flask-by-example | flask heroku environment variables sqlalchemy | Data Migration library
kandi X-RAY | flask-by-example Summary
kandi X-RAY | flask-by-example Summary
flask, heroku, environment variables, sqlalchemy, flask-migrate, redis
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Count words in a given URL .
- Run migrations .
- Run migrations .
- get count of words
- Return the results of a job .
- Upgrade the database .
- Initialize parameters .
- Downgrade the results .
- Show the index . html .
- Representation of the object .
flask-by-example Key Features
flask-by-example Examples and Code Snippets
Lines of Code : 22
License : No License
Copy$ mkdir flask-by-example && cd flask-by-example
$ git init
$ pyvenv-3.5 env
$ source env/bin/activate
$ touch app.py .gitignore README.md requirements.txt
├── .gitignore
├── app.py
├── README.md
└── requirements.txt
$ pip install Fl $ psql
# create database wordcount_dev;
CREATE DATABASE
# \q
$ cd flask-by-example
$ pip install psycopg2==2.6.1 Flask-SQLAlchemy===2.1 Flask-Migrate==1.8.0
$ pip freeze > requirements.txt
Community Discussions
Trending Discussions on flask-by-example
QUESTION
The Flask tutorial (and many other tutorials out there) suggests that the engine, the db_session and the Base (an instance of declarative_metadata) are all created at import-time.
This creates some problems, one being, that the URI of the DB is hardcoded in the code and evaluated only once.
One solution is to wrap these calls in functions that accept the app as a parameter, which is what I've done. Mind you - each call caches the result in app.config:
ANSWER
Answered 2022-Jan-23 at 07:50I have eventually decided to refactor the app so that it uses Flask-SQLAlchemy.
In short, the app now does something like this:
QUESTION
I'm trying to learn Flask and use postgresql with it. I'm following this tutorial https://realpython.com/flask-by-example-part-2-postgres-sqlalchemy-and-alembic/, but I keep getting error.
...ANSWER
Answered 2021-Jun-15 at 02:32I made a new file database.py and defined db there.
database.py
QUESTION
I'm new to SQLAlchemy and PostgreSql, so apologies for the newbie question. I'm trying to connect to a table in a remote PostgreSql server using flask-alchemy, and read all the table records. It doesn't have to be flask-sqlalchemy specifically, but I do need to read the table records.
The table has 3 records, but it always comes back as zero records when I step through the code.
I'm using python 3.7, visual studio code with an virtual environment in windows 10.
I checked several articles already:
https://flask-sqlalchemy.palletsprojects.com/en/2.x/#
https://stackabuse.com/using-sqlalchemy-with-flask-and-postgresql/
https://realpython.com/flask-by-example-part-2-postgres-sqlalchemy-and-alembic/
https://www.askpython.com/python-modules/flask/flask-postgresql
Here's my app.py code:
...ANSWER
Answered 2021-Apr-07 at 02:27I believe you're missing a
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install flask-by-example
You can use flask-by-example like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
