Flask SQLAlchemy db.create_all() not creating database
15,082
The setting should be SQLALCHEMY_DATABASE_URI
, not URL
. You can see that the db doesn't have the right uri when you ran this line:
>>> db
<SQLAlchemy engine='sqlite://'>
It shows that Flask-SQLAlchemy defaulted to an in-memory sqlite database. Change the setting and it will work.
Author by
David
Updated on July 25, 2022Comments
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David almost 2 years
I can't seem to figure out why my call to db.create_all() is not working.
I have an app package with following init:
from flask import Flask from config import config from flask.ext.sqlalchemy import SQLAlchemy # create the database object db = SQLAlchemy() # this function is the application factory def create_app(environment): app = Flask(__name__) app.config.from_object(config[environment]) db.init_app(app) from bp_root import bp_root from bp_aws import bp_aws app.register_blueprint(bp_root, url_prefix='/') app.register_blueprint(bp_aws, url_prefix='/aws') return app
Then I have models.py inside the app package:
from datetime import datetime from . import db class MyTestClass(db.Model): __tablename__ = 'mytesttable' id = db.Column(db.Integer, primary_key=True) email = db.Column(db.String(64), nullable=False, unique=True, index=True) username = db.Column(db.String(64), nullable=False, unique=True, index=True) is_admin = db.Column(db.Boolean) password_hash = db.Column(db.String(128)) location = db.Column(db.String(64)) member_since = db.Column(db.DateTime, default=datetime.utcnow) bio = db.Column(db.Text()) def __init__(self, email, username): self.email = email self.username = username def __repr__(self): return '<User %r>' % self.username
app.config contains, among other things, the following:
'SQLALCHEMY_DATABASE_URL': 'sqlite:////Users/xxxxx/projects/yyyyy/data-dev.sqlite'
Then if I fire up my interactive shell, you can see objects exist appropriately and call to db.create_all() appears to work, but results in no database creation:
$ ./manage.py shell >>> from app import db >>> from app import models >>> app <Flask 'app'> >>> db <SQLAlchemy engine='sqlite://'> >>> models <module 'app.models' from '/Users/xxxxx/projects/yyyyy/app/models.py'> >>> dir(models) ['MyTestClass', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'datetime', 'db'] >>> db.create_all() >>>
Any thoughts on why the database isn't getting created?
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Ndrslmpk about 2 yearswhat is the interactive shell? How do i interact with my flask application ?
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