refactor: migrate to objection.js + knex

server/models_old/_relations.js

@@ -0,0 +1,16 @@
+/**
+ * Associate DB Model relations
+ */
+module.exports = db => {
+  db.User.belongsToMany(db.Group, { through: 'userGroups' })
+  db.Group.belongsToMany(db.User, { through: 'userGroups' })
+  db.Group.hasMany(db.Right)
+  db.Right.belongsTo(db.Group)
+  db.Document.belongsToMany(db.Tag, { through: 'documentTags' })
+  db.Document.hasMany(db.Comment)
+  db.Tag.belongsToMany(db.Document, { through: 'documentTags' })
+  db.File.belongsTo(db.Folder)
+  db.Folder.hasMany(db.File)
+  db.Comment.belongsTo(db.Document)
+  db.Comment.belongsTo(db.User, { as: 'author' })
+}