | ||
| Copyright 2023 KubeAGI. | ||
|
|
||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
|
|
||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
|
|
||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
| package chromadb |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| /* | ||
| Copyright 2023 KubeAGI. | ||
|
|
||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
|
|
||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
|
|
||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
| package chromadb | ||
|
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| import ( | ||
| "context" | ||
|
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| "github.com/tmc/langchaingo/embeddings" | ||
| ) | ||
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| type LocalEmbedder struct { | ||
| embeddings.Embedder | ||
| } | ||
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| func (l *LocalEmbedder) CreateEmbedding(documents []string) ([][]float32, error) { | ||
| vectors, err := l.Embedder.EmbedDocuments(context.TODO(), documents) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| target := make([][]float32, len(vectors)) | ||
| for row := 0; row < len(vectors); row++ { | ||
| target[row] = make([]float32, len(vectors[row])) | ||
| for col := 0; col < len(vectors[row]); col++ { | ||
| target[row][col] = float32(vectors[row][col]) | ||
| } | ||
| } | ||
| return target, nil | ||
| } | ||
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| func (l *LocalEmbedder) CreateEmbeddingWithModel(documents []string, model string) ([][]float32, error) { | ||
| return l.CreateEmbedding(documents) | ||
| } |
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We should consider to implement a go client by our own