GraphVertexCollection | arangojs

Represents a DocumentCollection of vertices in a Graph.

Type parameters

T: object

Type to use for document data. Defaults to any.

Hierarchy

GraphVertexCollection

Implements

ArangoCollection

Index

Accessors

Methods

Accessors

collection

get collection(): DocumentCollection<T>

A DocumentCollection instance for this vertex collection.

Returns DocumentCollection<T>

graph

get graph(): Graph

The Graph instance this vertex collection is bound to.

Returns Graph

isArangoCollection

get isArangoCollection(): true

internal

Indicates that this object represents an ArangoDB collection.

Returns true

name

get name(): string

Name of the collection.

Returns string

Methods

remove

remove(selector: DocumentSelector, options?: GraphCollectionRemoveOptions): Promise<DocumentMetadata & { old?: Document<T> }>

Removes an existing vertex from the collection.

Throws an exception when passed a vertex or _id from a different collection.
example
```
const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
await collection.remove("abc123");
// document with key "abc123" deleted
```
example
```
const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
const doc = await collection.vertex("abc123");
await collection.remove(doc);
// document with key "abc123" deleted
```
Parameters
- selector: DocumentSelector
  
  Document _key, _id or object with either of those properties (e.g. a vertex from this collection).
- Optional options: GraphCollectionRemoveOptions
  
  Options for removing the vertex.
Returns Promise<DocumentMetadata & { old?: Document<T> }>

replace

replace(selector: DocumentSelector, newValue: DocumentData<T>, options?: GraphCollectionReplaceOptions): Promise<DocumentMetadata & { new?: Document<T>; old?: Document<T> }>

Replaces an existing vertex in the collection.

Throws an exception when passed a vertex or _id from a different collection.
example
```
const graph = db.graph("some-graph");
const collection = graph.collection("vertices");
await collection.save({ _key: "a", color: "blue", count: 1 });
const result = await collection.replace(
  "a",
  { color: "red" },
  { returnNew: true }
);
console.log(result.new.color, result.new.count); // "red" undefined
```
Parameters
- selector: DocumentSelector
  
  Document _key, _id or object with either of those properties (e.g. a vertex from this collection).
- newValue: DocumentData<T>
- Optional options: GraphCollectionReplaceOptions
  
  Options for replacing the vertex.
Returns Promise<DocumentMetadata & { new?: Document<T>; old?: Document<T> }>

save

save(data: DocumentData<T>, options?: GraphCollectionInsertOptions): Promise<DocumentMetadata & { new?: Document<T> }>

Inserts a new vertex with the given data into the collection.

example

const graph = db.graph("some-graph");
const collection = graph.vertexCollection("friends");
const result = await collection.save(
  { _key: "a", color: "blue", count: 1 },
  { returnNew: true }
);
console.log(result.new.color, result.new.count); // "blue" 1

Parameters

data: DocumentData<T>

The contents of the new vertex.
Optional options: GraphCollectionInsertOptions

Options for inserting the vertex.

Returns Promise<DocumentMetadata & { new?: Document<T> }>

update

update(selector: DocumentSelector, newValue: Patch<DocumentData<T>>, options?: GraphCollectionReplaceOptions): Promise<DocumentMetadata & { new?: Document<T>; old?: Document<T> }>

Updates an existing vertex in the collection.

Throws an exception when passed a vertex or _id from a different collection.
example
```
const graph = db.graph("some-graph");
const collection = graph.collection("vertices");
await collection.save({ _key: "a", color: "blue", count: 1 });
const result = await collection.update(
  "a",
  { count: 2 },
  { returnNew: true }
);
console.log(result.new.color, result.new.count); // "blue" 2
```
Parameters
- selector: DocumentSelector
  
  Document _key, _id or object with either of those properties (e.g. a vertex from this collection).
- newValue: Patch<DocumentData<T>>
- Optional options: GraphCollectionReplaceOptions
  
  Options for updating the vertex.
Returns Promise<DocumentMetadata & { new?: Document<T>; old?: Document<T> }>

vertex

vertex(selector: DocumentSelector, options?: GraphCollectionReadOptions): Promise<Document<T>>
vertex(selector: DocumentSelector, graceful: boolean): Promise<Document<T>>

Retrieves the vertex matching the given key or id.

Throws an exception when passed a vertex or _id from a different collection.

example

const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
try {
  const vertex = await collection.vertex("abc123");
  console.log(vertex);
} catch (e) {
  console.error("Could not find vertex");
}

example

const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
const vertex = await collection.vertex("abc123", { graceful: true });
if (vertex) {
  console.log(vertex);
} else {
  console.error("Could not find vertex");
}

Parameters

selector: DocumentSelector

Document _key, _id or object with either of those properties (e.g. a vertex from this collection).
Optional options: GraphCollectionReadOptions

Options for retrieving the vertex.

Returns Promise<Document<T>>

Retrieves the vertex matching the given key or id.

Throws an exception when passed a vertex or _id from a different collection.

example

const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
try {
  const vertex = await collection.vertex("abc123", false);
  console.log(vertex);
} catch (e) {
  console.error("Could not find vertex");
}

example

const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
const vertex = await collection.vertex("abc123", true);
if (vertex) {
  console.log(vertex);
} else {
  console.error("Could not find vertex");
}

Parameters

selector: DocumentSelector

Document _key, _id or object with either of those properties (e.g. a vertex from this collection).
graceful: boolean

If set to true, null is returned instead of an exception being thrown if the vertex does not exist.

Returns Promise<Document<T>>

vertexExists

vertexExists(selector: DocumentSelector): Promise<boolean>

Checks whether a vertex matching the given key or id exists in this collection.

Throws an exception when passed a vertex or _id from a different collection.
example
```
const graph = db.graph("some-graph");
const collection = graph.vertexCollection("vertices");
const exists = await collection.vertexExists("abc123");
if (!exists) {
  console.log("Vertex does not exist");
}
```
Parameters
- selector: DocumentSelector
  
  Document _key, _id or object with either of those properties (e.g. a vertex from this collection).
Returns Promise<boolean>

Type parameters

T: object

Hierarchy

Implements

Index

Accessors

Methods

Accessors

collection

Returns DocumentCollection<T>

graph

Returns Graph

isArangoCollection

Returns true

name

Returns string

Methods

remove

Parameters

selector: DocumentSelector

Optional options: GraphCollectionRemoveOptions

Returns Promise<DocumentMetadata & { old?: Document<T> }>

replace

Parameters

selector: DocumentSelector

newValue: DocumentData<T>

Optional options: GraphCollectionReplaceOptions

Returns Promise<DocumentMetadata & { new?: Document<T>; old?: Document<T> }>

save

Parameters

data: DocumentData<T>

Optional options: GraphCollectionInsertOptions

Returns Promise<DocumentMetadata & { new?: Document<T> }>

update

Parameters

selector: DocumentSelector

newValue: Patch<DocumentData<T>>

Optional options: GraphCollectionReplaceOptions

Returns Promise<DocumentMetadata & { new?: Document<T>; old?: Document<T> }>

vertex

Parameters

selector: DocumentSelector

Optional options: GraphCollectionReadOptions

Returns Promise<Document<T>>

Parameters

selector: DocumentSelector

graceful: boolean

Returns Promise<Document<T>>

vertexExists

Parameters

selector: DocumentSelector

Returns Promise<boolean>