arangodb/Documentation/Books/Drivers/JS/Reference/Collection/DocumentCollection.md

DocumentCollection API

The DocumentCollection API extends the Collection API with the following methods.

documentCollection.document

async documentCollection.document(documentHandle): Object

Retrieves the document with the given documentHandle from the collection.

Arguments

• documentHandle: string

  The handle of the document to retrieve. This can be either the _id or the _key of a document in the collection, or a document (i.e. an object with an _id or _key property).

Examples

const db = new Database();
const collection = db.collection('my-docs');

try {
  const doc = await collection.document('some-key');
  // the document exists
  assert.equal(doc._key, 'some-key');
  assert.equal(doc._id, 'my-docs/some-key');
} catch (err) {
  // something went wrong or
  // the document does not exist
}

// -- or --

try {
  const doc = await collection.document('my-docs/some-key');
  // the document exists
  assert.equal(doc._key, 'some-key');
  assert.equal(doc._id, 'my-docs/some-key');
} catch (err) {
  // something went wrong or
  // the document does not exist
}

documentCollection.save

async documentCollection.save(data, [opts]): Object

Creates a new document with the given data and returns an object containing the document's metadata.

Arguments

• data: Object

  The data of the new document, may include a _key.

• opts: Object (optional)

  If opts is set, it must be an object with any of the following properties:

  • waitForSync: boolean (Default: false)

    Wait until document has been synced to disk.

  • returnNew: boolean (Default: false)

    If set to true, return additionally the complete new documents under the attribute new in the result.

  • silent: boolean (Default: false)

    If set to true, an empty object will be returned as response. No meta-data will be returned for the created document. This option can be used to save some network traffic.

If a boolean is passed instead of an options object, it will be interpreted as the returnNew option.

For more information on the opts object, see the HTTP API documentation for working with documents.

Examples

const db = new Database();
const collection = db.collection('my-docs');
const data = {some: 'data'};
const info = await collection.save(data);
assert.equal(info._id, 'my-docs/' + info._key);
const doc2 = await collection.document(info)
assert.equal(doc2._id, info._id);
assert.equal(doc2._rev, info._rev);
assert.equal(doc2.some, data.some);

// -- or --

const db = new Database();
const collection = db.collection('my-docs');
const data = {some: 'data'};
const opts = {returnNew: true};
const doc = await collection.save(data, opts)
assert.equal(doc1._id, 'my-docs/' + doc1._key);
assert.equal(doc1.new.some, data.some);