diff --git a/app/controllers/concerns/json_api_controller.rb b/app/controllers/concerns/json_api_controller.rb
index f7bdc894..6abcad8a 100644
--- a/app/controllers/concerns/json_api_controller.rb
+++ b/app/controllers/concerns/json_api_controller.rb
@@ -391,7 +391,7 @@ def forbidden_filters
   #   allow_create
   # end
   #
-  def allow_create(controller_attributes = nil)
+  def allow_create(controller_attributes = {})
     hash = strong_attributes
            .merge(strong_relationships)
            .merge(controller_attributes)
diff --git a/app/models/image.rb b/app/models/image.rb
index 121b6565..1f97137a 100644
--- a/app/models/image.rb
+++ b/app/models/image.rb
@@ -82,6 +82,6 @@ def ratio
     sizes = original.split('.').first.gsub('@', '').split('x')
     width = sizes.first.to_i
     height = sizes.last.to_i
-    (width / height).to_f
+    width.to_f / height
   end
 end
diff --git a/app/services/image_conversion_service.rb b/app/services/image_conversion_service.rb
index 90d8219b..eb9c52a5 100644
--- a/app/services/image_conversion_service.rb
+++ b/app/services/image_conversion_service.rb
@@ -32,7 +32,7 @@ def run
     raise 'wrong class' unless @image.is_a? Image
     raise 'already in progress' if @image.converting
     raise 'missing original' if @image.original.nil?
-    raise 'missing ratio' if @image.ratio.nil?
+    raise 'missing ratio' if @image.ratio.nil? || @image.ratio.zero?
     raise 'wrong format' unless %w[png jpg jpeg].include? @image.original_ext
 
     path = @image.path
@@ -64,7 +64,6 @@ def run
     end
     to_create = wish_list - existing
     to_delete = existing - wish_list - [original]
-
     logger.info '------'
     logger.info 'found on CDN:'
     existing.each { |file| logger.info file }
@@ -190,7 +189,8 @@ def run
     logger.info '------'
 
     @image.update!(
-      conversion_error_log: "#{e.message} | #{e.class.name} | #{e.backtrace}"
+      conversion_error_log: "#{e.message} | #{e.class.name} | #{e.backtrace}",
+      converting: false
     )
 
     # TODO: notify Jan of fail
@@ -200,13 +200,13 @@ def run
 
   def lock_image
     logger.info '------'
-    logger.info 'Lock image'
+    logger.info 'lock image'
     @image.update!(converting: true)
   end
 
   def unlock_image
     logger.info '------'
-    logger.info 'Unlock image'
+    logger.info 'unlock image'
     @image.update!(converting: false)
   end
 
diff --git a/wiki/development.sh b/wiki/development.sh
index c8f46393..ec600f2b 100644
--- a/wiki/development.sh
+++ b/wiki/development.sh
@@ -71,6 +71,11 @@ bin/rails db:drop;
 bin/rails db:create
 bin/rails db:migrate
 
+# Create backup of production database
+# Sync production database down to development
+
+scripts/backup.sh
+
 # Serve Rails
 
 bin/rails s
@@ -88,7 +93,7 @@ bin/rails c
 bin/rails generate custom_scaffold products --version=v1 --scope=public
 bin/rails generate custom_scaffold product_documents --version=v1 --scope=admin
 
-# Seed database
+# Seed database (outdated)
 
 bin/rails db:seed
 bin/rails db:seed:documents
@@ -98,7 +103,7 @@ bin/rails db:seed:products
 
 bin/rails db:fixtures:load FIXTURES=articles
 
-# Drop database and start over
+# Drop database and start over (outdated)
 
 bin/rails db:environment:set RAILS_ENV=development;
 bin/rails db:drop;