add supported rails versions to ci

Author: ezekg

.github/workflows/test.yml

@@ -14,8 +14,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ['3.4', '3.3', '3.2', '3.1']
         database: ['sqlite', 'postgres', 'mysql', 'mariadb']
+        ruby: ['3.4', '3.3', '3.2']
+        rails: ['7.0', '7.1', '7.2', '8.0', 'edge']
     services:
       postgres:
         image: postgres:15
@@ -45,6 +46,8 @@ jobs:
           --health-retries=5
         ports:
           - 3307:3306 # avoid conflict w/ mysql
+    env:
+      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/rails_${{replace(matrix.rails, '.', '_')}}.gemfile
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -72,5 +75,6 @@ jobs:
       - name: Test
         run: bundle exec rake test
         # sqlite is not supported yet because it doesn't support
-        # the union syntax we're using
-        continue-on-error: ${{matrix.database == 'sqlite'}}
+        # the union syntax we're using (and we don't consider
+        # failures for unreleased rails versions a blocker)
+        continue-on-error: ${{matrix.database == 'sqlite' || matrix.rails == 'edge'}}

gemfiles/rails_7_0.gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gemspec path: '../'
+gem 'rails', '~> 7.0'

gemfiles/rails_7_1.gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gemspec path: '../'
+gem 'rails', '~> 7.1'

gemfiles/rails_7_2.gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gemspec path: '../'
+gem 'rails', '~> 7.2'

gemfiles/rails_8_0.gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gemspec path: '../'
+gem 'rails', '~> 8'