MarkLogic Node.js Client API

Namespace: DatabaseClient

DatabaseClient

A client object configured to write, read, query, and perform other operations on a database as a user. The client object is created by the marklogic.createDatabaseClient function.

Members

#config

Provides access to namespaces that configure the REST server for the client. The client must have been created for a user with the rest-admin role.
Properties:
Name Type Description
extlibs config.extlibs provides functions that maintain the extension libraries on the REST server
patch.replace config.patch.replace provides functions that maintain patch replacement libraries on the REST server
query.custom config.query.custom provides functions that maintain custom query binding or facet extensions on the REST server
query.snippet config.query.snippet provides functions that maintain query snippet extensions on the REST server
resources config.resources provides functions that maintain resource service extensions on the REST server
serverprops config.serverprops provides functions that modify the properties of the REST server
transforms config.transforms provides functions that maintain transform extensions on the REST server
Since:
  • 1.0

#documents :documents

Provides functions that write, read, query, or perform other operations on documents in the database. As a convenience, the same functions are provided on the database client.
Type:
Since:
  • 1.0

#graphs :graphs

Provides functions that read, write, merge, remove, list, or query with SPARQL on triple graphs.
Type:
Since:
  • 1.0

#resources :resources

Provides functions that submit get, put, post, or remove requests to resource service extensions.
Type:
Since:
  • 1.0

#rows :rows

Provides functions for performing relational operations on indexed values and documents in the database.
Type:
Since:
  • 2.1.1

#transactions :transactions

Provides functions that open, commit, or rollback multi-statement transactions.
Type:
Since:
  • 1.0

#values :values

Provides functions that submit values queries to project tuples (rows) of values from documents.
Type:
Since:
  • 1.0

Methods

createCollection(collection, content) → {ResultProvider}

Creates one or more JSON documents for a collection; takes a collection name string and the content for one or more JSON documents (or an array of content). The server assigns uri identifiers to the documents created with the content. The documents#write function is less simple but more complete, accepting a uri identifier and metadata (such as multiple collections) and optionally transforming each document on the server.
Parameters:
Name Type Description
collection string the name of the collection for the documents
content object | Array.<object> the objects with the content for the documents
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback receiving an array of uri strings for the created documents.
Type
ResultProvider

createTimestamp(value) → {Timestamp}

Creates a timestamp object.
Parameters:
Name Type Argument Description
value string <optional>
 a timestamp value as a string.
Since:
  • 2.1.1
Returns:
- a Timestamp object.
Type
Timestamp

eval(source, variables, txid) → {ResultProvider}

Evaluates JavaScript on the server; the user for the database client must have permission to evaluate code on the server and, in addition, permission to execute the actions performed by the source; takes a configuration object with the following named parameters or, as a shortcut, the source with or without variables.
Parameters:
Name Type Argument Description
source string the JavaScript source code
variables object <optional>
 an object in which each property has a variable name as a key and a number, string, or boolean value
txid string | transactions.Transaction <optional>
 a string transaction id or Transaction object identifying an open multi-statement transaction
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives the response
Type
ResultProvider

invoke(path, variables, txid) → {ResultProvider}

Invokes a JavaScript or XQuery module on the server; the user for the database client must have permission to invoke modules on the server and, in addition, permission to execute the actions performed by the module; takes a configuration object with the following named parameters or, as a shortcut, the path with or without variables.
Parameters:
Name Type Argument Description
path string the path of the module in the modules database for the REST server; the module must have been installed previously (typically with the config.extlibs#write function) using a filename extension (mjs, sjs, or xqy by default) registered for server JavaScript or XQuery in the server mime types table
variables object <optional>
 an object in which each property has a variable name as a key and a number, string, or boolean value; the key may be in Clark notation for namespaced XQuery variables
txid string | transactions.Transaction <optional>
 a string transaction id or Transaction object identifying an open multi-statement transaction
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives the response
Type
ResultProvider

probe(uri) → {ResultProvider}

Probes whether a document exists; takes a uri string identifying the document. The documents#probe function is less simple but more complete, returning an object with additional information.
Parameters:
Name Type Description
uri string the uri for the database document
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives a boolean.
Type
ResultProvider

queryCollection(collection, query) → {ResultProvider}

Executes a query to retrieve the content of documents in a collection, optionally adding a query built by a queryBuilder to retrieve a subset of the collection documents. The documents#query function is less simple but more complete, potentially transforming documents on the server and returning an envelope object for each document with the uri and metadata as well as the content. an object for each document with additional information.
Parameters:
Name Type Argument Description
collection string the name of the document collection
query object <optional>
 a query built by a queryBuilder
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives an array with the content of the documents.
Type
ResultProvider

read(uris) → {ResultProvider}

Reads one or more documents; takes one or more uri strings or an array of uri strings. The documents#read function is less simple but more complete, potentially transforming documents on the server and returning an envelope object for each document with the uri and metadata as well as the content.
Parameters:
Name Type Description
uris string | Array.<string> the uri string or an array of uri strings for the database documents
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives an array with the content of the documents.
Type
ResultProvider

remove(uris) → {ResultProvider}

Removes one or more database documents; takes one or more uri strings identifying the document. The documents#remove function is less simple but more complete.
Parameters:
Name Type Description
uris string | Array.<string> the uri string or an array of uri strings identifying the database documents
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives an array of the uris identifying the removed documents.
Type
ResultProvider

removeCollection(collection) → {ResultProvider}

Removes all documents in a collection; takes the uri string identifying the collection. The documents#removeAll function is less simple but more complete, supporting deleting a directory or all documents in the database.
Parameters:
Name Type Description
collection string the collection whose documents should be deleted
Since:
  • 1.0
Returns:
an object with a result() function takes a success callback that receives the uri string identifying the removed collection.
Type
ResultProvider

setAuthToken(token)

Supplies a new authentication token to be used in subsequent requests instead of the current authentication token. Note: the token must be a SAML authentication token.
Parameters:
Name Type Description
token string an authentication token
Since:
  • 2.2.0

setLogger(logger, isErrorFirst)

Supplies a logger to use for database interactions or, instead, takes a logging level from the debug|info|warn|error|silent enumeration (where silent is the initial setting) for the default console logger.
Parameters:
Name Type Argument Description
logger object an object providing debug(), info(), warn(), and error() logging methods such as a logger provided by the Bunyan or Winston logging libraries.
isErrorFirst boolean <optional>
 whether an error should be logged as the first parameter; must be provided as true for Bunyan (but not for Winston); defaults to false
Since:
  • 1.0

testConnection()

Tests if a connection is successful.
Since:
  • 2.1
Returns:
an object with a connected property of true or false. In the false case it contains httpStatusCode and httpStatusMessage properties identifying the failure.

writeCollection(collection, documents) → {ResultProvider}

Inserts or updates one or more documents for a collection; takes a collection name string and an object that maps document uris to document content. The documents#write function is less simple but more complete, accepting a uri identifier and metadata (such as multiple collections) and optionally transforming each document on the server.
Parameters:
Name Type Description
collection string the name of the collection for the documents
documents object an object in which every key is the uri string for a document and every value is the content for the document
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback receiving an array of uri strings for the written documents.
Type
ResultProvider

xqueryEval(source, variables, txid) → {ResultProvider}

Evaluates XQuery on the server; the user for the database client must have permission to evaluate code on the server and, in addition, permission to execute the actions performed by the source; takes a configuration object with the following named parameters or, as a shortcut, the source with or without variables.
Parameters:
Name Type Argument Description
source string the XQuery source code
variables object <optional>
 an object in which each property has a variable name as a key and a number, string, or boolean value; the key may be a namespaced name in Clark notation
txid string | transactions.Transaction <optional>
 a string transaction id or Transaction object identifying an open multi-statement transaction
Since:
  • 1.0
Returns:
an object whose result() function takes a success callback that receives the response
Type
ResultProvider

Type Definitions

Timestamp

An object representing a timestamp on the server.
Type:
  • object
Since:
  • 2.1.1
Copyright (c) 2020 MarkLogic Corporation Documentation generated by JSDoc 3.6.4 on 2020-08-04T23:55:49-07:00 using the DocStrap template.