Class Graph

Adds an edge definition to this graph.

Example

const db = new Database();
const graph = db.graph("some-graph");
await graph.addEdgeDefinition({
  collection: "edges",
  from: ["start-vertices"],
  to: ["end-vertices"],
});
// The edge definition has been added to the graph

Adds the given collection to this graph as a vertex collection.

Example

const db = new Database();
const graph = db.graph("some-graph");
await graph.addVertexCollection("more-vertices");
// The collection "more-vertices" has been added to the graph
const extra = db.collection("extra-vertices");
await graph.addVertexCollection(extra);
// The collection "extra-vertices" has been added to the graph

Creates a graph with the given edgeDefinitions and options for this graph's name.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
// graph now exists

Deletes the graph from the database.

Example

const db = new Database();
const graph = db.graph("some-graph");
await graph.drop();
// the graph "some-graph" no longer exists

Returns a GraphEdgeCollection instance for the given collection name representing the collection in this graph.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
const graphEdgeCollection = graph.edgeCollection("edges");
// Access the underlying EdgeCollection API:
const edgeCollection = graphEdgeCollection.collection;

Fetches all edge collections of this graph from the database and returns an array of GraphEdgeCollection instances.

See also listEdgeCollections.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
const graphEdgeCollections = await graph.edgeCollections();
for (const collection of graphEdgeCollection) {
  console.log(collection.name);
  // "edges"
}

Checks whether the graph exists.

Example

const db = new Database();
const graph = db.graph("some-graph");
const result = await graph.exists();
// result indicates whether the graph exists

Retrieves general information about the graph.

Example

const db = new Database();
const graph = db.graph("some-graph");
const data = await graph.get();
// data contains general information about the graph

Fetches all edge collections of this graph from the database and returns an array of their names.

See also edgeCollections.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
const edgeCollectionNames = await graph.listEdgeCollections();
// ["edges"]

Fetches all vertex collections of this graph from the database and returns an array of their names.

See also vertexCollections.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
const vertexCollectionNames = await graph.listVertexCollections();
// ["start-vertices", "end-vertices"]

Removes the edge definition for the given edge collection from this graph.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
await graph.removeEdgeDefinition("edges");
// The edge definition for "edges" has been replaced

Removes the given collection from this graph as a vertex collection.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
await graph.removeVertexCollection("start-vertices");
// The collection "start-vertices" is no longer part of the graph.

Replaces an edge definition in this graph. The existing edge definition for the given edge collection will be overwritten.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
await graph.replaceEdgeDefinition({
  collection: "edges",
  from: ["start-vertices"],
  to: ["other-vertices"],
});
// The edge definition for "edges" has been replaced

Replaces an edge definition in this graph. The existing edge definition for the given edge collection will be overwritten.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
await graph.replaceEdgeDefinition("edges", {
  collection: "edges",
  from: ["start-vertices"],
  to: ["other-vertices"],
});
// The edge definition for "edges" has been replaced

Performs a traversal starting from the given startVertex and following edges contained in this graph.

See also traversal.

Deprecated

Simple Queries have been deprecated in ArangoDB 3.4 and can be replaced with AQL queries.

Example

const db = new Database();
const graph = db.graph("my-graph");
const collection = graph.edgeCollection("edges").collection;
await collection.import([
  ["_key", "_from", "_to"],
  ["x", "vertices/a", "vertices/b"],
  ["y", "vertices/b", "vertices/c"],
  ["z", "vertices/c", "vertices/d"],
]);
const startVertex = "vertices/a";
const cursor = await db.query(aql`
  FOR vertex IN OUTBOUND ${startVertex} GRAPH ${graph}
  RETURN vertex._key
`);
const result = await cursor.all();
console.log(result); // ["a", "b", "c", "d"]

Returns a GraphVertexCollection instance for the given collection name representing the collection in this graph.

Fetches all vertex collections of this graph from the database and returns an array of GraphVertexCollection instances.

See also listVertexCollections.

Example

const db = new Database();
const graph = db.graph("some-graph");
const info = await graph.create([
  {
    collection: "edges",
    from: ["start-vertices"],
    to: ["end-vertices"],
  },
]);
const vertexCollections = await graph.vertexCollections();
for (const vertexCollection of vertexCollections) {
  console.log(vertexCollection.name);
  // "start-vertices"
  // "end-vertices"
}