Custom fields feature.

server/src/models/ViewColumn.js

@@ -0,0 +1,19 @@
+import bookshelf from './bookshelf';
+
+const ViewColumn = bookshelf.Model.extend({
+  /**
+   * Table name.
+   */
+  tableName: 'view_columns',
+
+  /**
+   * Timestamp columns.
+   */
+  hasTimestamps: false,
+
+  view() {
+
+  }
+});
+
+export default bookshelf.model('ViewColumn', ViewColumn);