Comments (1)
Most methods in the query builder are built with extensions. This is so that Expression<int>
and Expression<String>
can have different methods on them. Extension members are resolved statically though, and so if you cast to dynamic
they won't be available.
If you want to be able to re-use some columns in different tables, the approach described in #2866 may be a useful resource. But even without special setup, you can fix your code:
Future<int> queryCount<T extends Table, D extends DataClass>({
required TableInfo<T, D> tableInfo,
required Expression<bool> whereExpr,
}) async {
final count = ((tableInfo as dynamic).id as Expression<int>).count();
Or, without any dynamic thanks to runtime schema introspection:
final count = (tableInfo.columnsByName['id'] as Expression<int>).count();
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Related Issues (20)
- 404 link in QueryExecutor class documentation HOT 1
- Renew DriftDatabase usage example HOT 1
- feat: Declare column on table with `late final`
- Unhandled Exception: Bad state: Tried to send Request ... over isolate channel, but the connection was closed! HOT 3
- DevTools extension not working in 2.19.1 HOT 1
- [Android web] wasm issue HOT 8
- Schema dump fails in flutter with drift_dev 2.19 HOT 2
- Seeing multiple instances of SqliteException(13), SqliteException(14), and SqliteException(5) in the wild HOT 9
- CountAll not available HOT 5
- Columns from queries are suddenly nullable since Drift 2.19 HOT 6
- DB stops HOT 8
- Setup doc contains unexecutable code. HOT 3
- Drift file generating incorrect typings HOT 4
- Refactor `QueryExecutor` to reliably indicate which methods write
- Distribute reads across multiple isolates HOT 1
- Improve performance of `InsertStatement.createContext` in batches HOT 3
- Potential OOM error on both Android & iOS HOT 8
- Why DOES THIS PACKAGE NOT WORK HOT 2
- SQLite - Migrator Bug? Regression from 2.18.0 => 2.19.x when adding nullable columns to table with data HOT 17
- Web WASM: "RuntimeError: illegal cast at DriftCommunication._handleMessage" HOT 7
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