Flask-SQLAlchemy没有创建我的表

Question

SQLAlchemy，由于某些原因，当我运行create_db.py只会创建迁移表。 我从python终端尝试过， from modules import db,models然后运行db.create_all()但是它仍然给出相同的结果。

这是我的models.py 。

from __init__ import db
from datetime import datetime

class Batch(db.Model):
    __tablename__='batch'
    batch_id = db.Column(db.String, primary_key=True)
    #total = db.Column(db.Integer)
    success = db.Column(db.Integer)
    failure = db.Column(db.Integer)
    folder = db.Column(db.String(15))
    email = db.Column(db.String(20))
    detail = db.relationship('Conversion', backref='details',lazy='dynamic')
    platform = db.relationship('Platform', backref='pub_data', lazy = 'dynamic')

    def __init__(self,batch_id,success,failure,folder,email):
        self.batch_id = batch_id
        self.success = success
        self.failure = failure
        self.folder = folder
        self.email = email

class Conversion(db.Model):
    __tablename__ = 'conversion'
    id = db.Column(db.Integer, primary_key=True)
    batch_id = db.Column(db.String,db.ForeignKey('batch.batch_id'))
    file_names = db.Column(db.String)
    status = db.Column(db.String(6))
    error = db.Column(db.Text)
    res_prop = db.Column(db.Integer)        

    def __init__(self,batch_id,file_names,status,res_prop,error=None):
        self.batch_id = batch_id
        self.file_names = file_names
        self.status = status
        self.error = error
        self.res_prop = res_prop

class Platform(db.Model):
    __tablename__ = 'platform'
    id= db.Column(db.Integer,primary_key=True)
    batch_id = db.Column(db.String, db.ForeignKey('batch.batch_id'))
    title = db.Column(db.String)
    pub_date = db.Column(db.DateTime)

    def __init__(self,batch_id,title):
        self.batch_id = batch_id
        self.title = title
        self.pub_date = datetime()

这是我的create_db.py

from modules import models
from modules import db
from migrate.versioning import api
from modules.default_config import SQLALCHEMY_DATABASE_URI , SQLALCHEMY_MIGRATE_REPO
import os.path

db.create_all()
db.session.commit()
if not os.path.exists(SQLALCHEMY_MIGRATE_REPO):
    api.create(SQLALCHEMY_MIGRATE_REPO, 'database repository')
    api.version_control(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO)
else:
    api.version_control(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO, api.version(SQLALCHEMY_MIGRATE_REPO))

Answer 1

在改变

from __init__ import db

至

from modules import db

在models.py中它起作用了。 从外部程序包运行flask应用程序时，需要从程序包本身而不是单个模块中导入所有内容。