migration_tool.py 文件源码

def _get_relevant_migrations(migration_scripts, current_version, new_version):
    relevant_migrations = []
    for migration in migration_scripts:
        migration_original_version, migration_new_version = _get_migration_versions(
            migration)
        if not migration_original_version or not migration_new_version:
            continue

        if Upgrader.compareVersions(current_version, new_version) >= 0:
            if Upgrader.compareVersions(
                    migration_new_version, migration_original_version) > 0:
                continue
            if Upgrader.compareVersions(migration_original_version, current_version) <= 0 \
                    and Upgrader.compareVersions(migration_new_version, new_version) >= 0:
                relevant_migrations.append(migration)
        else:
            if Upgrader.compareVersions(
                    migration_original_version, migration_new_version) > 0:
                continue
            if Upgrader.compareVersions(migration_original_version, current_version) >= 0 \
                    and Upgrader.compareVersions(migration_new_version, new_version) <= 0:
                relevant_migrations.append(migration)
        relevant_migrations = sorted(
            relevant_migrations, key=cmp_to_key(_compare_migration_scripts))
    return relevant_migrations