mirror of https://github.com/AMT-Cheif/drift.git
21 lines
589 B
Dart
21 lines
589 B
Dart
import 'package:drift/drift.dart';
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import 'tables/filename.dart';
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extension Expressions on MyDatabase {
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// #docregion emptyCategories
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Future<List<Category>> emptyCategories() {
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final hasNoTodo = notExistsQuery(
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select(todos)..where((row) => row.category.equalsExp(categories.id)));
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return (select(categories)..where((row) => hasNoTodo)).get();
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}
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// #enddocregion emptyCategories
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}
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// #docregion bitwise
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Expression<int> bitwiseMagic(Expression<int> a, Expression<int> b) {
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// Generates `~(a | b)` in SQL.
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return ~(a.bitwiseAnd(b));
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}
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// #enddocregion bitwise
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