Works better with Mongoid

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rabbit_carrots (0.1.17)
+    rabbit_carrots (0.1.19)
       bunny (>= 2.19.0)
       connection_pool (~> 2.3.0)
 
@@ -15,7 +15,7 @@ GEM
       tzinfo (~> 2.0)
     amq-protocol (2.3.2)
     ast (2.4.2)
-    bunny (2.20.3)
+    bunny (2.22.0)
       amq-protocol (~> 2.3, >= 2.3.1)
       sorted_set (~> 1, >= 1.0.2)
     concurrent-ruby (1.1.10)

lib/rabbit_carrots.rb

@@ -18,6 +18,8 @@ module RabbitCarrots
 
       class NackAndRequeueMessage < StandardError
       end
+
+      class PlaceholderError < Error; end
     end
   end
 end

lib/rabbit_carrots/tasks/rmq.rake

@@ -5,6 +5,10 @@ namespace :rabbit_carrots do
   task eat: :environment do
     Rails.application.eager_load!
 
+    DatabaseAgonsticNotNullViolation = defined?(ActiveRecord) ? ActiveRecord::NotNullViolation : RabbitCarrots::EventHandlers::Errors::PlaceholderError
+    DatabaseAgonsticConnectionNotEstablished = defined?(ActiveRecord) ? ActiveRecord::ConnectionNotEstablished : Mongo::Error::SocketError
+    DatabaseAgnosticRecordInvalid = defined?(ActiveRecord) ? ActiveRecord::RecordInvalid : Mongoid::Errors::Validations
+    
     channels = RabbitCarrots.configuration.routing_key_mappings.map do |mapping|
       # This will be supplied in initializer. At that time, the Handler will not be available to be loaded and will throw Uninitialized Constant
       { **mapping, handler: mapping[:handler].constantize }
@@ -47,11 +51,11 @@ def run_task(queue_name:, queue_arguments: {}, handler_class:, routing_keys:)
     rescue RabbitCarrots::EventHandlers::Errors::NackAndRequeueMessage => _e
       Rails.logger.info "Nacked and Requeued message: #{payload}"
       channel.nack(delivery_info.delivery_tag, false, true)
-    rescue ActiveRecord::NotNullViolation, ActiveRecord::RecordInvalid => e
+    rescue DatabaseAgonsticNotNullViolation, DatabaseAgnosticRecordInvalid => e
       # on null constraint violation, we want to ack the message
       Rails.logger.error "Null constraint or Invalid violation: #{payload}. Error: #{e.message}"
       channel.ack(delivery_info.delivery_tag, false)
-    rescue ActiveRecord::ConnectionNotEstablished => e
+    rescue DatabaseAgonsticConnectionNotEstablished => e
       # on connection not established, we want to requeue the message and sleep for 3 seconds
       Rails.logger.error "Error connection not established to the database: #{payload}. Error: #{e.message}"
       # delay for 3 seconds before requeuing