New AshGraphql Feature: Subscriptions

bastiW · June 9, 2025, 6:08pm

Minimal Reproduction example

Including

AshGraphql
AshSqlite

In the meanwhile you can skip most steps shown in the Video. As the CLI is doing that for you. You just need to run some cli commands and then modify the resource

If you want to start from scratch you can run:

Setup new project (I think the commands provide on the ash-hq site would also work)

mix igniter.new my_subscription_app_sqlite --with phx.new --install ash,ash_sqlite,ash_graphql,absinthe_phoenix

Create a resource

mix ash.gen.resource MySubscriptionApp.Posts.Post --uuid-v7-primary-key id --attribute title:string:required:public --attribute text:string:required:public --extend graphql,sqlite

Modify the post resource:

github.com/bastiW/my_subscription_app_sqlite

lib/my_subscription_app/posts/post.ex

main

defmodule MySubscriptionApp.Posts.Post do
  use Ash.Resource,
    otp_app: :my_subscription_app_sqlite,
    domain: MySubscriptionApp.Posts,
    data_layer: AshSqlite.DataLayer,
    extensions: [AshGraphql.Resource]

  sqlite do
    table "posts"
    repo MySubscriptionAppSqlite.Repo
  end

  graphql do
    type :post

    mutations do
      create :create_post, :create
      update :update_post, :update
    end

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Switch from simple GraphQL interface to playground - as the simple seem to not support the subscriptions: