__init__.py 文件源码

def get_migrations(application, from_version=None, to_version=None):
    from plone.server import app_settings

    if from_version:
        from_version = parse_version(from_version)
    if to_version:
        to_version = parse_version(to_version)

    applications = app_settings['applications'] + ['plone.server']
    migrations = []
    for migration in _migrations:
        if migration.application != application or migration.application not in applications:
            continue
        if from_version and migration.to_version <= from_version:
            continue
        if to_version and migration.to_version > to_version:
            continue
        if migration.application not in applications:
            continue
        migrations.append(migration)

    migrations.sort()
    return migrations