slightly changed how files are stored in the bucket and allows post deletion

lib/mixer/posts/media.ex

@@ -11,6 +11,10 @@ defmodule Mixer.Posts.Media do
   postgres do
     table "media"
     repo Mixer.Repo
+
+    references do
+      reference :tweet, on_delete: :delete
+    end
   end
 
   typescript do

lib/mixer/posts/media_uploader.ex

@@ -10,7 +10,7 @@ defmodule Mixer.Posts.MediaUploader do
     if ext in @extensions, do: :ok, else: {:error, "unsupported file type #{ext}"}
   end
 
-  def storage_dir(_version, {_file, scope}), do: "uploads/media/#{scope.id}"
+  def storage_dir(_version, {_file, scope}), do: "uploads/media/#{scope.user_id}/#{scope.media_id}"
 
   def filename(_version, {file, _scope}) do
     Path.basename(file.file_name, Path.extname(file.file_name))

lib/mixer/posts/tweet_like.ex

@@ -8,6 +8,10 @@ defmodule Mixer.Posts.TweetLike do
   postgres do
     table "tweet_likes"
     repo Mixer.Repo
+
+    references do
+      reference :tweet, on_delete: :delete
+    end
   end
 
   actions do

lib/mixer_web/controllers/upload_controller.ex

@@ -11,15 +11,17 @@ defmodule MixerWeb.UploadController do
       |> put_status(:unauthorized)
       |> json(%{error: "authentication required"})
     else
-      scope = %{id: Ash.UUID.generate()}
+      media_id = Ash.UUID.generate()
+      scope = %{user_id: actor.id, media_id: media_id}
 
       case MediaUploader.store({upload, scope}) do
         {:ok, file_name} ->
-          s3_key = "uploads/media/#{scope.id}/#{file_name}"
+          s3_key = "uploads/media/#{scope.user_id}/#{scope.media_id}/#{file_name}"
           url = MediaUploader.url({file_name, scope})
 
           Mixer.Posts.Media
           |> Ash.Changeset.for_create(:upload, %{s3_key: s3_key}, actor: actor)
+          |> Ash.Changeset.force_change_attribute(:id, media_id)
           |> Ash.create()
           |> case do
             {:ok, media} ->

priv/repo/migrations/20260331210904_cascade_delete_tweet_relations.exs

@@ -0,0 +1,63 @@
+defmodule Mixer.Repo.Migrations.CascadeDeleteTweetRelations do
+  @moduledoc """
+  Updates resources based on their most recent snapshots.
+
+  This file was autogenerated with `mix ash_postgres.generate_migrations`
+  """
+
+  use Ecto.Migration
+
+  def up do
+    drop constraint(:tweet_likes, "tweet_likes_tweet_id_fkey")
+
+    alter table(:tweet_likes) do
+      modify :tweet_id,
+             references(:tweets,
+               column: :id,
+               name: "tweet_likes_tweet_id_fkey",
+               type: :uuid,
+               prefix: "public",
+               on_delete: :delete_all
+             )
+    end
+
+    drop constraint(:media, "media_tweet_id_fkey")
+
+    alter table(:media) do
+      modify :tweet_id,
+             references(:tweets,
+               column: :id,
+               name: "media_tweet_id_fkey",
+               type: :uuid,
+               prefix: "public",
+               on_delete: :delete_all
+             )
+    end
+  end
+
+  def down do
+    drop constraint(:media, "media_tweet_id_fkey")
+
+    alter table(:media) do
+      modify :tweet_id,
+             references(:tweets,
+               column: :id,
+               name: "media_tweet_id_fkey",
+               type: :uuid,
+               prefix: "public"
+             )
+    end
+
+    drop constraint(:tweet_likes, "tweet_likes_tweet_id_fkey")
+
+    alter table(:tweet_likes) do
+      modify :tweet_id,
+             references(:tweets,
+               column: :id,
+               name: "tweet_likes_tweet_id_fkey",
+               type: :uuid,
+               prefix: "public"
+             )
+    end
+  end
+end

priv/resource_snapshots/repo/media/20260331210905.json

@@ -0,0 +1,106 @@
+{
+  "attributes": [
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"gen_random_uuid()\")",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": true,
+      "references": null,
+      "scale": null,
+      "size": null,
+      "source": "id",
+      "type": "uuid"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": false,
+      "references": null,
+      "scale": null,
+      "size": null,
+      "source": "s3_key",
+      "type": "text"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": false,
+      "references": {
+        "deferrable": false,
+        "destination_attribute": "id",
+        "destination_attribute_default": null,
+        "destination_attribute_generated": null,
+        "index?": false,
+        "match_type": null,
+        "match_with": null,
+        "multitenancy": {
+          "attribute": null,
+          "global": null,
+          "strategy": null
+        },
+        "name": "media_user_id_fkey",
+        "on_delete": null,
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "users"
+      },
+      "scale": null,
+      "size": null,
+      "source": "user_id",
+      "type": "uuid"
+    },
+    {
+      "allow_nil?": true,
+      "default": "nil",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": false,
+      "references": {
+        "deferrable": false,
+        "destination_attribute": "id",
+        "destination_attribute_default": null,
+        "destination_attribute_generated": null,
+        "index?": false,
+        "match_type": null,
+        "match_with": null,
+        "multitenancy": {
+          "attribute": null,
+          "global": null,
+          "strategy": null
+        },
+        "name": "media_tweet_id_fkey",
+        "on_delete": "delete",
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "tweets"
+      },
+      "scale": null,
+      "size": null,
+      "source": "tweet_id",
+      "type": "uuid"
+    }
+  ],
+  "base_filter": null,
+  "check_constraints": [],
+  "create_table_options": null,
+  "custom_indexes": [],
+  "custom_statements": [],
+  "has_create_action": true,
+  "hash": "B9772141860212686745F81D509EBD97BACB9A5A4E7C26A0EB924D6926D1827E",
+  "identities": [],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.Mixer.Repo",
+  "schema": null,
+  "table": "media"
+}

priv/resource_snapshots/repo/tweet_likes/20260331210906.json

@@ -0,0 +1,113 @@
+{
+  "attributes": [
+    {
+      "allow_nil?": false,
+      "default": "fragment(\"gen_random_uuid()\")",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": true,
+      "references": null,
+      "scale": null,
+      "size": null,
+      "source": "id",
+      "type": "uuid"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": false,
+      "references": {
+        "deferrable": false,
+        "destination_attribute": "id",
+        "destination_attribute_default": null,
+        "destination_attribute_generated": null,
+        "index?": false,
+        "match_type": null,
+        "match_with": null,
+        "multitenancy": {
+          "attribute": null,
+          "global": null,
+          "strategy": null
+        },
+        "name": "tweet_likes_tweet_id_fkey",
+        "on_delete": "delete",
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "tweets"
+      },
+      "scale": null,
+      "size": null,
+      "source": "tweet_id",
+      "type": "uuid"
+    },
+    {
+      "allow_nil?": false,
+      "default": "nil",
+      "generated?": false,
+      "precision": null,
+      "primary_key?": false,
+      "references": {
+        "deferrable": false,
+        "destination_attribute": "id",
+        "destination_attribute_default": null,
+        "destination_attribute_generated": null,
+        "index?": false,
+        "match_type": null,
+        "match_with": null,
+        "multitenancy": {
+          "attribute": null,
+          "global": null,
+          "strategy": null
+        },
+        "name": "tweet_likes_user_id_fkey",
+        "on_delete": null,
+        "on_update": null,
+        "primary_key?": true,
+        "schema": "public",
+        "table": "users"
+      },
+      "scale": null,
+      "size": null,
+      "source": "user_id",
+      "type": "uuid"
+    }
+  ],
+  "base_filter": null,
+  "check_constraints": [],
+  "create_table_options": null,
+  "custom_indexes": [],
+  "custom_statements": [],
+  "has_create_action": true,
+  "hash": "A5479A2259477E7040C393810B5805794903152376377FA38E92C119C4947108",
+  "identities": [
+    {
+      "all_tenants?": false,
+      "base_filter": null,
+      "index_name": "tweet_likes_unique_user_tweet_index",
+      "keys": [
+        {
+          "type": "atom",
+          "value": "tweet_id"
+        },
+        {
+          "type": "atom",
+          "value": "user_id"
+        }
+      ],
+      "name": "unique_user_tweet",
+      "nils_distinct?": true,
+      "where": null
+    }
+  ],
+  "multitenancy": {
+    "attribute": null,
+    "global": null,
+    "strategy": null
+  },
+  "repo": "Elixir.Mixer.Repo",
+  "schema": null,
+  "table": "tweet_likes"
+}