Bugfix/Get value with nested metadata filter (#3695)

add ability to get value with nested metadata filter

packages/components/nodes/tools/RetrieverTool/RetrieverTool.ts

@@ -3,10 +3,9 @@ import { CallbackManager, CallbackManagerForToolRun, Callbacks, parseCallbackCon
 import { BaseDynamicToolInput, DynamicTool, StructuredTool, ToolInputParsingException } from '@langchain/core/tools'
 import { BaseRetriever } from '@langchain/core/retrievers'
 import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
-import { getBaseClasses } from '../../../src/utils'
+import { getBaseClasses, resolveFlowObjValue } from '../../../src/utils'
 import { SOURCE_DOCUMENTS_PREFIX } from '../../../src/agents'
 import { RunnableConfig } from '@langchain/core/runnables'
-import { customGet } from '../../sequentialagents/commonUtils'
 import { VectorStoreRetriever } from '@langchain/core/vectorstores'
 
 const howToUse = `Add additional filters to vector store. You can also filter with flow config, including the current "state":
@@ -199,14 +198,7 @@ class Retriever_Tools implements INode {
 
                 const metadatafilter =
                     typeof retrieverToolMetadataFilter === 'object' ? retrieverToolMetadataFilter : JSON.parse(retrieverToolMetadataFilter)
-                const newMetadataFilter: any = {}
-                for (const key in metadatafilter) {
-                    let value = metadatafilter[key]
-                    if (value.startsWith('$flow')) {
-                        value = customGet(flowObj, value)
-                    }
-                    newMetadataFilter[key] = value
-                }
+                const newMetadataFilter = resolveFlowObjValue(metadatafilter, flowObj)
 
                 const vectorStore = (retriever as VectorStoreRetriever<any>).vectorStore
                 vectorStore.filter = newMetadataFilter