Search results
25 lut 2017 · neo4j (2.0.1) does not currently support a uniqueness constraint that covers multiple properties simultaneously. However, I can think of a workaround that might be acceptable, depending on your use cases. Let's say you want properties a, b, and c to be unique as a group.
Neo4j offers several constraints to ensure the quality and integrity of data in a graph. The following constraints are available in Neo4j: Property uniqueness constraints ensure that the combined property values are unique for all nodes with a specific label or all relationships with a specific type.
Constraints are created with the CREATE CONSTRAINT command. When creating a constraint, it is recommended to provide a constraint name. This name must be unique among both indexes and constraints. If a name is not explicitly given, a unique name will be auto-generated. Creating a constraint requires the CREATE CONSTRAINT privilege.
This page describes how to use indexes and constraints in the Neo4j GraphQL Library. You can use the @fulltext directive to specify a full-text index inside Neo4j. For example: input FullTextInput { indexName: String queryName: String fields: [String]!
The syntax for creating a unique constraint on a property is: FOR (n: LabelName) The constraint is for a property on all nodes with a specified label. The constraint_name is optional, but it is good practice to specify one. If you do not specify a constraint name, Neo4j will create one for you.
In Neo4j, you can create uniqueness constraints and property existence constraints. Uniqueness Constraint Specifies that the property must contain a unique value (i.e. no two nodes with an Artist label can share a value for the Name property.)
Here is the syntax for creating a uniqueness constraint for a set of properties: FOR (x: <node_label>) This constraint ensures that a set of values for a node’s properties will be unique. Execute this code to create a uniqueness constraint for the Movie.released and Movie.title properties: FOR (x: Movie)
