Migrate database from MySQL to PostgreSQL

backend/.env.docker

@@ -4,5 +4,5 @@ DJANGO_DEBUG=True
 DJANGO_ALLOWED_HOSTS=localhost,127.0.0.1,0.0.0.0,backend
 CORS_ALLOWED_ORIGINS=http://localhost:3000,http://localhost:5173
 
-# MariaDB connection (matches the db service in docker-compose.yml)
-DATABASE_URL=mysql://cheatsheet_user:cheatsheet_pass@db:3306/cheatsheet_db
+# PostgreSQL connection (matches the db service in docker-compose.yml)
+DATABASE_URL=postgres://cheatsheet_user:cheatsheet_pass@db:5432/cheatsheet_db

backend/Dockerfile

@@ -11,10 +11,10 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     wget \
     tar \
     fontconfig \
-    default-libmysqlclient-dev \
+    libpq-dev \
     pkg-config \
     gcc \
-    default-mysql-client \
+    postgresql-client \
     && rm -rf /var/lib/apt/lists/*
 
 # Download and extract the appropriate Tectonic binary
@@ -35,4 +35,4 @@ COPY . .
 
 EXPOSE 8000
 
-CMD ["sh", "-c", "until mysqladmin ping -hdb -ucheatsheet_user -pcheatsheet_pass --ssl=0 --silent; do sleep 2; done && python manage.py migrate && python manage.py runserver 0.0.0.0:8000"]
+CMD ["sh", "-c", "until pg_isready -h db -U cheatsheet_user; do sleep 2; done && python manage.py migrate && python manage.py runserver 0.0.0.0:8000"]

backend/requirements.txt

@@ -3,7 +3,7 @@ djangorestframework>=3.15
 django-cors-headers>=4.4
 python-dotenv>=1.0,<2.0
 dj-database-url>=2.1
-mysqlclient>=2.2
+psycopg2-binary>=2.9
 
 # Testing
 pytest>=8.0

docker-compose.yml

@@ -1,24 +1,23 @@
 services:
   db:
-    image: mysql:8.0
+    image: postgres:15
     restart: unless-stopped
     environment:
-      MYSQL_ROOT_PASSWORD: rootpass
-      MYSQL_DATABASE: cheatsheet_db
-      MYSQL_USER: cheatsheet_user
-      MYSQL_PASSWORD: cheatsheet_pass
+      POSTGRES_DB: cheatsheet_db
+      POSTGRES_USER: cheatsheet_user
+      POSTGRES_PASSWORD: cheatsheet_pass
     # ports: comment out for now we'e not using atm
-    #   - "3306:3306"
+    #   - "5432:5432"
     volumes:
-      - mysql_data:/var/lib/mysql
+      - postgres_data:/var/lib/postgresql/data
   backend:
     build: ./backend
     ports:
       - "8000:8000"
     env_file:
       - ./backend/.env.docker
     environment:
-      - DATABASE_URL=mysql://cheatsheet_user:cheatsheet_pass@db:3306/cheatsheet_db
+      - DATABASE_URL=postgres://cheatsheet_user:cheatsheet_pass@db:5432/cheatsheet_db
     volumes:
       - ./backend:/app
     depends_on:
@@ -41,4 +40,4 @@ services:
       backend:
         condition: service_healthy
 volumes:
-  mysql_data:
+  postgres_data: