Silence Standard warnings by filtering rubocop-rails-only params

lib/standard/rails/load_rubocop_rails_without_the_monkey_patch.rb

@@ -7,7 +7,7 @@
 # of RuboCop built-in cops in this file, we need to monitor it for changes
 # in rubocop-rails and keep it up to date.
 #
-# Last updated from rubocop-rails v2.31.0
+# Last updated from rubocop-rails v2.32.0
 
 # frozen_string_literal: true
 

lib/standard/rails/plugin.rb

@@ -27,9 +27,7 @@ def rules(context)
         LintRoller::Rules.new(
           type: :object,
           config_format: :rubocop,
-          value: without_extended_rule_configs(
-            rules_with_config_applied
-          )
+          value: sanitize_rules(rules_with_config_applied)
         )
       end
 
@@ -54,10 +52,31 @@ def rules_with_config_applied
       # See: https://github.com/standardrb/standard-rails/issues/25#issuecomment-1881127173
       def without_extended_rule_configs(rules)
         rules.reject { |(name, _)|
-          ["Style/InvertibleUnlessCondition", "Lint/SafeNavigationChain"].include?(name)
+          [
+            "Style/InvertibleUnlessCondition",
+            "Lint/SafeNavigationChain",
+            "Lint/UselessAccessModifier"
+          ].include?(name)
         }.to_h
       end
 
+      # Normalize AllCops to avoid validator warnings without changing behavior:
+      # - MigratedSchemaVersion: rubocop-rails ships a UNIX-epoch default that
+      #   skips nothing; removing it is equivalent unless a real timestamp is provided.
+      # - TargetRailsVersion: Standard may pre-seed a nil to placate merging; deleting
+      #   only the nil value avoids a warning and lets RuboCop infer Rails version.
+      # See: https://github.com/standardrb/standard-rails/issues/72
+      def sanitize_rules(rules)
+        cleaned = without_extended_rule_configs(rules)
+        if cleaned["AllCops"].is_a?(Hash)
+          all_cops = cleaned["AllCops"].dup
+          all_cops.delete("MigratedSchemaVersion")
+          all_cops.delete("TargetRailsVersion") if all_cops.key?("TargetRailsVersion") && all_cops["TargetRailsVersion"].nil?
+          cleaned["AllCops"] = all_cops
+        end
+        cleaned
+      end
+
       # This is not fantastic.
       #
       # When you `require "rubocop-rails"`, it will not only load the cops,

test/standard/rails/plugin_test.rb

@@ -12,5 +12,32 @@ def test_configuring_target_rails_version
 
       assert_equal 5.2, result.value["AllCops"]["TargetRailsVersion"]
     end
+
+    def test_filters_migrated_schema_version_from_all_cops
+      subject = Plugin.new({})
+
+      result = subject.rules(LintRoller::Context.new)
+
+      refute_includes result.value.fetch("AllCops", {}).keys, "MigratedSchemaVersion"
+    end
+
+    def test_removes_useless_access_modifier_block
+      subject = Plugin.new({})
+
+      result = subject.rules(LintRoller::Context.new)
+
+      assert_nil result.value["Lint/UselessAccessModifier"]
+    end
+
+    def test_no_parameter_warnings_when_validating_config
+      subject = Plugin.new({})
+      rules = subject.rules(LintRoller::Context.new)
+
+      _, err = capture_io do
+        RuboCop::Config.create(rules.value, "inline.yml", check: true)
+      end
+
+      assert_equal "", err
+    end
   end
 end