@directus/api/dist/database/migrations/20201105A-add-cascade-system-relations.js

Directus is a real-time API and App dashboard for managing SQL database content

//#region src/database/migrations/20201105A-add-cascade-system-relations.ts
const updates = [
	{
		table: "directus_fields",
		constraints: [{
			column: "group",
			references: "directus_fields.id"
		}]
	},
	{
		table: "directus_files",
		constraints: [
			{
				column: "folder",
				references: "directus_folders.id"
			},
			{
				column: "uploaded_by",
				references: "directus_users.id"
			},
			{
				column: "modified_by",
				references: "directus_users.id"
			}
		]
	},
	{
		table: "directus_folders",
		constraints: [{
			column: "parent",
			references: "directus_folders.id"
		}]
	},
	{
		table: "directus_permissions",
		constraints: [{
			column: "role",
			references: "directus_roles.id"
		}]
	},
	{
		table: "directus_presets",
		constraints: [{
			column: "user",
			references: "directus_users.id"
		}, {
			column: "role",
			references: "directus_roles.id"
		}]
	},
	{
		table: "directus_revisions",
		constraints: [{
			column: "activity",
			references: "directus_activity.id"
		}, {
			column: "parent",
			references: "directus_revisions.id"
		}]
	},
	{
		table: "directus_sessions",
		constraints: [{
			column: "user",
			references: "directus_users.id"
		}]
	},
	{
		table: "directus_settings",
		constraints: [
			{
				column: "project_logo",
				references: "directus_files.id"
			},
			{
				column: "public_foreground",
				references: "directus_files.id"
			},
			{
				column: "public_background",
				references: "directus_files.id"
			}
		]
	},
	{
		table: "directus_users",
		constraints: [{
			column: "role",
			references: "directus_roles.id"
		}]
	}
];
/**
* NOTE:
* Not all databases allow (or support) recursive onUpdate/onDelete triggers. MS SQL / Oracle flat out deny creating them,
* Postgres behaves erratic on those triggers, not sure if MySQL / Maria plays nice either.
*/
async function up(knex) {
	for (const update of updates) await knex.schema.alterTable(update.table, (table) => {
		for (const constraint of update.constraints) {
			table.dropForeign([constraint.column]);
			table.foreign(constraint.column).references(constraint.references);
		}
	});
}
async function down(knex) {
	for (const update of updates) await knex.schema.alterTable(update.table, (table) => {
		for (const constraint of update.constraints) table.dropForeign([constraint.column]);
	});
}

//#endregion
export { down, up };