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Add generic types for Node#labels, Relationship#type and UnboundRelationship#type by bigmontz · Pull Request #1014 · neo4j/neo4j-javascript-driver · GitHub
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Add generic types for Node#labels, Relationship#type and UnboundRelationship#type #1014
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…ionship#type This generic types enable defining a list string like values accepted for an specific node labels list or relationship type. Node example: ```typescript type PersonLabels = 'Person' | 'Actor' // get the person from a non-typed record. If the record is correctly type-mapped // the Node type can be omitted since it will be inferred. const person: Node<Integer, PersonProps, PersonLabels> = record.get('person') // get labels // the type inferred for the labels will be PersonLabels[] const labels = person.labels // @ts-exepct-error const wrongLables: 'Car'|'Bicycle'[] = person.labels ``` Relationship/UnboundRelationship example: ```typescript type ActedInType = 'ACTED_IN' // get the relationship from a non-typed record. If the record is correctly type mapped // the Relationship type can be omitted since it will be inferred. const actedIn: Relationship<Integer, ActedInProps, ActedInType> = record.get('actedIn') // get type // the type inferred for the relType will be 'ACTED_IN' const relType = actedIn.type // @ts-expect-error const directed: 'DIRECTED' = actedIn.type ```⚠️ This type definitions are not asserted in runtime. Thus mismatched type records coming from the database will not trigger type errors.
robsdedude
approved these changes
Nov 14, 2022
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This generic types enable defining a list string like values accepted for an specific node labels list or relationship type.
Node example:
Relationship/UnboundRelationship example: