Question

我在this tutorial之后正在研究烧瓶。运行db_migrate.py脚本时，我在open(migrations, "wt")命令上收到文件未找到错误。

db_migrate.py

#!flask/bin/python
import imp
from migrate.versioning import api
from app import db
from config import SQLALCHEMY_DATABASE_URI
from config import SQLALCHEMY_MIGRATE_REPO
from confing import basedir

print('Base directory:' + basedir)
print('db path:' + SQLALCHEMY_DATABASE_URI)
print('db repo:' + SQLALCHEMY_MIGRATE_REPO)

version = api.db_version(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO)
migration = SQLALCHEMY_MIGRATE_REPO + ('/versions/%03d_migration.py' % (version + 1))

tmp_module = imp.new_module('old_model')
old_model = api.create_model(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO)
exec(old_model, tmp_module.__dict__)
script = api.make_update_script_for_model(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO,          tmp_module.meta, db.metadata)

open(migration, "wt").write(script)

api.upgrade(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO)
version = api.db_version(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO)

print('New migration saved as ' + migration)
print('Current database version: ' + str(version))

我做了一些更改来帮助调试脚本。我甚至进入了迁移脚本的指定路径，错误仍然存在。

这是脚本的输出

Base directory: /home/username/src/python/venvs/flask
db path: sqlite:////home/username/src/python/venvs/flask/app.db
db repo: /home/username/src/python/venvs/flask/db_repository
Traceback (most recent call last):
    File"./db_migrate.py" line 22, in <module>
        open(migration, "wt").write(script)
FileNotFoundError: [Error2] No such file or directory: '/home/username/src/python/venvs/flask/db_repository/versions/001_migration.py'

即使提供绝对路径，也会发生FileNotFoundError [Error2]

0 个答案: