Composite ID
This metadata allows you to create a composite key.
| Metadata Property Name | Type Signature |
|---|---|
JpaCompositeId | com.braintribe.model.accessdeployment.jpa.meta.JpaCompositeId |
General
You can only attach this metadata to an ID property. Only a composite ID consisting of up to 30 columns is supported.
Configuration
To configure, simply add the JpaCompositeId metadata to the ID property of your entity. Read, update, and delete operations in the database are fully supported.
Creating new instances in a database is supported only if the ID is given explicitly, so when a properly formatted String value is set to the id property by the user. The proper format is a comma-separated concatenation of the individual values. The format for different types is a GM string.
For more information, see the
instanceToGmString()method of theScalarTypeclass.