Recover when the database hasn’t been set up yet

Manually throw a MigrationPending exception if needed, or in cases where
app code begins executing before migration has run (eg worker instances
that override default Docker entrypoints) and there is no DB schema yet
(eg review apps) we get an error saying that the whole schema needs to
be put into the blocklist

lib/dfe/analytics.rb

@@ -79,7 +79,8 @@ def self.configure
     end
 
     def self.initialize!
-      ActiveRecord::Base.connection # cause an exception early if we can't connect
+      raise ActiveRecord::PendingMigrationError if ActiveRecord::Base.connection.migration_context.needs_migration?
+
       DfE::Analytics::Fields.check!
 
       entities_for_analytics.each do |entity|

spec/spec_helper.rb

@@ -35,6 +35,11 @@ def name; end
   # Disable RSpec exposing methods globally on `Module` and `main`
   config.disable_monkey_patching!
 
+  config.around do |example|
+    ActiveRecord::Base.connection.migration_context.migrate
+    example.run
+  end
+
   config.define_derived_metadata do |metadata|
     metadata[:skip_analytics_init] = true unless metadata[:skip_analytics_init] == false
   end