added another spec for asset_ids scenario

spec/asset_spec.cr

@@ -85,5 +85,28 @@ module PlaceOS::Model
       booking.asset_ids.size.should eq(1)
       booking.asset_id.should eq(asset2.id)
     end
+
+    it "handles asset_ids enries" do
+      asset = Generator.asset.save!
+      asset2 = Generator.asset.save!
+
+      tenant = get_tenant
+      event_start = 5.minutes.from_now
+      event_end = 10.minutes.from_now
+      asset_ids = [asset.id.as(String), asset2.id.as(String)]
+      booking = Generator.booking(tenant.id, asset_ids, event_start, event_end)
+      booking.save!
+
+      booking.asset_ids.size.should eq(2)
+      booking.asset_ids.first.should eq(booking.asset_id)
+      booking.asset_id.should eq(asset.id)
+
+      asset_ids.reverse!
+      booking.asset_ids = asset_ids
+      booking.save!
+      booking.asset_ids.size.should eq(2)
+      booking.asset_ids.first.should eq(booking.asset_id)
+      booking.asset_id.should eq(asset2.id)
+    end
   end
 end

spec/generator.cr

@@ -42,6 +42,26 @@ module PlaceOS::Model
       )
     end
 
+    def self.booking(tenant_id, asset_ids : Array(String), start : Time, ending : Time, booking_type = "booking", parent_id = nil, event_id = nil)
+      user_name = Faker::Hacker.noun
+      user_email = Faker::Internet.email
+      Booking.new(
+        booking_type: booking_type,
+        asset_ids: asset_ids,
+        booking_start: start.to_unix,
+        booking_end: ending.to_unix,
+        user_email: PlaceOS::Model::Email.new(user_email),
+        user_name: user_name,
+        booked_by_email: PlaceOS::Model::Email.new(user_email),
+        booked_by_name: user_name,
+        tenant_id: tenant_id,
+        parent_id: parent_id,
+        event_id: event_id,
+        booked_by_id: "user-1234",
+        history: [] of Booking::History
+      )
+    end
+
     def self.driver(role : Driver::Role? = nil, module_name : String? = nil, repo : Repository? = nil)
       role = self.role unless role
       repo = self.repository(type: Repository::Type::Driver).save! unless repo

src/placeos-models/booking.cr

@@ -119,9 +119,14 @@ module PlaceOS::Model
     end
 
     def update_assets
-      asset_ids[0] = asset_id unless asset_ids.empty?
+      asset_ids[0] = asset_id if asset_ids.size == 1
       asset_ids.insert(0, asset_id) if asset_ids.empty?
-      asset_id = asset_ids.first
+      @asset_id = asset_ids.first
+    end
+
+    def asset_ids=(vals : Array(String))
+      @asset_ids = vals
+      @asset_ids_changed = true
     end
 
     def survey_trigger
@@ -156,6 +161,7 @@ module PlaceOS::Model
 
     def set_created
       self.last_changed = self.created = Time.utc.to_unix
+      self.asset_id = self.asset_ids.first unless self.asset_ids.empty?
     end
 
     def change_extension_data(data : JSON::Any)