Django dirty draft

New Project  (inside project folder)

virtualenv -p python3.7 backend

cd backend

source bin/activate

pip install django

Django-admin startproject core

cd core

#Migrate the models 

Python manage.py makemigrations 

Python manage.py migrate 

Python manage.py createsuperuser

python manage.py runserver

Create App

python manage.py startapp

 Fix migrations problems 

python manage.py showmigrations

python manage.py migrate --fake core zero

find . -path "*/migrations/*.py" -not -name "__init__.py" -delete find . -path "*/migrations/*.pyc" -delete

python manage.py makemigrations

python manage.py migrate --fake-initial

• setUp and tearDown: These are functions to be executed before (setUp) and after (tearDown) in each unit test. These are very useful for fixtures.
• setUpClass and tearDownClass: In an analogous way of setUp and tearDown, these functions are executed before (setUpClass) and after (tearDownClass) during the whole test case. This means that it is executed only once for a test case. Since they’re used by Django to make important configurations, if you overwrite these methods in your test case class, don’t forget to call the super implementation inside the functions.
• setUpTestData: this function can be used to have a class-level atomic block to define data for the whole test case. That means that this function automatically rollbacks the changes in the database after the finalization of all the unit tests in the test case. This is mainly used to load data to your test database.
• Assert methods: Django has the set of assert methods from unittest, and has another one created for the framework. These methods, such as assertEqual, assertIsNone, assertTrue, etc, can be used in the unit test to check the different conditions that have to be met. For example, in the unit test of login, you can assert that the response has a status code of 200 because you want to make sure that if the data is sent correctly, then your application has to return the response with that code.

You can dump your database into a fixture and then load that from your test database:

python manage.py dumpdata --format=json main.TestData > test_data.json

assertRaises(exception, callable, *args, **kwds)

The test passes if exception is raised

Create postgres database on Ubuntu 

sudo -u postgres psql

postgres=# create database mydb;
postgres=# create user myuser with encrypted password 'mypass';
postgres=# grant all privileges on database mydb to myuser;

Modify password

sudo -u user_name psql db_name

To reset the password if you have forgotten:

ALTER USER user_name WITH PASSWORD 'new_password';