@tanglemedia/directus-collection-flex-editor/migrations/20251231C-tngl_flex-~-set-relations-content-and-content_nodes.mjs

Creates the flex table and some basic related nodes like image, resource, embed, and section

const COLLECTION_M2M_FILE = "tngl_flex_content_nodes";
const RELATED_COLLECTION = "tngl_flex_content";
const RELATED_COLLECTION_ID = "tngl_flex_content_id";
const SUBCOLLECTIONS = [
	"tngl_node_resource",
	"tngl_node_image",
	"tngl_node_section",
	"tngl_node_embed",
];

export async function up(knex) {


	let allowedCollectionsPromises = SUBCOLLECTIONS.map((subCollection) => {
		return knex.schema.hasTable(subCollection);
	});

	allowedCollectionsPromises = await Promise.all(allowedCollectionsPromises);
	const finalAllowedCollections = SUBCOLLECTIONS.filter(
		(subCollection, index) => allowedCollectionsPromises[index]
	);

	// register relations between tngl_menu and tngl_menu_item to `directus_relations` table
	// for full list of directus_relations properties, refer to: https://docs.directus.io/reference/system/relations.html
	await knex("directus_relations").insert([
		{
			many_collection: COLLECTION_M2M_FILE,
			many_field: RELATED_COLLECTION_ID,
			one_collection: RELATED_COLLECTION,
			one_field: "editor_nodes",
			one_collection_field: null,
			one_allowed_collections: null,
			junction_field: "item",
			sort_field: "sort",
			one_deselect_action: "delete",
		},
		{
			many_collection: COLLECTION_M2M_FILE,
			many_field: "item",
			one_collection: null,
			one_field: null,
			one_collection_field: "collection",
			one_allowed_collections: [...finalAllowedCollections].join(","),
			junction_field: RELATED_COLLECTION_ID,
			sort_field: null,
			one_deselect_action: "nullify",
		},
	]);
}

export async function down(knex) {
	//remove associated data from directus_relations table
	await knex("directus_relations")
		.where("many_collection", COLLECTION_M2M_FILE)
		.del();
}