bug fix

src/main/java/com/loafle/overflow/model/meta/MetaSensorDisplayItem.java

@@ -17,6 +17,7 @@ public class MetaSensorDisplayItem {
     private MetaSensorItemUnit unit;
     private Date createDate;
     private MetaSensorItemType itemType;
+    private String key;
 
     @Id
     @GeneratedValue(strategy= GenerationType.IDENTITY)
@@ -77,4 +78,13 @@ public class MetaSensorDisplayItem {
     public void setItemType(MetaSensorItemType itemType) {
         this.itemType = itemType;
     }
+
+    @Column(name = "KEY", nullable = false, length = 50)
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
 }