How to handle ActiveRecord::RecordInvalid

Rails
1

I’m new to Rails. I’m using Service layer to keep my controllers thin.
All
my service layer files are located in app/services/domain,
app/services/application and app/services/infrastructure. I’m using
services in active admin controller section. When validation fail it
can’t
redirect correctly, it keeps throwing me ActiveRecord::RecordInvalid.
Here
is the error page:

http://i.stack.imgur.com/YDiNN.png

And here is the category service:

def self.create(params)
ActiveRecord::Base.transaction do
begin
category = Category.new(params)
decrease_counters(category.id)
increase_counters(category.id)
category.save!
end
end
end

In finally here is the my controller:

controller do

def create
  category = Service::CategoryService.create(params[:category])
  if category
    flash[:notice] = "Category was successfully created."
    redirect_to params[:button] == "create_and_new" ?

new_admin_category_url : admin_categories_url
else
render active_admin_template(‘new.html.erb’)
end
end
end # end controller

How to solve it? Please help me.

2

This all seems very unnecessary. Have you tried pushing the business
logic
into the Category model instead?

Best thing with Rails is to follow convention (that is kind of the point
of
Rails). You can go through www.railstutorial.org and get a much better
sense for how to structure your controllers and models.