From e19fcfd67bcff0689962b9eac9b0099996860680 Mon Sep 17 00:00:00 2001
From: "Samuel E. Giddins" <segiddins@segiddins.me>
Date: Fri, 17 Apr 2015 18:12:18 -0700
Subject: [PATCH] [RLMObjectStore] Require a migration when changing the
 nullability of a column

---
 object_store.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/object_store.cpp b/object_store.cpp
index e5261694..7e4c0490 100644
--- a/object_store.cpp
+++ b/object_store.cpp
@@ -171,6 +171,14 @@ std::vector<std::string> ObjectStore::validate_schema(Group *group, ObjectSchema
                 validation_errors.push_back("Property '" + current_prop.name + "' has been made a primary key.");
             }
         }
+        if (current_prop.is_nullable != target_prop->is_nullable) {
+            if (current_prop.is_nullable) {
+                validation_errors.push_back("Property '" + current_prop.name + "' is no longer optional.");
+            }
+            else {
+                validation_errors.push_back("Property '" + current_prop.name + "' has been made optional.");
+            }
+        }
 
         // create new property with aligned column
         target_prop->table_column = current_prop.table_column;