getCountByFilterEx method
Gets a count of data items retrieved by a given filter.
This method shall be called by a public getCountByFilter method from child class that receives FilterParams and converts them into a filter function.
correlationId
(optional) transaction id to trace execution through call chain.filter
(optional) a filter JSON object Return Future that receives a data list. Throw error
Implementation
Future<int> getCountByFilterEx(
String? correlationId, Map<String, dynamic>? filter) async {
// Configure options
var query = mngquery.SelectorBuilder();
var selector = <String, dynamic>{};
if (filter != null && filter.isNotEmpty) {
selector[r'$query'] = filter;
}
var count = await collection?.count(query) ?? 0;
logger.trace(correlationId, 'Find %d items in %s', [count, collectionName]);
return count;
}