rom-rb/chat

hey all. i got a question regarding rom in hanami, which the hanami chat couldn't help me with so far:

i have some trouble constructing a nested dataset for an index view.
i have these associated objects: subscription has plan, plan has fee. besides, subscription has client. in my index i need data from all four objects.
i'm trying to to figure out how to create a query which will give me the nested datastructure that i will need. based on the examples in the documentation i can already get either subscription with client or subscription with plan.

 def all_with_clients_and_plans
    aggregate(:clients, :plans)
  end

this is how far i got, as clients and plans are directly associated with subscription. handling the resulting ROM::Struct as an array by calling each on it is also fairly self explanatory. however, i do not understand how i can add the missing fee data that is associated to plan, or the missing client, all in the same query, or how i can have multiple queries and then construct the right array from that.

i think what i need is some sort of recursive aggregate. is that correct or am i doing something really wrong? i feel like i am coupling stuff too tighlyt, but i certainly need it in the index view. the question really is where i should put that query logic, i think.

there are samples of wrap and combine mentioned in the rom docu, but those don't seem to really do anything on this particular set. having read a bit more about the rom docs, i think i might actually be able to achieve this with custom views, as described here https://rom-rb.org/current/learn/sql/associations/

however, when adding this to my association block, there's really not any effect. checking in the source, it seems that everything in the associations block is just handed down to ROM so i must be doing something wrong here, or misunderstanding how this works.
this is how i've tried custom views

class SubscriptionRepository < Hanami::Repository
  associations do
    belongs_to :client
    has_many :plans, view: :with_fees
  end

  def all_with_clients_and_plans
    aggregate(:clients, :plans)
  end
end

class PlanRepository < Hanami::Repository
  associations do
    has_one :agreement

    belongs_to :fee
    belongs_to :subscription
  end

  def with_fees
    aggregate(:fees)
  end
end

however, all i'm getting on SubscriptionRepository.new.all_with_clients_and_plans
is
NoMethodError: undefined methodwith_fees' for #<#<Class:0x0000562a00cdaca0>:0x0000562a00bcadb0>`