Source code for langchain.tools.graphql.tool
import json
from typing import Optional
from langchain.callbacks.manager import CallbackManagerForToolRun
from langchain.tools.base import BaseTool
from langchain.utilities.graphql import GraphQLAPIWrapper
[docs]class BaseGraphQLTool(BaseTool):
    """Base tool for querying a GraphQL API."""
    graphql_wrapper: GraphQLAPIWrapper
    name: str = "query_graphql"
    description: str = """\
    Input to this tool is a detailed and correct GraphQL query, output is a result from the API.
    If the query is not correct, an error message will be returned.
    If an error is returned with 'Bad request' in it, rewrite the query and try again.
    If an error is returned with 'Unauthorized' in it, do not try again, but tell the user to change their authentication.
    Example Input: query {{ allUsers {{ id, name, email }} }}\
    """  # noqa: E501
    class Config:
        """Configuration for this pydantic object."""
        arbitrary_types_allowed = True
    def _run(
        self,
        tool_input: str,
        run_manager: Optional[CallbackManagerForToolRun] = None,
    ) -> str:
        result = self.graphql_wrapper.run(tool_input)
        return json.dumps(result, indent=2)