How do I validate one post per day?

Question

I am trying to create a validation to ensure one post per day, 24hrs starting from 00:00. How can this be done in Rails please?

I did the following but I am not sure whe

Answer 1

That error is because today is instance method of model, not a scope.

What you need is scope:

 scope :today, lambda{ where(:created_at => (Time.now.beginning_of_day..Time.now)) }

Answer 2

You shoud use scopes for that:

class Article
  scope :today, -> { where(:created_at => (Time.now.beginning_of_day..Time.now.end_of_day)) }
end

http://apidock.com/rails/ActiveRecord/NamedScope/ClassMethods/scope