售罄排序

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

@@ -12,6 +12,7 @@ import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
+import org.hibernate.annotations.Formula;
 
 import javax.persistence.*;
 import java.math.BigDecimal;
@@ -127,4 +128,7 @@ public class Collection extends BaseEntity {
     private BigDecimal originalPrice;
 
     private Integer currentNumber;
+
+    @Formula(value = "if(stock = 0, 1, 0)")
+    private int soldOut;
 }