If you think that method would be useful there is no reason why it should be
Rails specific. Please send a feature request to the Ruby issue tracker here
https://bugs.ruby-lang.org/.
Rafael França
On May 11, 2018, 13:10 -0400, Alberto Almagro <albertoalma...@gmail.com>, wrote:
> These days I have been comparing records in my daily job lots of times, which
> made me think about a better way to retrieve and compare them. When I want to
> navigate through several relations in a collection I often see myself writing
> code like the following:
>
> Given orders as a collection of Order:
> > orders.map(&:order_option).map(&:item).map(&:title)
> => ['Foo', 'Bar', 'Baz']
>
> That is, chaining maps with Symbol to Proc coercions one after each other.
> Sharing my thoughts with my company's architect we came up with the
> alternative:
> > orders.map { |order| order&.order_option&.item&.title }
>
> But we agreed that the notation was awful and didn't improve what we had
> before. With this, I proposed what I think it is more like what we would
> expect Ruby to have. I would like to add a notation similar to the one we can
> find at Array#dig or Hash#dig in the following manner:
> > orders.map(&:order_option, &:item, &:title)
> The method doesn't necessarily need to be named map or collect, we can agree
> on a different name for it if you want. Please share your thoughts with me.
> If you like this, I would be very happy to write a PR to include it in Rails.
>
> Cheers,
> Alberto Almagro
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