Non-standard source for a relationship about jsonapi HOT 6 CLOSED

In case anyone's curious, a potential solution in the schema file:
field :tags, {:array, :map}, virtual: true

  def inject_tags_from_tag_ids(product) do
    tag_ids = product.tag_ids || []
    tags = for id <- tag_ids, do: %{id: id}
    %{product | tags: tags}
  end

Then adding tags: TagView to relationships in the View seems to work OK, as long as you pass your product through the function at some point.

NOTE: edited to remove incorrect :include from View code example.

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Just spitballing on things that would've seemed easier to me.

here's one idea:

def relationships do
  [
    # other entries...
    tags: {:tag_ids, &tags_from_ids/1}
  ]
end

defp tags_from_ids(tag_ids) do
  for id <- tag_ids, do: %{id: id, type: "tags"}
end

The idea being that :tag_ids is the name of the field that is the source of the data, and &tags_from_ids/1 is the function to transform said data.

The particulars above could be modified to allow specifying TagView somewhere as well, etc. If that's easier.

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You could also lock it down more with

def relationships do
    [
    # other entries...
    tags: [ids: :tag_ids, type: "tags"]
  ]
end

That's less flexible, intended only for an input that is known to be a list of IDs (as is true for us). I'm not sure what else you might be getting in for a relationship, anyway.

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FYI, this is no longer a priority for our specific project.

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Ha! I was just contemplating this issue. Many thanks for the heads up. I'll close this issue then.

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