langchain_community.graphs.arangodb_graph.ArangoGraph

class langchain_community.graphs.arangodb_graph.ArangoGraph(db: Any)

ArangoDB wrapper for graph operations.

Security note: Make sure that the database connection uses credentials

that are narrowly-scoped to only include necessary permissions. Failure to do so may result in data corruption or loss, since the calling code may attempt commands that would result in deletion, mutation of data if appropriately prompted or reading sensitive data if such data is present in the database. The best way to guard against such negative outcomes is to (as appropriate) limit the permissions granted to the credentials used with this tool.

See https://python.langchain.com/docs/security for more information.

Create a new ArangoDB graph wrapper instance.

Attributes

db
schema

Methods

__init__(db)	Create a new ArangoDB graph wrapper instance.
from_db_credentials([url, dbname, username, ...])	Convenience constructor that builds Arango DB from credentials.
generate_schema([sample_ratio])	Generates the schema of the ArangoDB Database and returns it User can specify a sample_ratio (0 to 1) to determine the ratio of documents/edges used (in relation to the Collection size) to render each Collection Schema.
query(query[, top_k])	Query the ArangoDB database.
set_db(db)
set_schema([schema])	Set the schema of the ArangoDB Database.

Parameters

db (Any) –

__init__(db: Any) → None

Create a new ArangoDB graph wrapper instance.

Parameters

db (Any) –

Return type

None

classmethod from_db_credentials(url: Optional[str] = None, dbname: Optional[str] = None, username: Optional[str] = None, password: Optional[str] = None) → Any

Convenience constructor that builds Arango DB from credentials.

Parameters

• url (Optional[str]) – Arango DB url. Can be passed in as named arg or set as environment var ARANGODB_URL. Defaults to “http://localhost:8529”.

• dbname (Optional[str]) – Arango DB name. Can be passed in as named arg or set as environment var ARANGODB_DBNAME. Defaults to “_system”.

• username (Optional[str]) – Can be passed in as named arg or set as environment var ARANGODB_USERNAME. Defaults to “root”.

• password (Optional[str]) – Can be passed ni as named arg or set as environment var ARANGODB_PASSWORD. Defaults to “”.

Returns

An arango.database.StandardDatabase.

Return type

Any

generate_schema(sample_ratio: float = 0) → Dict[str, List[Dict[str, Any]]]

Generates the schema of the ArangoDB Database and returns it User can specify a sample_ratio (0 to 1) to determine the ratio of documents/edges used (in relation to the Collection size) to render each Collection Schema.

Parameters

sample_ratio (float) –

Return type

Dict[str, List[Dict[str, Any]]]

query(query: str, top_k: Optional[int] = None, **kwargs: Any) → List[Dict[str, Any]]

Query the ArangoDB database.

Parameters

• query (str) –

• top_k (Optional[int]) –

• kwargs (Any) –

Return type

List[Dict[str, Any]]

set_db(db: Any) → None

Parameters

db (Any) –

Return type

None

set_schema(schema: Optional[Dict[str, Any]] = None) → None

Set the schema of the ArangoDB Database. Auto-generates Schema if schema is None.

Parameters

schema (Optional[Dict[str, Any]]) –

Return type

None

Examples using ArangoGraph

• ArangoDB QA chain