Add postgres to CI build matrix

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: erikvw

.github/workflows/build.yml

@@ -8,14 +8,16 @@ jobs:
   build:
     name: >-
       build (Python ${{ matrix.python-version }},
-      Django ${{ matrix.django-version }})
+      Django ${{ matrix.django-version }},
+      ${{ matrix.database }})
     runs-on: ubuntu-latest
 
     strategy:
       fail-fast: false
       matrix:
         python-version: ['3.12', '3.13', '3.14']
         django-version: ['5.2', '6.0', 'dev']
+        database: ['mysql', 'postgres']
 
     services:
       mysql:
@@ -32,6 +34,20 @@ jobs:
           --health-timeout=5s
           --health-retries=3
 
+      postgres:
+        image: postgres:latest
+        env:
+          POSTGRES_DB: test_db
+          # pragma: allowlist secret
+          POSTGRES_PASSWORD: postgres
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
     steps:
       - name: Install pycups and words dependency
         run: |
@@ -59,5 +75,7 @@ jobs:
           fi
 
       - name: Run tests
+        env:
+          SELECTED_DATABASE: ${{ matrix.database }}
         run: |
           uv run --dev --no-sources runtests.py

pyproject.toml

@@ -12,6 +12,7 @@ dependencies = [
 [dependency-groups]
 dev = [
     "clinicedc-tests>=1.2.2",
+    "psycopg>=3.2",
     "ruff>=0.15.15",
     "sphinx>=9.1.0",
 ]

src/edc_cdisc/tests/test_settings.py

@@ -1,3 +1,4 @@
+import os
 import sys
 from datetime import datetime
 from importlib.resources import files
@@ -123,5 +124,25 @@
     add_lab_dashboard_middleware=True,
 ).settings
 
+if os.environ.get("SELECTED_DATABASE") == "postgres":
+    project_settings["DATABASES"] = {
+        "default": {
+            "ENGINE": "django.db.backends.postgresql",
+            "NAME": "test_db",
+            "USER": "postgres",
+            "PASSWORD": "postgres",
+            "HOST": "127.0.0.1",
+            "PORT": 5432,
+        },
+        "client": {
+            "ENGINE": "django.db.backends.postgresql",
+            "NAME": "test_db2",
+            "USER": "postgres",
+            "PASSWORD": "postgres",
+            "HOST": "127.0.0.1",
+            "PORT": 5432,
+        },
+    }
+
 for k, v in project_settings.items():
     setattr(sys.modules[__name__], k, v)