Ricardo do Valle
2014-Aug-09 07:22 UTC
How avoid concurrency belongs_to and has_many association?
How do I avoid concurrency and keep the data integrity if one user submit a form before the other? My issue is that the last user to submit the person/_form.rb will get all chosen cards, same the cards that first user chose and I want to prohibit that. # person.rb class Person < ActiveRecord::Base has_many :cards end # card.rb class Card < ActiveRecord::Base belongs_to :person scope :not_assigned_to_a_person, -> { Card.where(person_id: nil) } end # create_cards.rb create_table :cards do |column| column.references :person, index: true end # person/_form.rb = f.input :card_ids, collection: Card.not_assigned_to_a_person, label_method: :name, value_method: :id, input_html: { multiple: true } StackOverflow: http://stackoverflow.com/questions/25216219/how-do-i-avoid-concurrency-belongs-to-and-has-many-association -- Ricardo do Valle -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CALQXn36%3D2PZ%2BGJbQD0shL8pRXWqnoHtMKSJsXGCcHR86uK1cmw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.