updateRelations method

  1. @visibleForTesting
Future<void> updateRelations(
  1. Relation rel
)

Implementation

@visibleForTesting
Future<void> updateRelations(Relation rel) async {
  if (rel.tableType == SatRelation_RelationType.TABLE) {
    // this relation may be for a newly created table
    // or for a column that was added to an existing table
    final tableName = rel.table;

    if (relations[tableName] == null) {
      int id = 0;
      // generate an id for the new relation as (the highest existing id) + 1
      // TODO: why not just use the relation.id coming from pg?
      for (final r in relations.values) {
        if (r.id > id) {
          id = r.id;
        }
      }
      final relation = rel.copyWith(
        id: id + 1,
      );
      relations[tableName] = relation;
    } else {
      // the relation is for an existing table
      // update the information but keep the same ID
      final id = relations[tableName]!.id;
      final relation = rel.copyWith(id: id);
      relations[tableName] = relation;
    }
  }
}