Revert using mapFromRow() for matched tables in queries

moor/lib/src/runtime/api/query_engine.dart

@@ -300,10 +300,11 @@ mixin QueryEngine on DatabaseConnectionUser {
 
   /// Will be used by generated code to resolve inline Dart components in sql.
   @protected
-  GenerationContext $write(Component component) {
-    // for good measure, act like there are multiple tables. This will make
-    // column references be explicit about their table name.
-    final context = GenerationContext.fromDb(this)..hasMultipleTables = true;
+  GenerationContext $write(Component component, {bool hasMultipleTables}) {
+    final context = GenerationContext.fromDb(this);
+    if (hasMultipleTables != null) {
+      context.hasMultipleTables = hasMultipleTables;
+    }
 
     // we don't want ORDER BY clauses to write the ORDER BY tokens because those
     // are already declared in sql

moor/test/data/tables/custom_tables.g.dart

@@ -1113,7 +1113,10 @@ abstract class _$CustomTablesDb extends GeneratedDatabase {
   Email _email;
   Email get email => _email ??= Email(this);
   Config _rowToConfig(QueryRow row) {
-    return config.mapFromRow(row);
+    return Config(
+      configKey: row.readString('config_key'),
+      configValue: row.readString('config_value'),
+    );
   }
 
   Selectable<Config> readConfig(String var1) {
@@ -1155,7 +1158,11 @@ abstract class _$CustomTablesDb extends GeneratedDatabase {
   }
 
   EMail _rowToEMail(QueryRow row) {
-    return email.mapFromRow(row);
+    return EMail(
+      sender: row.readString('sender'),
+      title: row.readString('title'),
+      body: row.readString('body'),
+    );
   }
 
   Selectable<EMail> searchEmails(String term) {

moor/test/data/tables/todos.g.dart

@@ -1372,7 +1372,13 @@ abstract class _$TodoDb extends GeneratedDatabase {
   }
 
   TodoEntry _rowToTodoEntry(QueryRow row) {
-    return todosTable.mapFromRow(row);
+    return TodoEntry(
+      id: row.readInt('id'),
+      title: row.readString('title'),
+      content: row.readString('content'),
+      targetDate: row.readDateTime('target_date'),
+      category: row.readInt('category'),
+    );
   }
 
   Selectable<TodoEntry> withInQuery(String var1, String var2, List<int> var3) {
@@ -1493,7 +1499,13 @@ mixin _$SomeDaoMixin on DatabaseAccessor<TodoDb> {
   $SharedTodosTable get sharedTodos => db.sharedTodos;
   $TodosTableTable get todosTable => db.todosTable;
   TodoEntry _rowToTodoEntry(QueryRow row) {
-    return todosTable.mapFromRow(row);
+    return TodoEntry(
+      id: row.readInt('id'),
+      title: row.readString('title'),
+      content: row.readString('content'),
+      targetDate: row.readDateTime('target_date'),
+      category: row.readInt('category'),
+    );
   }
 
   Selectable<TodoEntry> todosForUserQuery(int user) {

moor_generator/lib/src/writer/queries/query_writer.dart

@@ -98,22 +98,15 @@ class QueryWriter {
         ..write('${_select.resultClassName} ${_nameOfMappingMethod()}')
         ..write('(QueryRow row) {\n');
 
-      // If we're matching an existing table from moor - let's just use the
-      // mapping method we're generating for each table!
-      if (_select.resultSet.matchingTable != null) {
-        final table = _select.resultSet.matchingTable;
-        _buffer.write('return ${table.tableFieldName}.mapFromRow(row);\n');
-      } else {
-        // For more complex results, generate a custom constructor call
-        _buffer.write('return ${_select.resultClassName}(');
-        for (final column in _select.resultSet.columns) {
-          final fieldName = _select.resultSet.dartNameFor(column);
-          _buffer.write('$fieldName: ${_readingCode(column)},');
-        }
-
-        _buffer.write(');\n');
+      // note that, even if the result set has a matching table, we can't just
+      // use the mapFromRow() function of that table - the column names might
+      // be different!
+      _buffer.write('return ${_select.resultClassName}(');
+      for (final column in _select.resultSet.columns) {
+        final fieldName = _select.resultSet.dartNameFor(column);
+        _buffer.write('$fieldName: ${_readingCode(column)},');
       }
-      _buffer.write('}\n');
+      _buffer.write(');\n}\n');
 
       _writtenMappingMethods.add(_nameOfMappingMethod());
     }