New AshGraphql Feature: Subscriptions

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1

You can now add subscriptions using the DSL.

subscriptions do
  pubsub YourAppWeb.Endpoint

  subscribe :something_changed do
    action_types [:create, :update, :destroy]
  end
end

Right now, you still need to add the dependency from github. A release will follow soon.
I created a small demo video showing the setup.

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2

Amazing work! I will try it out asap!

Off-topic: I noticed that around 6:10 of the video, you saved a Ash resource and the formatter changed the resource code blocks order. How did you do that?

3

Also, another question.

Can you somehow add logic to filter out data based on some criteria?

For example, let’s say I have a resource that contains data for multiple organizations, I want to subscribe to that resource actions, but I don’t want it to allow an me to subscribe to all data from all organizations for that resource, only for the ones that are from my own organization.

4

What you subscribe to is a query built for a read action, so that read action can contain filters. Additionally, if you have policies that filter the data, they will be applied to all data before a notification is sent.

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5

That is the Spark.Formatter plugin. You can configure it to set a section order for any Spark DSL including Ash.Resource.

https://hexdocs.pm/spark/Spark.Formatter.html

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