'FlaskDB' object has no attribute 'sequences' - flask

Question

I tried peewee with flask for two days, but I failed till now. The code is as the follows:
import click
from flask import Flask
from flask.cli import FlaskGroup
from playhouse.flask_utils import FlaskDB
from models import *
from config import config
flask_db = FlaskDB()
def create_app(config_name):
application = Flask(__name__)
application.config.from_object(config[config_name])
flask_db.init_app(application)
flask_db.connect_db()
flask_db.database.create_tables([User])
flask_db.database.close()
#application.route('/')
def index():
return "hello world!"
return application
def create_cli_app(info):
return create_app("develop")
#click.group(cls=FlaskGroup, create_app=create_cli_app)
def cli():
pass
#cli.command()
def initdb():
flask_db.connect_db()
flask_db.database.create_tables([User])
flask_db.database.close()
if __name__ == "__main__":
cli()
When I run it with the CLI: python manage.py run, I got the following errors:
(venv) ➜ /Users/yw/Documents/web git:(master) ✗ p manage.py run
Traceback (most recent call last): File "manage.py", line 46, in
cli() File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/core.py",
line 716, in call
return self.main(*args, **kwargs) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/flask/cli.py",
line 345, in main
return AppGroup.main(self, *args, **kwargs) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/core.py",
line 696, in main
rv = self.invoke(ctx) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/core.py",
line 1060, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/core.py",
line 889, in invoke
return ctx.invoke(self.callback, **ctx.params) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/core.py",
line 534, in invoke
return callback(*args, **kwargs) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/decorators.py",
line 64, in new_func
return ctx.invoke(f, obj, *args[1:], **kwargs) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/click/core.py",
line 534, in invoke
return callback(*args, **kwargs) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/flask/cli.py",
line 388, in run_command
app = DispatchingApp(info.load_app, use_eager_loading=eager_loading) File
"/Users/yw/Documents/web/venv/lib/python3.4/site-packages/flask/cli.py",
line 124, in init
self._load_unlocked() File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/flask/cli.py",
line 148, in _load_unlocked
self._app = rv = self.loader() File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/flask/cli.py",
line 201, in load_app
rv = self.create_app(self) File "manage.py", line 30, in create_cli_app
return create_app("develop") File "manage.py", line 19, in create_app
flask_db.database.create_tables([User]) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/peewee.py",
line 3765, in create_tables
create_model_tables(models, fail_silently=safe) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/peewee.py",
line 5175, in create_model_tables
m.create_table(**create_table_kwargs) File "/Users/yw/Documents/web/venv/lib/python3.4/site-packages/peewee.py",
line 4845, in create_table
if db.sequences and pk is not False and pk.sequence: AttributeError: 'FlaskDB' object has no attribute 'sequences'
Indeed, I just want to initiate the DB by using flask.cli tool. As you see, if I use the command “python manage.py initdb”, I can only get the same error output as above.
So what is the meaning of "'FlaskDB' object has no attribute ‘sequences'"? What should I do?
Thanks for your help!

Answer 1

It seems that your User model doesn't have correct database.
With FlaskDB, your User model should inherit FlaskDB().Model
instead of defining class Meta: database = database.
database = FlaskDB()
class User(database.Model):
pass