On Thursday, 1 August 2013 10:56:06 UTC-4, Ruby-Forum.com User wrote: > > The models: > > class User > has_many :institution_memberships > belongs_to :account > > after_create :set_default_membership > > def set_default_membership > if institution_memberships.empty? > institution_memberships.create(default_data_from_account) > end > end > end > > class InstitutionMembership > validates_uniqueness_of :user_id, :scope => :institution_id > end > > Controller: > > def create > @account = Account.new > @account.transaction do > @user = User.new(params[:user]) > @institution = Institution.new(:name => @account.name) > @user.account = @account > @institution.account = @account > @institution_membership = InstitutionMembership.new( > :institution => @institution, > :user => @user > ) > > if @user.save && @institution.save && > @institution_membership.save > > end > end > end > > To put this into context. A user can belong to one or many institutions. > The relationship is managed through :institution_memberships. A user can > only have one membership per institution, hence the > validates_uniqueness_of :user_id, :scope => :institution_id > > There is a lot more code happening around all of this than i've shown, > but the main problem is that basically two memberships are being created > for a user with the same institution. The validate is not working. The > after_create callback is creating an object successfully, and the > standard save in the controller is working. > > My guess is it has something to do with the timing of things and when > they're actually written to the database, but i don't know that process > well enough to pinpoint the exact cause. Obviously there is no need to > create a membership object in the controller, but the code had been that > way for a long time without a problem. Nobody noticed it until suddenly > the bad data started showing up. I'm more curious as to why the > validation goes through. > > What's the community think? > > Can you post a log of the SQL that gets executed during the transaction? I'm curious about what the validates_uniqueness_of is looking up, if anything.
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