update summon model and blueprint for series lookup

app/blueprints/api/v1/summon_blueprint.rb

@@ -16,6 +16,19 @@ module Api
         s.promotion_names
       end
 
+      field :series do |s|
+        if s.summon_series.present?
+          {
+            id: s.summon_series_id,
+            slug: s.summon_series.slug,
+            name: {
+              en: s.summon_series.name_en,
+              ja: s.summon_series.name_jp
+            }
+          }
+        end
+      end
+
       field :uncap do |s|
         {
           flb: s.flb,

app/models/summon.rb

@@ -3,6 +3,8 @@
 class Summon < ApplicationRecord
   include PgSearch::Model
 
+  belongs_to :summon_series, optional: true
+
   multisearchable against: %i[name_en name_jp],
                   additional_attributes: lambda { |summon|
                     {
@@ -65,4 +67,18 @@ class Summon < ApplicationRecord
   def promotion_names
     promotions.filter_map { |p| GranblueEnums::PROMOTIONS.key(p)&.to_s }
   end
+
+  def series_slug
+    summon_series&.slug
+  end
+
+  # Virtual attribute to set summon_series by ID or slug
+  # Supports both UUID and slug lookup for flexibility
+  def series=(value)
+    return self.summon_series = nil if value.blank?
+
+    # Try to find by ID first, then by slug
+    found = SummonSeries.find_by(id: value) || SummonSeries.find_by(slug: value)
+    self.summon_series = found
+  end
 end