update

app/Http/Controllers/Api/V1/CouponController.php

@@ -48,7 +48,7 @@ class CouponController extends AuthController
     {
         $user = $this->user;
 
-        $data = UserCoupon::where('user_id', $user['id'])->where('status', 1)->where('expire_time', '>', time())->orderBy('id', 'desc')->paginate();
+        $data = UserCoupon::with('couponType')->where('user_id', $user['id'])->where('status', 1)->where('expire_time', '>', time())->orderBy('id', 'desc')->paginate();
 
         return out($data);
     }

app/Models/UserCoupon.php

@@ -48,7 +48,8 @@ class UserCoupon extends BaseModel
         return $discountAmount;
     }
 
-    public function couponType (){
+    public function couponType()
+    {
         return $this->hasMany(CouponType::class);
     }
 }