Merge pull request #31311 from y-yagi/ignore_no_database_error_when_loading_schema_cache

Ignore `NoDatabaseError` when loading schema cache

2 files changed, 14 insertions, 3 deletions

diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 15e9c09ffb..4d4b0dc67a 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1053,7 +1053,15 @@ module ActiveRecord
         end
       end
 
-      def current_version(connection = Base.connection)
+      def current_version(connection = nil)
+        if connection.nil?
+          begin
+            connection = Base.connection
+          rescue ActiveRecord::NoDatabaseError
+            return nil
+          end
+        end
+
         get_all_versions(connection).max || 0
       end
 
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 9ee8425e1b..4538ed6a5f 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -90,12 +90,15 @@ module ActiveRecord
             filename = File.join(app.config.paths["db"].first, "schema_cache.yml")
 
             if File.file?(filename)
+              current_version = ActiveRecord::Migrator.current_version
+              next if current_version.nil?
+
               cache = YAML.load(File.read(filename))
-              if cache.version == ActiveRecord::Migrator.current_version
+              if cache.version == current_version
                 connection.schema_cache = cache
                 connection_pool.schema_cache = cache.dup
               else
-                warn "Ignoring db/schema_cache.yml because it has expired. The current schema version is #{ActiveRecord::Migrator.current_version}, but the one in the cache is #{cache.version}."
+                warn "Ignoring db/schema_cache.yml because it has expired. The current schema version is #{current_version}, but the one in the cache is #{cache.version}."
               end
             end
           end