linkGetting Started

linkInstalling

1link$npm i neogma

1link$yarn add neogma

linkImporting

The used classes and functions can be imported as follows:

1linkconst { BindParam, ModelFactory, Neogma, QueryBuilder, QueryRunner, Where, Literal, getSession, Op, neo4jDriver } = require('neogma');

1linkimport { BindParam, ModelFactory, Neogma, QueryBuilder, QueryRunner, Where, Literal, getSession, Op, neo4jDriver } from 'neogma';

2link// importing types

3linkimport { 

4link    /* --> used in Model definition */

5link    ModelRelatedNodesI, 

6link    NeogmaInstance, 

7link    /* --> all possible neo4j types which can be used in Models */

8link    Neo4jSupportedTypes 

9link} from 'neogma';

The neo4jDriver exports everything from the neo4j-driver package, including types, validators, etc:

1link/* --> validator */

2linkneo4jDriver.Date();

3link/* --> type contructor */

4linkneo4jDriver.types.DateTime();

5link/* --> typescript interface */

6linkneo4jDriver.Point;

linkInitializing

To get started, a Neogma instance needs to be initialized

1linkconst neogma = new Neogma(

2link    {

3link        url: 'bolt://localhost:7687',

4link        username: 'neo4j',

5link        password: 'password',

6link        /* --> (optional) the database to be used by default for sessions */

7link        database: 'myDb',

8link    },

9link    {

10link        /* --> (optional) logs every query that Neogma runs, using the given function */

11link        logger: console.log, 

12link        /* --> any driver configuration can be used */

13link        encrypted: true,

14link    }

15link);

This instance must be used when defining Models.

linkVerify connectivity

You can run

1linkawait neogma.verifyConnectivity();

If there is a connectivity error in either the neogma initialization, or with verifyConnectivity, a NeogmaConnectivityError error will be thrown.

linkUtilities

It also has the neo4j Driver and a QueryRunner instance. For more information about how to run your own queries and other non-model operations, refer to its documentation.

1link/* --> gets the neo4j driver */

2linkconst driver = neogma.driver;

3link/* --> gets the QueryRunner instance used by this neogma instance */

4linkconst queryRunner = neogma.queryRunner;

5link/* --> wrapper for getSession */

6linkconst getSession = neogma.getSession; // @see [Sessions](./Sessions)

7link/* --> the defined Models by their names */

8linkconst modelsByName = neogma.modelsByName; // @see [Defining a Model](./Models/Defining-a-Model)