How to use relationship id in a `get_by` read action

My resource has this relationship:

    belongs_to :customer, Customer do
      allow_nil? true
      attribute_writable? true
    end

    belongs_to :customer, Customer do
      allow_nil? true
      attribute_writable? true
    end

This means that this resource table will contain a :customer_id field. Now I want to create a read action that will filter it by the :customer_id. I can do that by passing that as an argument and doing the filter manually, but I expected that I could use the get_by shortcut here, like this:

    read :get_by_customer_id do
      get_by :customer_id
    end

    read :get_by_customer_id do
      get_by :customer_id
    end

The problem is that this fails with Ash saying that there is not attribute, calculation or aggregate with that name.

2 Replies

ZachDaniel•2y ago

That may be a bug in that validator Can you open an issue on ash? In the meantime, make it get? true and add the argument/filter yourself should do it

BlibsOP•2y ago

https://github.com/ash-project/ash/issues/637 done

GitHub

bug: read action get_by don't recognize relationship attributes · I...

Describe the bug If you have a relationship in your resource, for example with belongs_to, get_by shortcut for a read action will not find the correspondent relationship id attribute. To Reproduce ...

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Programming

How to use relationship id in a `get_by` read action

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