Question

我一直在休眠状态下查询更新实体的状态。这种称为PaymentRequestLink的实体与另一个称为Extraparameters的实体具有一对多关系

PaymentRequestType.java：

<html>
<head>
    <script type="text/javascript" src="pic.js"></script>
    <link rel="stylesheet" href="pic.css">
</head>
<body class="desz">
    <div class="desz">
    <div class="deghsz cent">
        <button class="Bleft" onclick="RanImg()">Random all</button>
        <button class="Bcent" onclick="Toggle1()">Toggle</button>
        <button class="Bright" onclick="RanImg1()">Random</button>
    </div>
    <div class="deghsz cent">
        <button class="Bleft" onclick="Toggle2()">Toggle</button>
        <button class="Bright" onclick="RanImg2()">Random</button>
    </div></div>
    <div class="desz">
    <div id="L1" class="dehsz left cent">
        <img id="rando" class="pic" src="images/space.jpg" />
    </div>
    <div id="R1" class="dehsz right cent">
        <img id="rando2" class="pic" src="images/space2.jpg" />
    </div></div>
</body>
</html>

ExtraParameter.java：

@Entity
@Table(name="payment_link")
public class PaymentRequestLink {

     private Map<String, ExtraParameter<E>> extraParameters;

     @Fetch(FetchMode.SELECT)
     @ElementCollection(fetch=FetchType.EAGER)
     @CollectionTable(name="extraparameter_payment_link", 
       schema=BaseEntity.DATABASE_SCHEMA, joinColumns=@JoinColumn(name="extraparameter_payment_link_id"))
     @MapKeyColumn(name = "name", length=64, nullable = false)
     public Map<String, ExtraParameter<String>> getExtraParameters() {
           return extraParameters;
      }

这是extraparameter_payment_link表的数据示例：

 @Embeddable
 public class ExtraParameter<T extends Serializable> implements Serializable {

     //...

     @Column(name="extra_type", length=64, nullable=false)
     @NotNull
     public String getType() {
         return type;
     }

     @Column(name="extra_value", length=255, nullable=false)
     @NotNull
     public T getValue() {
         return value;
     }

我要进行的查询是，当存储在Extraparameters中的到期日期是当前日期之前的日期时，将PaymentRequestLink的状态更新为EXPIRED。这是我现在拥有的查询：

extraparameter_payment_link_id  extra_type           extra_value          name
    1                           java.sql.Date        2019-01-01           EXPIRATION_DATE

我遇到的例外是：

    String stateSentence = "AND state <> '";
    String sqlUpdateLinkDetailed =  "UPDATE PaymentRequestLink ld SET state='EXPIRED' " +
            "WHERE extraParameters.EXPIRATION_DATE.value <= ? " +
            stateSentence + PaymentRequestLinkState.PAID;

    Calendar calendar = Calendar.getInstance();
    calendar.add(Calendar.MINUTE, 1);
    Timestamp now = new Timestamp(calendar.getTimeInMillis());

    hibernateTemplate.bulkUpdate(sqlUpdateLinkDetailed, now);

有人可以帮我吗？

Answer 1

索引集合的元素（数组，列表和映射）可以是索引仅在where子句中引用：

map

有关详细信息，请参见HQL expressions documentation。

带有地图属性的实体的休眠查询

1 个答案: