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-rw-r--r--activerecord/lib/active_record/validations/uniqueness.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb
index 2e2bcec922..154aacef9f 100644
--- a/activerecord/lib/active_record/validations/uniqueness.rb
+++ b/activerecord/lib/active_record/validations/uniqueness.rb
@@ -60,7 +60,7 @@ module ActiveRecord
# will use SQL LOWER function before comparison, unless it detects a case insensitive collation
relation = klass.connection.case_insensitive_comparison(table, attribute, column, value)
else
- value = klass.connection.case_sensitive_modifier(value)
+ value = klass.connection.case_sensitive_modifier(value) if value
relation = table[attribute].eq(value)
end