MAGETWO-63403: Auto Generated coupon codes not applying

Author: Sergii Kovalenko

app/code/Magento/SalesRule/Model/ResourceModel/Rule/Collection.php

@@ -156,11 +156,19 @@ public function setValidationFilter(
                     \Magento\SalesRule\Model\Rule::COUPON_TYPE_NO_COUPON
                 );
 
-                $orWhereConditions = [
+                $autoGeneratedCouponCondition = [
                     $connection->quoteInto(
-                        '(main_table.coupon_type = ? AND rule_coupons.type = 1)',
+                        "main_table.coupon_type = ?",
                         \Magento\SalesRule\Model\Rule::COUPON_TYPE_AUTO
                     ),
+                    $connection->quoteInto(
+                        "rule_coupons.type = ?",
+                        \Magento\SalesRule\Api\Data\CouponInterface::TYPE_GENERATED
+                    ),
+                ];
+
+                $orWhereConditions = [
+                    "(" . implode($autoGeneratedCouponCondition, " AND ") . ")",
                     $connection->quoteInto(
                         '(main_table.coupon_type = ? AND main_table.use_auto_generation = 1 AND rule_coupons.type = 1)',
                         \Magento\SalesRule\Model\Rule::COUPON_TYPE_SPECIFIC