Handle schema_dump_path being unavailable in Rails 6

Author: andyw8

lib/ruby_lsp/ruby_lsp_rails/server.rb

@@ -42,7 +42,9 @@ def resolve_database_info_from_model(model_name)
         }
 
         if ActiveRecord::Tasks::DatabaseTasks.respond_to?(:schema_dump_path)
-          info[:schema_file] = ActiveRecord::Tasks::DatabaseTasks.schema_dump_path(const.connection.pool.db_config)
+          info[:result][:schema_file] =
+            ActiveRecord::Tasks::DatabaseTasks.schema_dump_path(const.connection.pool.db_config)
+
         end
         info
       rescue => e

test/ruby_lsp_rails/runner_client_test.rb

@@ -31,6 +31,15 @@ class RunnerClientTest < ActiveSupport::TestCase
         assert_match(%r{db/schema\.rb$}, response.fetch(:schema_file))
       end
 
+      test "handles older Rails version which don't have `schema_dump_path`" do
+        ActiveRecord::Tasks::DatabaseTasks.send(:alias_method, :old_schema_dump_path, :schema_dump_path)
+        ActiveRecord::Tasks::DatabaseTasks.undef_method(:schema_dump_path)
+        response = T.must(@client.model("User"))
+        assert_nil(response[:schema_file])
+      ensure
+        ActiveRecord::Tasks::DatabaseTasks.send(:alias_method, :schema_dump_path, :old_schema_dump_path)
+      end
+
       test "returns nil if model doesn't exist" do
         assert_nil @client.model("Foo")
       end