to_json() — langchain Function Reference

Architecture documentation for the to_json() function in graph.py from the langchain codebase.

Function python LangChainCore Runnables calls 2

Entity Profile

LangChainCore→ Runnables→ to_json() — langchain Function Reference

Dependency Diagram

graph TD
  436d3a55_ec61_7819_2986_6664246558c2["to_json()"]
  646f3bb5_a594_563e_cfbf_e18bdc9efb90["Graph"]
  436d3a55_ec61_7819_2986_6664246558c2 -->|defined in| 646f3bb5_a594_563e_cfbf_e18bdc9efb90
  06f839e9_c953_ef45_72b3_7929f39522ed["is_uuid()"]
  436d3a55_ec61_7819_2986_6664246558c2 -->|calls| 06f839e9_c953_ef45_72b3_7929f39522ed
  34379327_05b8_129e_590e_63948fab3a3d["node_data_json()"]
  436d3a55_ec61_7819_2986_6664246558c2 -->|calls| 34379327_05b8_129e_590e_63948fab3a3d
  style 436d3a55_ec61_7819_2986_6664246558c2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/graph.py lines 264–299

    def to_json(self, *, with_schemas: bool = False) -> dict[str, list[dict[str, Any]]]:
        """Convert the graph to a JSON-serializable format.

        Args:
            with_schemas: Whether to include the schemas of the nodes if they are
                Pydantic models.

        Returns:
            A dictionary with the nodes and edges of the graph.
        """
        stable_node_ids = {
            node.id: i if is_uuid(node.id) else node.id
            for i, node in enumerate(self.nodes.values())
        }
        edges: list[dict[str, Any]] = []
        for edge in self.edges:
            edge_dict = {
                "source": stable_node_ids[edge.source],
                "target": stable_node_ids[edge.target],
            }
            if edge.data is not None:
                edge_dict["data"] = edge.data  # type: ignore[assignment]
            if edge.conditional:
                edge_dict["conditional"] = True
            edges.append(edge_dict)

        return {
            "nodes": [
                {
                    "id": stable_node_ids[node.id],
                    **node_data_json(node, with_schemas=with_schemas),
                }
                for node in self.nodes.values()
            ],
            "edges": edges,
        }