working database connection in Django

.gitea/workflows/build.yaml

@@ -0,0 +1,23 @@
+name: Gitea build & run.
+run-name: ${{ gitea.actor }}
+on:
+  push:
+    branches:
+      - main
+
+pull_request:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v3
+
+        - name: Build and run tests 
+          run: docker compose up
+
+        
+
+
+  run:
+    name: run

Dockerfile

@@ -1,16 +1,13 @@
 FROM python:3.14-alpine
 
-RUN mkdir /app
-
 WORKDIR /app
 
-RUN pip install --upgrade pip
-
 COPY requirements.txt /app/
 COPY gunicorn.conf.py /app/
-COPY ./app/ /app/
+COPY ./src/ /app/
 
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --upgrade pip && \
+  pip install --no-cache-dir -r requirements.txt
 
 EXPOSE 8000
 

compose.yaml

@@ -1,9 +1,46 @@
 services:
   web:
     build: .
+    depends_on:
+      - db
     ports:
       - 8000:8000
     environment:
-      - PYTHONDONTWRITEBYTECODE=1
-      - PYTHONUNBUFFERED=1
+      PYTHONDONTWRITEBYTECODE: 1
+      PYTHONUNBUFFERED: 1
+      DJANGO_SETTINGS_MODULE: ${DJANGO_SETTINGS_MODULE}
+      POSTGRES_DB: ${DB_NAME}
+      POSTGRES_USER: ${DB_USER}
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
+      POSTGRES_HOST: ${DB_HOST}
+      POSTGRES_PORT: ${DB_PORT}
     restart: unless-stopped
+
+  db:
+    image: postgres:18
+    environment:
+      POSTGRES_DB: ${DB_NAME}
+      POSTGRES_USER: ${DB_USER}
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
+    volumes:
+      - postgres_data:/var/lib/postgresql
+    restart: unless-stopped
+
+  adminer:
+    image: adminer
+    depends_on:
+      - db
+    restart: always
+    ports:
+      - 8080:8080
+
+  test:
+    build: .
+    command: python manage.py test
+    depends_on:
+      - db
+    profiles:
+      - test
+
+volumes:
+  postgres_data:

docker-compose.dev.yml

@@ -1,5 +0,0 @@
-services:
-  web:
-    volumes:
-      - ./app:/app
-

requirements.txt

@@ -1,2 +1,3 @@
 Django==6.0.3
 gunicorn==25.1.0
+psycopg [binary] ==3.3.3

src/website/settings.py

@@ -11,6 +11,7 @@ https://docs.djangoproject.com/en/6.0/ref/settings/
 """
 
 from pathlib import Path
+import os
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
@@ -20,7 +21,7 @@ BASE_DIR = Path(__file__).resolve().parent.parent
 # See https://docs.djangoproject.com/en/6.0/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = 'django-insecure-c$q7wdq+u@ow74wp!&zzkxdylkueu)(+34e%!e0du&bjwoqz9z'
+SECRET_KEY = "django-insecure-c$q7wdq+u@ow74wp!&zzkxdylkueu)(+34e%!e0du&bjwoqz9z"
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True
@@ -31,51 +32,55 @@ ALLOWED_HOSTS = []
 # Application definition
 
 INSTALLED_APPS = [
-    'django.contrib.admin',
-    'django.contrib.auth',
-    'django.contrib.contenttypes',
-    'django.contrib.sessions',
-    'django.contrib.messages',
-    'django.contrib.staticfiles',
+    "django.contrib.admin",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "django.contrib.staticfiles",
 ]
 
 MIDDLEWARE = [
-    'django.middleware.security.SecurityMiddleware',
-    'django.contrib.sessions.middleware.SessionMiddleware',
-    'django.middleware.common.CommonMiddleware',
-    'django.middleware.csrf.CsrfViewMiddleware',
-    'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'django.contrib.messages.middleware.MessageMiddleware',
-    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    "django.middleware.security.SecurityMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.common.CommonMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
 ]
 
-ROOT_URLCONF = 'website.urls'
+ROOT_URLCONF = "website.urls"
 
 TEMPLATES = [
     {
-        'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [],
-        'APP_DIRS': True,
-        'OPTIONS': {
-            'context_processors': [
-                'django.template.context_processors.request',
-                'django.contrib.auth.context_processors.auth',
-                'django.contrib.messages.context_processors.messages',
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
             ],
         },
     },
 ]
 
-WSGI_APPLICATION = 'website.wsgi.application'
+WSGI_APPLICATION = "website.wsgi.application"
 
 
 # Database
 # https://docs.djangoproject.com/en/6.0/ref/settings/#databases
 
 DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': BASE_DIR / 'db.sqlite3',
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": os.getenv("POSTGRES_NAME"),
+        "USER": os.getenv("POSTGRES_USER"),
+        "PASSWORD": os.getenv("POSTGRES_PASSWORD"),
+        "HOST": os.getenv("POSTGRES_HOST"),
+        "PORT": os.getenv("POSTGRES_PORT"),
     }
 }
 
@@ -85,16 +90,16 @@ DATABASES = {
 
 AUTH_PASSWORD_VALIDATORS = [
     {
-        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
     },
     {
-        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+        "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
     },
     {
-        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+        "NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",
     },
     {
-        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+        "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
     },
 ]
 
@@ -102,9 +107,9 @@ AUTH_PASSWORD_VALIDATORS = [
 # Internationalization
 # https://docs.djangoproject.com/en/6.0/topics/i18n/
 
-LANGUAGE_CODE = 'en-us'
+LANGUAGE_CODE = "en-us"
 
-TIME_ZONE = 'UTC'
+TIME_ZONE = "UTC"
 
 USE_I18N = True
 
@@ -114,4 +119,4 @@ USE_TZ = True
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/6.0/howto/static-files/
 
-STATIC_URL = 'static/'
+STATIC_URL = "static/"