Query builder methods for generic handlers

[notramo]

Sometimes it's useful for narrowing a query set in generic handlers.
Take for example a ?search=... query. The RecordList generic handler would be sufficient if there was a way to narrow down the query. Also, it would be very useful for implementing soft delete.

class ArticleListHandler < Marten::Handlers::RecordList
  model Article
  template_name "article_list.html"

  # The generic handler then adds its own filters on the result of this
  def query
    model.filter(title__contains: request.query_params["search"])
  end
end

[notramo]

Oh, I found it, it's queryset. However, it would be nice to support that macro for RecordDetail and RecordUpdate too.

[ellmetha]

I agree, all handlers that use a query set for retrieving records should have this macro. This should be an easy addition to the framework.