Oof. Precedence strikes again ;) I guess that's what I get for debugging
after a long week.
Thanks for catching that.
Adam
On Friday, November 19, 2021 at 6:02:07 PM UTC-5 Jeremy Evans wrote:
> On Fri, Nov 19, 2021 at 2:00 PM adam.me...@gmail.com <adam.me...@gmail.com>
> wrote:
>
>> Hi Jeremy,
>>
>> I'm working on something that has me a bit puzzled. I'd like to introduce
>> an association that depends on a provided value, or fall back to a default.
>>
>> My plan is to overwrite the getter to accept an optional argument, and
>> then to pass it along. But using `super` won't work. I have a method that
>> does, but it's the first time I've had to alias a method inside a Sequel
>> model and I wonder if there's a better way.
>>
>> Here's the code and annotated spot.
>>
>> DB.create_table(:subscriptions) do
>> primary_key :id
>> end
>>
>> DB.create_table(:discounts) do
>> primary_key :id
>> column :valid_until, Date
>> foreign_key :subscription_id, :subscriptions
>> end
>>
>> class Subscription < Sequel::Model
>> one_to_many :discounts
>>
>> one_to_one :active_discount, class: :Discount do |ds|
>> ds.where { valid_until >= Sequel.delay { |ds| ds.opts[:invoice_date] ||
>> Sequel::CURRENT_TIMESTAMP }}
>> end
>>
>> # Is there a better way than using an alias here? super won't work inside
>> the method
>> alias_method :original_active_discount, :active_discount
>>
>> def active_discount(invoice_date = nil)
>> if invoice_date
>> original_active_discount { |ds| ds.clone(invoice_date: invoice_date) }
>> else
>> original_active_discount
>> end
>> end
>>
>
> You can use the alias approach, but you don't need to, because association
> methods are added to a module included in the class, not in the class
> itself. You can use super, but you need the right syntax:
>
> def active_discount(invoice_date = nil)
> if invoice_date
> super() { |ds| ds.clone(invoice_date: invoice_date) }
> else
> super()
> end
> end
>
> Thanks,
> Jeremy
>
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