Define a serializer for /api/v1/mutes/details

app/controllers/api/v1/mutes_controller.rb

@@ -13,8 +13,8 @@ class Api::V1::MutesController < Api::BaseController
   end
 
   def details
-    @data = @mutes = paginated_mutes
-    render json: @mutes
+    @data = @mutes = load_mutes
+    render json: @mutes, each_serializer: REST::MuteSerializer
   end 
 
   private
@@ -27,6 +27,10 @@ class Api::V1::MutesController < Api::BaseController
     Account.includes(:muted_by).references(:muted_by)
   end
 
+  def load_mutes
+    paginated_mutes.includes(:account, :target_account).to_a
+  end
+
   def paginated_mutes
     Mute.where(account: current_account).paginate_by_max_id(
       limit_param(DEFAULT_ACCOUNTS_LIMIT),

app/serializers/rest/mute_serializer.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class REST::MuteSerializer < ActiveModel::Serializer
+  include RoutingHelper
+  
+  attributes :id, :account, :target_account, :created_at, :hide_notifications
+
+  def account
+    REST::AccountSerializer.new(object.account)
+  end
+
+  def target_account
+    REST::AccountSerializer.new(object.target_account)
+  end
+end