Store a remote actor's featuredCollections URI (#38166)

app/models/account.rb

@@ -15,6 +15,7 @@
 #  avatar_remote_url             :string
 #  avatar_storage_schema_version :integer
 #  avatar_updated_at             :datetime
+#  collections_url               :string
 #  discoverable                  :boolean
 #  display_name                  :string           default(""), not null
 #  domain                        :string

app/services/activitypub/process_account_service.rb

@@ -125,6 +125,7 @@ class ActivityPub::ProcessAccountService < BaseService
 
   def set_immediate_attributes!
     @account.featured_collection_url = valid_collection_uri(@json['featured'])
+    @account.collections_url         = valid_collection_uri(@json['featuredCollections'])
     @account.display_name            = (@json['name'] || '')[0...(Account::DISPLAY_NAME_LENGTH_HARD_LIMIT)]
     @account.note                    = (@json['summary'] || '')[0...(Account::NOTE_LENGTH_HARD_LIMIT)]
     @account.locked                  = @json['manuallyApprovesFollowers'] || false

db/migrate/20260311152331_add_collections_url_to_accounts.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddCollectionsURLToAccounts < ActiveRecord::Migration[8.1]
+  def change
+    add_column :accounts, :collections_url, :string
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2026_03_10_095021) do
+ActiveRecord::Schema[8.1].define(version: 2026_03_11_152331) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 
@@ -162,6 +162,7 @@ ActiveRecord::Schema[8.1].define(version: 2026_03_10_095021) do
     t.string "avatar_remote_url"
     t.integer "avatar_storage_schema_version"
     t.datetime "avatar_updated_at", precision: nil
+    t.string "collections_url"
     t.datetime "created_at", precision: nil, null: false
     t.boolean "discoverable"
     t.string "display_name", default: "", null: false

spec/services/activitypub/process_account_service_spec.rb

@@ -63,6 +63,34 @@ RSpec.describe ActivityPub::ProcessAccountService do
     end
   end
 
+  context 'with collection URIs' do
+    let(:payload) do
+      {
+        'id' => 'https://foo.test',
+        'type' => 'Actor',
+        'inbox' => 'https://foo.test/inbox',
+        'featured' => 'https://foo.test/featured',
+        'followers' => 'https://foo.test/followers',
+        'following' => 'https://foo.test/following',
+        'featuredCollections' => 'https://foo.test/featured_collections',
+      }
+    end
+
+    before do
+      stub_request(:get, %r{^https://foo\.test/follow})
+        .to_return(status: 200, body: '', headers: {})
+    end
+
+    it 'parses and sets the URIs' do
+      account = subject.call('alice', 'example.com', payload)
+
+      expect(account.featured_collection_url).to eq 'https://foo.test/featured'
+      expect(account.followers_url).to eq 'https://foo.test/followers'
+      expect(account.following_url).to eq 'https://foo.test/following'
+      expect(account.collections_url).to eq 'https://foo.test/featured_collections'
+    end
+  end
+
   context 'with attribution domains' do
     let(:payload) do
       {