Custom fields feature.

server/src/models/ViewRole.js

@@ -0,0 +1,22 @@
+import bookshelf from './bookshelf';
+
+const ViewRole = bookshelf.Model.extend({
+  /**
+   * Table name.
+   */
+  tableName: 'view_roles',
+
+  /**
+   * Timestamp columns.
+   */
+  hasTimestamps: false,
+
+  /**
+   * View role model may belongs to view model.
+   */
+  view() {
+    return this.belongsTo('View', 'view_id');
+  },
+});
+
+export default bookshelf.model('ViewRole', ViewRole);