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perf(mongodb): execute skip and limit pagination database-side #189

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Merged
ZhuchkaTriplesix merged 1 commit into from
Jun 16, 2026
Merged

perf(mongodb): execute skip and limit pagination database-side #189

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33 changes: 18 additions & 15 deletions lib/core/database/mongodb_service.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -126,23 +126,26 @@ class MongoService {

return _withDb(connection, database, (db) async {
final coll = db.collection(collection);
final selector = filter ?? <String, dynamic>{};

final stream = coll.find(selector);
final results = <Map<String, dynamic>>[];
int count = 0;
await for (final doc in stream) {
if (skip != null && count < skip) {
count++;
continue;
}
if (limit != null && results.length >= limit) {
break;

final selector = where;
if (filter != null && filter.isNotEmpty) {
selector.raw(filter);
}
if (sort != null && sort.isNotEmpty) {
for (final entry in sort.entries) {
final isDesc = entry.value == -1 || entry.value == 'desc' || entry.value == 'DESC';
selector.sortBy(entry.key, descending: isDesc);
}
results.add(doc);
count++;
}
return results;
if (skip != null && skip > 0) {
selector.skip(skip);
}
if (limit != null && limit > 0) {
selector.limit(limit);
}

final stream = coll.find(selector);
return await stream.toList();
});
}

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