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1. #UNCOMMENT A LINE IN PGADMIN 4 INSTALL#
2. #UNCOMMENT A LINE IN PGADMIN 4 VERIFICATION#
3. #UNCOMMENT A LINE IN PGADMIN 4 SOFTWARE#
4. #UNCOMMENT A LINE IN PGADMIN 4 DOWNLOAD#

That was a lot, but there is one big thing missing. #to generate tablename from _tablename_(cls) -> str: Lets create this Base class in a file db > base_class.py from typing import Anyįrom import as_declarative, Base: This will be used to uniquely identify each row/record. For instance, all our table tables will have an id field. Also, we will keep all common logic related to tables in this 'Base' class. Every model will inherit this 'Base' class and we will utilize this base class to create all the database tables. Alright, now we are going to create a super grandfather class. Remember this thing, we will create an actual database session for each request later.Ī model class is the pythonic representation of a database table. Once we create an instance of the SessionLocal class, this instance will be the actual database session. just uncomment the commented lines and comment out SQLALCHEMY_DATABASE_URL = settings.DATABASE_URL As stated earlier, you can create an engine with sqllite too. We are creating a sqlalchemy engine with postgres database URL.SessionLocal = sessionmaker(autocommit=False,autoflush=False,bind=engine) # SQLALCHEMY_DATABASE_URL = "sqlite:///./sql_app.db" # uncomment below lines if you would like to use sqlite and comment above 2 lines of SQLALCHEMY_DATABASE_URL AND engine

#UNCOMMENT A LINE IN PGADMIN 4 INSTALL#

#if you don't want to install postgres or any database, use sqlite, a file system based database, SQLALCHEMY_DATABASE_URL = settings.DATABASE_URLĮngine = create_engine(SQLALCHEMY_DATABASE_URL) Ok, now we can move to database setup, type the following lines in db > session.py from sqlalchemy import create_engine

#UNCOMMENT A LINE IN PGADMIN 4 SOFTWARE#

What I have learnt in my little experience is " Software development is more about maintenance and less about development". This I am doing to make our project more maintainable. POSTGRES_DB : str = os.getenv("POSTGRES_DB","tdd")Īlmost there, just stick with me for some time. POSTGRES_PORT : str = os.getenv("POSTGRES_PORT",5432) # default postgres port is 5432 POSTGRES_SERVER : str = os.getenv("POSTGRES_SERVER","localhost") POSTGRES_PASSWORD = os.getenv("POSTGRES_PASSWORD") POSTGRES_USER : str = os.getenv("POSTGRES_USER") So, let's modify the config.py file to read from '.env file and keep our configurations ready. Now, I am going to modify our config file, this is because we don't want to directly communicate with '.env' file and instead we want to arrange all our project configurations at one specific place. In the '.env' file we are going to store critical information for our applications like api-keys, api-secret-key, database URL. To make this process of creating environment variables super easy we are going to make use of python-dotenv. Instead, I would suggest keeping this information in environment variables. Now, what we want is to have information of the database but I won't suggest storing this information in raw form. Ok let's add the following lines in requirements.txt: and run pip install -r requirements.txt fastapi Django ORM, the ORM would handle the responsibility of translating DB queries to different databases. He had used raw MySQL, and my machine did not have MySQL installed. There was one student say 'John wick', he had made a wonderful UI and the assignment was working all fine but as a backend developer, I wanted to test his backend logic and test some corner cases, I started to install his project but there was a problem.

#UNCOMMENT A LINE IN PGADMIN 4 VERIFICATION#

Most of the time, I have the responsibility of backend development in Django but sometimes I am given the responsibility of assignment verification for hiring. To understand the benefit of it, I will actually tell, what happens if we don't use ORM. We will be using an ORM called sqlalchemy, ORM is a mapper which helps translate our database table records to a class object. We can use SQLite, It is a file system based, easy-to-use database and is supported by python. In case you just want to play and learn on your local computer, You may skip downloading Postgres.

#UNCOMMENT A LINE IN PGADMIN 4 DOWNLOAD#

If you already have it, well and good, If not, download Postgres and PgAdmin(for monitoring Postgres). I would suggest you to try out Postgres as it is a production-grade db. We are going to connect a database to our app.