WIP: Async support

.github/workflows/tests.yml

@@ -27,7 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
-        db_url: [ '', 'postgresql://pg:pgpass@localhost/bdmodels' ]
+        db-backend: ["sqlt", "pg2", "pg3"]
 
     steps:
     - name: Update Sqlite
@@ -46,11 +46,18 @@ jobs:
         # if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Tox me
       run: |
-        TOXPY="py$( echo ${{ matrix.python-version }} | sed s/\\.// )"
-        # Skip envs with the wrong Python using TOX_SKIP_ENV var.
-        # The below constructs, e.g. for py310, the string '(?!py310).*'
-        # (?!...) is negative lookahead; the expr matches anything which doed _not_
-        # start with 'py310'; and all the matched envs are excluded, so this ensures
-        # we only run the envs defined for the given Python.
-        export TOX_SKIP_ENV='(?!'"${TOXPY}).*"
-        BDMODELS_DB=${{ matrix.db_url }} tox
+        TOXDB="${{ matrix.db-backend }}"
+        # Skip envs with the wrong db-backend using TOX_SKIP_ENV var.
+        # The below constructs, e.g. for sqlt the string '.*(?<!sqlt)$'
+        # (?<!...) is negative lookbehind;
+        # the expr matches anything which does _not_ end with sqlt.
+        # All the matched envs are excluded, so this ensures
+        # we only run the envs defined for the given db-backend.
+        # The missing Python versions are skipped by the invocation flag
+        export TOX_SKIP_ENV='.*(?<!'"${TOXDB}"')$'
+        BDMODELS_DB=''
+        if (echo ${{ matrix.db-backend }} | grep pg > /dev/null); then
+            BDMODELS_DB='postgresql://pg:pgpass@localhost/bdmodels'
+        fi
+        export BDMODELS_DB
+        tox --skip-missing-interpreters true

pyproject.toml

@@ -38,9 +38,12 @@ sphinx-rtd-theme = "~3.0.2"
 dj-database-url = "^2.3.0"
 
 [tool.tox]
+# Note: Per https://github.com/tox-dev/tox/discussions/3648 the legacy ini cannot be
+# replaced by native pyproject.toml without duplicating definitions for factors
+# (i.e. explicitly listing combinations of Python and Django etc)
 legacy_tox_ini = """
 [tox]
-envlist = py39-django42, py{310,311,312}-django{42,50,51,52}, py313-django{51,52,main}
+envlist = py39-django42-{sqlt,pg2,pg3}, py{310,311,312}-django{42,50,51,52}-{sqlt,pg2,pg3}, py313-django{51,52,main}-{sqlt,pg2,pg3}
 isolated_build = True
 skipsdist = True
 
@@ -53,7 +56,8 @@ deps =
     django51: Django>=5.1,<5.2
     django52: Django>=5.2,<5.3
     djangomain: git+https://github.com/django/django.git@main#egg=django
-    psycopg2-binary
+    pg2: psycopg2-binary
+    pg3: psycopg[binary]
     dj-database-url>=2.3.0,<3.0
 
 changedir = test_bdmodels