Update Chroma_Existing.ts to add metadatafilter

packages/components/nodes/vectorstores/Chroma/Chroma_Existing.ts

@@ -51,6 +51,13 @@ class Chroma_Existing_VectorStores implements INode {
                 type: 'string',
                 optional: true
             },
+            {
+                label: 'Chroma Metadata Filter',
+                name: 'chromaMetadataFilter',
+                type: 'json',
+                optional: true,
+                additionalParams: true
+            },
             {
                 label: 'Top K',
                 name: 'topK',
@@ -86,13 +93,18 @@ class Chroma_Existing_VectorStores implements INode {
         const credentialData = await getCredentialData(nodeData.credential ?? '', options)
         const chromaApiKey = getCredentialParam('chromaApiKey', credentialData, nodeData)
 
+        const chromaMetadataFilter = nodeData.inputs?.chromaMetadataFilter;
+        const metadataFilter = chromaMetadataFilter ? JSON.parse(chromaMetadataFilter) : {};
+
         const obj: {
             collectionName: string
             url?: string
             chromaApiKey?: string
+            metadataFilter?: any
         } = { collectionName }
         if (chromaURL) obj.url = chromaURL
         if (chromaApiKey) obj.chromaApiKey = chromaApiKey
+        if (chromaMetadataFilter) obj.metadataFilter = metadataFilter
 
         const vectorStore = await ChromaExtended.fromExistingCollection(embeddings, obj)