make_model: support changing data when exporting

src/util/make_model.js

@@ -213,9 +213,19 @@ export default (options={}) => {
 		export(options={}) {
 			let _data = this.data()
 
+			if (typeof options.filter == 'function') {
+				_data = options.filter(_data)
+			}
+
 			if (options.type == 'csv') {
 				let headers = _configs.selects && _configs.selects.map(select => select.alias || select.label) || Object.keys(_data[0])
 
+				if (options.generated_columns) {
+					options.generated_columns.forEach(column => {
+						headers.splice(column.position, 0, column.label)
+					})
+				}
+
 				let body = _data.map(row => headers.map(key => row[key]).join(',')).join('\n')
 
 				_data = '\ufeff' + headers.join(',') + '\n' + body