Rails – passing parameters in link_to

by

First of all, link_to is a html tag helper, its second argument is the url, followed by html_options. What you would like is to pass account_id as a url parameter to the path.
If you have set up named routes correctly in routes.rb, you can use path helpers.

link_to "+ Service", new_my_service_path(:account_id => acct.id)

I think the best practice is to pass model values as a param nested within <model_name>:

link_to "+ Service", new_my_service_path(:my_service => { :account_id => acct.id })

# my_services_controller.rb
def new
  @my_service = MyService.new(params[:my_service])
end

And you need to control that account_id is allowed for ‘mass assignment’. In rails 3 you can use powerful controls to filter valid params within the controller where it belongs. I highly recommend.

http://apidock.com/rails/ActiveModel/MassAssignmentSecurity/ClassMethods

Also note that if account_id is not freely set by the user (e.g., a user can only submit a service for the own single account_id, then it is better practice not to send it via the request, but set it within the controller by adding something like:

@my_service.account_id = current_user.account_id

You can surely combine the two if you only allow users to create service on their own account, but allow admin to create anyone’s by using roles in attr_accessible.

More Related Contents:

  1. How to change default timezone for Active Record in Rails?
  2. Why can you not have a foreign key in a polymorphic association?
  3. Passing parameters in rails redirect_to
  4. Rails 5: ActiveRecord OR query
  5. How can I download a file from a URL and save it in Rails?
  6. Ruby on Rails. How do I use the Active Record .build method in a :belongs to relationship?
  7. rake db:schema:load vs. migrations
  8. Add Custom Field/Column to Devise with Rails 4
  9. instance variable vs. symbol in ruby on rails (form_for)
  10. Set start date and expiration date for Rails cookies
  11. Difference between string and text in rails?
  12. find vs find_by vs where
  13. What is the replacement for ActionController::Base.relative_url_root?
  14. rails built in datetime validation
  15. Cannot add a NOT NULL column with default value NULL in Sqlite3
  16. Bulk Insert records into Active Record table
  17. Cannot install JSON gem in rails using windows
  18. ERROR: Failed to build gem native extension on Mavericks
  19. Purpose of “consider_all_requests_local” in config/environments/development.rb?
  20. What to use instead of `render :text` (and `render nothing: true`) in rails 5.1 and later?
  21. Rails 4.0 Strong Parameters nested attributes with a key that points to a hash
  22. ERROR: Error installing rmagick: in Windows with Ruby 2.2
  23. Omniauth: callback not firing, returns failure with “invalid credentials”
  24. API Versioning for Rails Routes
  25. Index on multiple columns in Ruby on Rails
  26. Best way to use html5 data attributes with rails content_tag helper?
  27. Ruby on Rails Bootstrap Glyphicons not working
  28. How to get rid of OpenSSL::SSL::SSLError
  29. Rails 3.1 include_root_in_json
  30. Is the server running on host “localhost” (::1) and accepting TCP/IP connections on port 5432?

Leave a Comment