Method deleteEdge

packages/y-graph-storage/src/YGraphStorage.ts:361–382

(id: ElementId)

  }

  public deleteEdge(id: ElementId): void {
    const [label, uuid] = parseElementId(id);
    const collection = this.getEdgeCollectionMap(label);
    const data = collection.get(uuid);
    if (data == null) {
      throw new EdgeNotFoundError(id);
    }
    // inV is the target, outV is the source
    const inV = data.get($InVKey) as ElementId;
    const outV = data.get($OutVKey) as ElementId;
    const inVMap = this.getVertexMap(inV);
    const outVMap = this.getVertexMap(outV);
    this.transact(() => {
      // Remove from target's incoming edges
      const incomingEdges = inVMap.get($InEKey) as undefined | Y.Map<unknown>;
      incomingEdges?.delete(id);
      // Remove from source's outgoing edges
      const outgoingEdges = outVMap.get($OutEKey) as undefined | Y.Map<unknown>;
      outgoingEdges?.delete(id);
      collection.delete(uuid);
    });
  }

  protected getVertexMap(vertexId: ElementId): Y.Map<unknown> {
    const [label, uuid] = parseElementId(vertexId);