refactor: migrate to PostgreSQL + Sequelize

server/models/_relations.js

@@ -0,0 +1,10 @@
+'use strict'
+
+/**
+ * Associate DB Model relations
+ */
+module.exports = db => {
+  db.User.belongsToMany(db.Group, { through: 'UserGroups' })
+  db.Group.hasMany(db.Right, { as: 'GroupRights' })
+  db.File.belongsTo(db.Folder)
+}