Add database drivers as optional dependencies

examples/config.py

@@ -7,6 +7,9 @@ from pathlib import Path
 
 
 SQLALCHEMY_DATABASE_URI = "postgresql+psycopg:///schilder2000"
+# SQLALCHEMY_DATABASE_URI = "sqlite:///schilder2000.db"  # Relative to instance directory
+# SQLALCHEMY_DATABASE_URI = "mysql:///schilder2000"
+
 # To generate a secret key:
 #   % python -c 'import secrets; print(secrets.token_hex())'
 SECRET_KEY = "abc123"  # Replace me!

pdm.lock

@@ -2,10 +2,10 @@
 # It is not intended for manual editing.
 
 [metadata]
-groups = ["default", "auth-ldap", "auth-oauth", "auth-saml", "dev"]
+groups = ["default", "auth-ldap", "auth-oauth", "auth-saml", "db-mysql", "db-postgres", "dev"]
 strategy = ["inherit_metadata"]
 lock_version = "4.5.0"
-content_hash = "sha256:724b4e719780cf213f4d1e15ff86e2f807d6c595b2e54595523c6fbd3615e247"
+content_hash = "sha256:1af461aea0170421afe47c809cb315739413db60f16b0d60a7d38d91ddf457ca"
 
 [[metadata.targets]]
 requires_python = ">=3.12"
@@ -950,6 +950,17 @@ files = [
     {file = "multidict-6.1.0.tar.gz", hash = "sha256:22ae2ebf9b0c69d206c003e2f6a914ea33f0a932d4aa16f236afc049d9958f4a"},
 ]
 
+[[package]]
+name = "mysqlclient"
+version = "2.2.4"
+requires_python = ">=3.8"
+summary = "Python interface to MySQL"
+groups = ["db-mysql"]
+files = [
+    {file = "mysqlclient-2.2.4-cp312-cp312-win_amd64.whl", hash = "sha256:e1ebe3f41d152d7cb7c265349fdb7f1eca86ccb0ca24a90036cde48e00ceb2ab"},
+    {file = "mysqlclient-2.2.4.tar.gz", hash = "sha256:33bc9fb3464e7d7c10b1eaf7336c5ff8f2a3d3b88bab432116ad2490beb3bf41"},
+]
+
 [[package]]
 name = "packaging"
 version = "24.1"
@@ -1059,7 +1070,7 @@ name = "psycopg"
 version = "3.2.1"
 requires_python = ">=3.8"
 summary = "PostgreSQL database adapter for Python"
-groups = ["default"]
+groups = ["db-postgres"]
 dependencies = [
     "backports-zoneinfo>=0.2.0; python_version < \"3.9\"",
     "typing-extensions>=4.4",
@@ -1560,7 +1571,7 @@ name = "typing-extensions"
 version = "4.12.2"
 requires_python = ">=3.8"
 summary = "Backported and Experimental Type Hints for Python 3.8+"
-groups = ["default"]
+groups = ["default", "db-postgres"]
 files = [
     {file = "typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d"},
     {file = "typing_extensions-4.12.2.tar.gz", hash = "sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8"},
@@ -1571,7 +1582,7 @@ name = "tzdata"
 version = "2024.1"
 requires_python = ">=2"
 summary = "Provider of IANA time zone data"
-groups = ["default"]
+groups = ["db-postgres"]
 marker = "sys_platform == \"win32\""
 files = [
     {file = "tzdata-2024.1-py2.py3-none-any.whl", hash = "sha256:9068bc196136463f5245e51efda838afa15aaeca9903f49050dfa2679db4d252"},

pyproject.toml

@@ -16,7 +16,6 @@ dependencies = [
     "flask-sqlalchemy~=3.1",
     "flask-wtf~=1.2",
     "uuid7~=0.1",
-    "psycopg~=3.2",
     "flask-weasyprint~=1.1",
     "python-webpack-boilerplate~=1.0",
     "pyipp @ git+https://github.com/ctalkington/python-ipp",
@@ -33,6 +32,12 @@ auth-saml = [
 auth-oauth = [
     "Authlib~=1.3",
 ]
+db-postgres = [
+    "psycopg~=3.2",
+]
+db-mysql = [
+    "mysqlclient~=2.2",
+]
 
 [tool.pdm.dev-dependencies]
 dev = [