linkCreating Relationships

A QueryRunner instance can be used for creating relationships from Objects. Information and where parameters about the source and target nodes can be used.

1link/* --> let 'queryRunner' be a QueryRunner instance */

2linkconst result = await queryRunner.createRelationship({

3link    source: {

4link        /* --> (optional) the label of the source Node to be matched --> */

5link        label: 'Users',

6link        /* --> (optional) the identifier of the source Node th be used in the query. Defaults to the value of 'QueryRunner.identifiers.createRelationship.source' */

7link        identifier: 'source'

8link    },

9link    target: {

10link        /* --> (optional) the label of the target Node to be matched --> */

11link        label: 'Orders',

12link        /* --> (optional) the identifier of the source Node th be used in the query. Defaults to the value of 'QueryRunner.identifiers.createRelationship.target' */

13link        identifier: 'target'

14link    },

15link    relationship: {

16link        /* --> the name of the relationship */

17link        name: 'CREATES',

18link        /* --> the direction of this relationship, between source and target. Valid values are 'in', 'out', 'none' */

19link        direction: 'out',

20link        /* --> (optional) properties of the relationship */

21link        properties: {

22link            rating: 4

23link        }

24link    },

25link    /* --> (optional) the where clause for the source and target nodes to be matched. A param object or a Where instance can be used. The source/target identifiers needs to be used as keys */

26link    where: { // @see [Where](../Where-Parameters)

27link        /* --> where params for the source Node. The source identifier needs to be used as a key */

28link        source: {

29link            id: {

30link        /* --> using the "in" Symbol from "Op" */

31link                [Op.in]: ['1', '2']

32link            }

33link        },

34link        /* --> where params for the target Node. The target identifier needs to be used as a key */

35link        target: {

36link            name: 'Bob'

37link        },

38link    },

39link    /* --> (optional) an existing session or transaction to use */

40link    session: null,

41link});

42link

43link/* --> the result is the QueryResult from the neo4j driver */

44linkconsole.log(result);