Working with Explicit Branches

使用显式分支

The alembic upgrade command hinted at other options besides merging when dealing with multiple heads. Let’s back up and assume we’re back where we have as our heads just ae1027a6acf and 27c6a30d7c24:

alembic upgrade 命令暗示了在处理多个 head 时除了合并之外的其他选项。 让我们备份并假设我们回到了我们头脑中只有 ae1027a6acf 和 27c6a30d7c24 的地方：

$ alembic heads
27c6a30d7c24
ae1027a6acf

Earlier, when we did alembic upgrade head, it gave us an error which suggested please specify a specific target revision, '<branchname>@head' to narrow to a specific head, or 'heads' for all heads in order to proceed without merging. Let’s cover those cases.

早些时候，当我们做 alembic upgrade head 时，它给了我们一个错误提示 请指定特定的目标修订，'<branchname>@head'缩小到特定的head，或“heads”用于所有head 以便在不合并的情况下继续进行。 让我们涵盖这些情况。