MigrationBase

Complexity

Total Complexity

4

Size/Duplication

Total Lines	16
Duplicated Lines	0 %

4 Methods

Rating	Name	Duplication	Size	Complexity
A	apply()	0	5	1
A	__init__()	0	2	1
A	set_version()	0	2	1
A	is_applicable()	0	3	1

import transaction


class MigrationBase(object):
    def __init__(self, root):
        self.root = root

    @classmethod
    def is_applicable(cls, root):
        return getattr(root, '_db_version', 0) < cls.DB_VERSION

    def set_version(self):
        self.root._db_version = self.DB_VERSION

    def apply(self):
        transaction.begin()
        self.forward()
        self.set_version()
        transaction.commit()