you can add vendors while creating.

src/cljc/auto_ap/entities/invoice.cljc

@@ -3,14 +3,15 @@
             [auto-ap.entities.shared :as shared]))
 
 (s/def ::vendor-id int?)
+(s/def ::vendor-name string?)
 (s/def ::company-id int?)
 (s/def ::invoice-number ::shared/required-identifier)
 (s/def ::date ::shared/date)
 (s/def ::total ::shared/money)
 
-(s/def ::invoice (s/keys :req-un [::vendor-id
-                                  ::company-id
+(s/def ::invoice (s/keys :req-un [::company-id
                                   ::invoice-number
                                   ::date
-                                  ::total
-                                  ]))
+                                  ::total]
+                         :opt-un [::vendor-id
+                                  ::vendor-name]))