From ffaf00c0642c007cca69be946bb3a76df3b52e19 Mon Sep 17 00:00:00 2001
From: rob bygrave <robin.bygrave@gmail.com>
Date: Wed, 27 May 2020 21:39:16 +1200
Subject: [PATCH] Improve error message throw on DTO unmapped DB column

---
 src/main/java/io/ebeaninternal/server/dto/DtoMeta.java | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/main/java/io/ebeaninternal/server/dto/DtoMeta.java b/src/main/java/io/ebeaninternal/server/dto/DtoMeta.java
index c29e739c2..a6c99cb43 100644
--- a/src/main/java/io/ebeaninternal/server/dto/DtoMeta.java
+++ b/src/main/java/io/ebeaninternal/server/dto/DtoMeta.java
@@ -88,7 +88,7 @@ class DtoMeta {
         if (request.isRelaxedMode()) {
           property = DtoReadSetColumnSkip.INSTANCE;
         } else {
-          throw new IllegalStateException("Unable to map DB column " + cols[i] + " to a property with a setter method on " + dtoType);
+          throw new IllegalStateException(unableToMapColumnMessage(cols[i]));
         }
       }
       setterProps[pos++] = property;
@@ -97,6 +97,10 @@ class DtoMeta {
     return new DtoQueryPlanConPlus(request, maxArgConstructor, setterProps);
   }
 
+  private String unableToMapColumnMessage(DtoColumn col) {
+    return "Unable to map DB column " + col + " to a property with a setter method on " + dtoType+". Consider query.setRelaxedMode() to skip mapping this column.";
+  }
+
   private DtoQueryPlan matchSetters(DtoMappingRequest request) {
 
     DtoColumn[] cols = request.getColumnMeta();
@@ -110,7 +114,7 @@ class DtoMeta {
         if (request.isRelaxedMode()) {
           property = DtoReadSetColumnSkip.INSTANCE;
         } else {
-          throw new IllegalStateException("Unable to map DB column " + cols[i] + " to a property with a setter method on " + dtoType);
+          throw new IllegalStateException(unableToMapColumnMessage(cols[i]));
         }
       }
       setterProps[i] = property;