Bugfix/implement missing delete method on pgvector (#3180)

implement missing delete method on pgvector

packages/components/nodes/vectorstores/Postgres/Postgres.ts

@@ -191,6 +191,18 @@ class Postgres_VectorStores implements INode {
                         return await similaritySearchVectorWithScore(query, k, tableName, postgresConnectionOptions, filter)
                     }
 
+                    vectorStore.delete = async (params: { ids: string[] }): Promise<void> => {
+                        const { ids } = params
+
+                        if (ids?.length) {
+                            try {
+                                vectorStore.appDataSource.getRepository(vectorStore.documentEntity).delete(ids)
+                            } catch (e) {
+                                console.error('Failed to delete')
+                            }
+                        }
+                    }
+
                     await recordManager.createSchema()
 
                     const res = await index({

packages/server/src/services/documentstore/index.ts

@@ -597,11 +597,8 @@ const processAndSaveChunks = async (data: IDocumentStoreLoaderForPreview) => {
         const newLoaderId = data.id ?? uuidv4()
         const found = existingLoaders.find((ldr: IDocumentStoreLoader) => ldr.id === newLoaderId)
         if (found) {
-            // clean up the current status and mark the loader as pending_sync
+            const foundIndex = existingLoaders.findIndex((ldr: IDocumentStoreLoader) => ldr.id === newLoaderId)
-            found.totalChunks = 0
+
-            found.totalChars = 0
-            found.status = DocumentStoreStatus.SYNCING
-            entity.loaders = JSON.stringify(existingLoaders)
             if (!data.loaderId) data.loaderId = found.loaderId
             if (!data.loaderName) data.loaderName = found.loaderName
             if (!data.loaderConfig) data.loaderConfig = found.loaderConfig
@@ -611,6 +608,25 @@ const processAndSaveChunks = async (data: IDocumentStoreLoaderForPreview) => {
             if (found.credential) {
                 data.credential = found.credential
             }
+
+            let loader: IDocumentStoreLoader = {
+                ...found,
+                loaderId: data.loaderId,
+                loaderName: data.loaderName,
+                loaderConfig: data.loaderConfig,
+                splitterId: data.splitterId,
+                splitterName: data.splitterName,
+                splitterConfig: data.splitterConfig,
+                totalChunks: 0,
+                totalChars: 0,
+                status: DocumentStoreStatus.SYNCING
+            }
+            if (data.credential) {
+                loader.credential = data.credential
+            }
+
+            existingLoaders[foundIndex] = loader
+            entity.loaders = JSON.stringify(existingLoaders)
         } else {
             let loader: IDocumentStoreLoader = {
                 id: newLoaderId,