Include all getters row class -> insertable

Closes #3319

Author: simolus3

drift/example/repro.dart

@@ -0,0 +1,27 @@
+import 'package:drift/drift.dart';
+
+part 'repro.g.dart';
+
+@UseRowClass(User, generateInsertable: true)
+class Users extends Table {
+  IntColumn get id => integer().autoIncrement()();
+  TextColumn get some => text()();
+  TextColumn get some2 => text()();
+}
+
+class User implements Insertable<User> {
+  User({required this.id, required this.some, String? some2})
+      : some2 = some2 ?? some;
+
+  final int id;
+  final String some;
+  final String some2;
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    return toInsertable().toColumns(nullToAbsent);
+  }
+}
+
+@DriftDatabase(tables: [Users])
+class Database {}

drift/example/repro.g.dart

@@ -164,6 +164,13 @@ ExistingRowClass? validateExistingClass(
     }
   }
 
+  final getters = <String, String>{};
+  for (final column in columns) {
+    if (instantiation.getGetter(column.nameInDart) != null) {
+      getters[column.nameInSql] = column.nameInDart;
+    }
+  }
+
   return ExistingRowClass(
     targetClass: AnnotatedDartCode.topLevelElement(desiredClass),
     targetType: instantiation,
@@ -175,6 +182,7 @@ ExistingRowClass? validateExistingClass(
       for (final named in namedColumns.entries)
         named.key.name: named.value.nameInSql,
     },
+    columnGetters: getters,
     generateInsertable: generateInsertable,
     isAsyncFactory: isAsyncFactory,
   );
@@ -195,11 +203,13 @@ ExistingRowClass validateRowClassFromRecordType(
   };
 
   final namedColumns = <String, String>{};
+  final columnGetters = <String, String>{};
 
   for (final parameter in dartType.namedFields) {
     final column = unmatchedColumnsByName.remove(parameter.name);
     if (column != null) {
       namedColumns[parameter.name] = column.nameInSql;
+      columnGetters[column.nameInSql] = parameter.name;
 
       checkType(
         column.sqlType,
@@ -234,6 +244,7 @@ ExistingRowClass validateRowClassFromRecordType(
     positionalColumns: const [],
     namedColumns: namedColumns,
     generateInsertable: generateInsertable,
+    columnGetters: columnGetters,
   );
 }
 
@@ -261,6 +272,9 @@ ExistingRowClass defaultRecordRowClass({
     namedColumns: {
       for (final column in columns) column.nameInDart: column.nameInSql,
     },
+    columnGetters: {
+      for (final column in columns) column.nameInSql: column.nameInDart,
+    },
   );
 }