- import all enums for database migrations (check constraints)

- npm updates

database/migrations/references_2_document_identifiers.ts

@@ -0,0 +1,45 @@
+import BaseSchema from '@ioc:Adonis/Lucid/Schema';
+import { IdentifierTypes } from 'Contracts/enums';
+
+export default class DocumentIdentifiers extends BaseSchema {
+    protected tableName = 'document_identifiers';
+
+    public async up() {
+        this.schema.createTable(this.tableName, (table) => {
+            table.increments('id').primary().defaultTo("nextval('document_identifiers_id_seq')")
+            table.integer('document_id').unsigned().notNullable();           
+            table
+                .foreign('document_id', 'document_identifiers_document_id_foreign')
+                .references('id')
+                .inTable('documents')
+                .onDelete('CASCADE') // delete this identifier when document is deleted
+                .onUpdate('CASCADE');
+            // table.string('type').notNullable();
+            table.enum('type', Object.keys(IdentifierTypes)).notNullable();           
+            table.string('value').notNullable();          
+            table.timestamp('created_at', { useTz: false }).nullable();
+            table.timestamp('updated_at', { useTz: false }).nullable();
+        });
+    }
+
+    public async down() {
+        this.schema.dropTable(this.tableName);
+    }
+}
+
+// -- Table: document_identifiers
+// CREATE TABLE IF NOT EXISTS document_identifiers
+// (
+//     id integer NOT NULL DEFAULT nextval('document_identifiers_id_seq'::regclass),
+//     document_id integer NOT NULL,
+//     type character varying(255) NOT NULL,
+//     value character varying(255) NOT NULL,
+//     created_at timestamp(0) without time zone,
+//     updated_at timestamp(0) without time zone,
+//     CONSTRAINT document_identifiers_pkey PRIMARY KEY (id),
+//     CONSTRAINT document_identifiers_document_id_foreign FOREIGN KEY (document_id)
+//         REFERENCES documents (id) MATCH SIMPLE
+//         ON UPDATE CASCADE
+//         ON DELETE CASCADE,
+//     CONSTRAINT document_identifiers_type_check CHECK (type::text = ANY (ARRAY['doi'::character varying::text, 'handle'::character varying::text, 'isbn'::character varying::text, 'issn'::character varying::text, 'url'::character varying::text, 'urn'::character varying::text]))
+// )