adapay

src/main/java/com/izouma/nineth/domain/Collection.java

@@ -140,7 +140,7 @@ public class Collection extends BaseEntity {
 
     private Integer currentNumber;
 
-    @Formula(value = "if(stock = 0, 1, 0)")
+    @Formula(value = "if(stock <= 0, 1, 0)")
     private int soldOut;
 
     private int projectId;