Referring to a Specific Version

引用特定版本

We can pass a specific version number to upgrade. Alembic will ensure that all revisions upon which this version depends are invoked, and nothing more. So if we upgrade either to 27c6a30d7c24 or ae1027a6acf specifically, it guarantees that 1975ea83b712 will have been applied, but not that any “sibling” versions are applied:

我们可以将特定的版本号传递给upgrade。 Alembic 将确保调用此版本所依赖的所有修订，仅此而已。 因此，如果我们将upgrade 升级到27c6a30d7c24 或ae1027a6acf，它保证会应用1975ea83b712，但不会应用任何 “兄弟” 版本：

$ alembic upgrade 27c6a
INFO  [alembic.migration] Running upgrade  -> 1975ea83b712, create account table
INFO  [alembic.migration] Running upgrade 1975ea83b712 -> 27c6a30d7c24, add shopping cart table

With 1975ea83b712 and 27c6a30d7c24 applied, ae1027a6acf is just a single additional step:

应用 1975ea83b712 和 27c6a30d7c24 后，ae1027a6acf 只是一个额外的步骤：

$ alembic upgrade ae102
INFO  [alembic.migration] Running upgrade 1975ea83b712 -> ae1027a6acf, add a column