【发布时间】：2013-10-19 21:05:57
【问题描述】：
我在文件listpull/models.py 中有以下模型：
from datetime import datetime
from listpull import db
class Job(db.Model):
id = db.Column(db.Integer, primary_key=True)
list_type_id = db.Column(db.Integer, db.ForeignKey('list_type.id'),
nullable=False)
list_type = db.relationship('ListType',
backref=db.backref('jobs', lazy='dynamic'))
record_count = db.Column(db.Integer, nullable=False)
status = db.Column(db.Integer, nullable=False)
sf_job_id = db.Column(db.Integer, nullable=False)
created_at = db.Column(db.DateTime, nullable=False)
compressed_csv = db.Column(db.LargeBinary)
def __init__(self, list_type, created_at=None):
self.list_type = list_type
if created_at is None:
created_at = datetime.utcnow()
self.created_at = created_at
def __repr__(self):
return '<Job {}>'.format(self.id)
class ListType(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(80), unique=True, nullable=False)
def __init__(self, name):
self.name = name
def __repr__(self):
return '<ListType {}>'.format(self.name)
我调用./run.py init 然后./run.py migrate 然后./run.py upgrade，我看到生成的迁移文件，但它是空的：
"""empty message
Revision ID: 5048d48b21de
Revises: None
Create Date: 2013-10-11 13:25:43.131937
"""
# revision identifiers, used by Alembic.
revision = '5048d48b21de'
down_revision = None
from alembic import op
import sqlalchemy as sa
def upgrade():
### commands auto generated by Alembic - please adjust! ###
pass
### end Alembic commands ###
def downgrade():
### commands auto generated by Alembic - please adjust! ###
pass
### end Alembic commands ###
run.py
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from listpull import manager
manager.run()
listpull/__init__.py
# -*- coding: utf-8 -*-
# pylint: disable-msg=C0103
""" listpull module """
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.script import Manager
from flask.ext.migrate import Migrate, MigrateCommand
from mom.client import SQLClient
from smartfocus.restclient import RESTClient
app = Flask(__name__)
app.config.from_object('config')
db = SQLAlchemy(app)
migrate = Migrate(app, db)
manager = Manager(app)
manager.add_command('db', MigrateCommand)
mom = SQLClient(app.config['MOM_HOST'],
app.config['MOM_USER'],
app.config['MOM_PASSWORD'],
app.config['MOM_DB'])
sf = RESTClient(app.config['SMARTFOCUS_URL'],
app.config['SMARTFOCUS_LOGIN'],
app.config['SMARTFOCUS_PASSWORD'],
app.config['SMARTFOCUS_KEY'])
import listpull.models
import listpull.views
更新
如果我通过./run.py shell 运行shell，然后执行from listpull import * 并调用db.create_all()，我会得到架构：
mark.richman@MBP:~/code/nhs-listpull$ sqlite3 app.db
-- Loading resources from /Users/mark.richman/.sqliterc
SQLite version 3.7.12 2012-04-03 19:43:07
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> .schema
CREATE TABLE job (
id INTEGER NOT NULL,
list_type_id INTEGER NOT NULL,
record_count INTEGER NOT NULL,
status INTEGER NOT NULL,
sf_job_id INTEGER NOT NULL,
created_at DATETIME NOT NULL,
compressed_csv BLOB,
PRIMARY KEY (id),
FOREIGN KEY(list_type_id) REFERENCES list_type (id)
);
CREATE TABLE list_type (
id INTEGER NOT NULL,
name VARCHAR(80) NOT NULL,
PRIMARY KEY (id),
UNIQUE (name)
);
sqlite>
很遗憾，迁移仍然无法正常工作。
【问题讨论】：
标签： python flask flask-sqlalchemy flask-migrate