I would just use something likes acts_as_paranoid and then then have the
dependent destroy conditions on your associations.
On Friday, 4 May 2012 at 1:55 PM, Dmytrii Nagirniak wrote:
> Hi,
>
>
> What is the easiest way to implement soft-deletes on has_many through
> association?
>
>
> What I want is something like this:
>
> class Company > ActiveRecord::Base
> has_many :staffings
> has_many :users, through: :staffings, conditions: {staffings: {active:
> true}}
> end
>
> I want to use Company#users the following way:
>
> the Company#users should be a normal association so that it works with forms.
> when adding a new user, a new Staffing with active: true is created.
> when removing a user, the existing Staffing is updated active: false
> (currently it just get deleted).
> when adding a previously removed user (so that Staffing#active == false) the
> Staffing is updated to active: true.
>
>
> I thought about overriding the Company#users= method, but it really isn't
> good enough since there are other ways of updating the associations.
>
>
> What is the Rails Way of doing this sort of thing?
>
>
> (I asked it at SO too -
> http://stackoverflow.com/questions/10441633/soft-delete-on-has-many-through-association)
>
> What I came up with so far is:
>
> - override user= and user_ids
> - deny the use of any other association modifier methods:
>
> But all that feels really, really dirty.
>
> has_many :developments, through: :development_participations,
> conditions: {development_participations: {allowed: true}} do |a|
> %w{<< delete clear build create}.each do |association_method|
> # Disable assoc modifier methods for now
> #
> http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#method-i-has_many
> define_method(association_method) do |*args|
> raise 'nah, not yet supported. Use `developments=` instead.'
> end
> end
> end
>
>
> def users=(others)
> self.development_ids = others.collect &:id
> end
>
> def development_ids=(other_ids)
> # All the merging magic here
> end
>
>
> Any thought?
>
>
> Cheers,
> Dmytrii
> http://ApproachE.com (http://ApproachE.com/)
>
>
>
>
>
>
>
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