Rails 3, has_one / has_many with lambda condition

by

*Hmm I’m not sure I understood your question but this may help you:

# code
class Topic < ActiveRecord::Base
  scope :for_user, lambda { |user| includes(:bookmarks).where(bookmarks: { user_id: user.try(:id) || user} ) }

# call
Topic.for_user(current_user) # => Array of Topics

As you can see the parameter of the scope for_user can be a User object OR a user id.

Hope this helps!

Similar questions:

More Related Contents:

  1. Rails 3: Get Random Record
  2. do..end vs curly braces for blocks in Ruby
  3. How to get a random number in Ruby
  4. ActiveRecord: size vs count
  5. Connecting Rails 3.1 with Multiple Databases
  6. In Ruby on Rails, to extend the String class, where should the code be put in?
  7. How do I replace accented Latin characters in Ruby?
  8. How to chain scope queries with OR instead of AND?
  9. When to use a “has_many :through” relation in Rails?
  10. incompatible character encodings: ASCII-8BIT and UTF-8
  11. Alias for column names in Rails
  12. Altering the primary key in Rails to be a string
  13. ActiveRecord Find By Year, Day or Month on a Date field
  14. Rails 3 devise, current_user is not accessible in a Model ?
  15. STI, one controller
  16. LEFT OUTER joins in Rails 3
  17. How to test for (ActiveRecord) object equality
  18. How to match accented characters with a regex?
  19. Paginating an Array in Ruby with will_paginate
  20. Regular expressions with validations in RoR 4
  21. What are the brackets [5.1] after ActiveRecord Migration and how does it work? [duplicate]
  22. f.error_messages in Rails 3.0
  23. Convert HTML to word file ?
  24. Ruby: problem installing EventMachine under Windows 7
  25. Rails 3.1 limit user created objects
  26. Ruby on Rails Callback, what is difference between :before_save and :before_create?
  27. Rails 3 – Speed up Console Loading Time
  28. Rails devise: user_signed_in? not working
  29. Customizing Devise error messages in Rails 3?
  30. Rails Object Relationships and JSON Rendering

Leave a Comment