Weaviate Vector Store node

Use the Weaviate node to interact with your Weaviate collection as a vector store. You can insert documents into or retrieve documents from a vector database. You can also retrieve documents to provide them to a retriever connected to a chain or connect this node directly to an agent to use as a tool. On this page, you'll find the node parameters for the Weaviate node, and links to more resources.

Credentials: You can find authentication information for this node here.

Node usage patterns

You can use the Weaviate Vector Store node in the following patterns.

Use as a regular node to insert and retrieve documents

You can use the Weaviate Vector Store as a regular node to insert or get documents. This pattern places the Weaviate Vector Store in the regular connection flow without using an agent.

Connect directly to an AI agent as a tool

You can connect the Weaviate Vector Store node directly to the tool connector of an AI agent to use a vector store as a resource when answering queries.

Here, the connection would be: AI agent (tools connector) -> Weaviate Vector Store node.

Use a retriever to fetch documents

You can use the Vector Store Retriever node with the Weaviate Vector Store node to fetch documents from the Weaviate Vector Store node. This is often used with the Question and Answer Chain node to fetch documents from the vector store that match the given chat input.

Use the Vector Store Question Answer Tool to answer questions

Another pattern uses the Vector Store Question Answer Tool to summarize results and answer questions from the Weaviate Vector Store node. Rather than connecting the Weaviate Vector Store directly as a tool, this pattern uses a tool specifically designed to summarizes data in the vector store.

Node parameters

Multitenancy: You can separate your data into isolated tenants for the same collection (for example, for different customers). For that, you must always provide a Tenant Name both when inserting and retrieving objects. Read more about multi tenancy in Weaviate docs (opens in a new tab).

Get Many parameters

Weaviate Collection: Enter the name of the Weaviate collection to use.
Prompt: Enter the search query.
Limit: Enter how many results to retrieve from the vector store. For example, set this to 10 to get the ten best results.

Insert Documents parameters

Weaviate Collection: Enter the name of the Weaviate collection to use.
Embedding Batch Size: The number of documents to embed in a single batch. The default is 200 documents.

Retrieve Documents (As Vector Store for Chain/Tool) parameters

Weaviate Collection: Enter the name of the Weaviate collection to use.

Retrieve Documents (As Tool for AI Agent) parameters

Weaviate Collection: The name of the vector store.
Description: Explain to the LLM what this tool does. A good, specific description allows LLMs to produce expected results more often.
Weaviate Collection: Enter the name of the Weaviate collection to use.
Limit: Enter how many results to retrieve from the vector store. For example, set this to 10 to get the ten best results.

Include Metadata

Whether to include document metadata.

You can use this with the Get Many and Retrieve Documents (As Tool for AI Agent) modes.

Rerank Results

Node options

Search Filters

Available for the Get Many, Retrieve Documents (As Vector Store for Chain/Tool), and Retrieve Documents (As Tool for AI Agent) operation modes.

When searching for data, use this to match metadata associated with documents. You can learn more about the operators and query structure in Weaviate's conditional filters documentation (opens in a new tab).

You can use both AND and OR with different operators. Operators are case insensitive:

{
  "OR": [
    {
        "path": ["source"],
        "operator": "Equal",
        "valueString": "source1"
    },
    {
        "path": ["source"],
        "operator": "Equal",
        "valueString": "source1"
    }
  ]
}

Supported operators:

Operator	Required Field(s)	Description
`'equal'`	`valueString` or `valueNumber`	Checks if the property is equal to the given string or number.
`'like'`	`valueString`	Checks if the string property matches a pattern (for example, sub-string match).
`'containsAny'`	`valueTextArray` (string[])	Checks if the property contains any of the given values.
`'containsAll'`	`valueTextArray` (string[])	Checks if the property contains all of the given values.
`'greaterThan'`	`valueNumber`	Checks if the property value is greater than the given number.
`'lessThan'`	`valueNumber`	Checks if the property value is less than the given number.
`'isNull'`	`valueBoolean` (true/false)	Checks if the property is null or not. (must enable before ingestion (opens in a new tab))
`'withinGeoRange'`	`valueGeoCoordinates` (object with geolocation data)	Filters by proximity to geographic coordinates.

When inserting data, the document loader sets the metadata. Refer to Default Data Loader for more information on loading documents.

Metadata Keys

You can define which metadata keys you want Weaviate to return on your queries. This can reduce network load, as you will only get properties you have defined. Returns all properties from the server by default.

Available for the Get Many, Retrieve Documents (As Vector Store for Chain/Tool), and Retrieve Documents (As Tool for AI Agent) operation modes.

Tenant Name

The specific tenant to store or retrieve documents for.

Must enable at creation: You must pass a tenant name at first ingestion to enable multitenancy for a collection. You can't enable or disable multitenancy after creation.

Text Key

The key in the document that contains the embedded text.

Skip Init Checks

Whether to skip initialization checks (opens in a new tab) when instantiating the client.

Init Timeout

Number of seconds to wait before timing out (opens in a new tab) during initial checks.

Insert Timeout

Number of seconds to wait before timing out (opens in a new tab) during inserts.

Query Timeout

Number of seconds to wait before timing out (opens in a new tab) during queries.

GRPC Proxy

A proxy to use for gRPC requests.

Clear Data

Available for the Insert Documents operation mode.

Whether to clear the collection or tenant before inserting new data.

Related resources

Refer to LangChain's Weaviate documentation (opens in a new tab) for more information about the service.

Refer to Weaviate Installation (opens in a new tab) for a self hosted Weaviate Cluster.

Text Classifier node documentation Zep Vector Store node documentation