2017-07-26 69 views
1

我試圖修補一個對象,它與另一個多態對象有OneToOne關係。擁有關係的對象看起來是這樣的(我省略了不相關的JPA批註和域):JsonMappingException當修補到Spring Data REST庫時

public class Policy extends BaseEntity { 
    @Valid 
    @NotNull 
    @OneToOne(optional = false, cascade = {CascadeType.PERSIST, CascadeType.MERGE}, orphanRemoval = true) 
    @JoinColumn(name = "CHANNELFLOW_ID") 
    private ChannelFlowConfig channelFlow; 
} 

引用的對象是這樣的:

@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "type") 
@Entity 
@Inheritance(strategy = InheritanceType.SINGLE_TABLE) 
@Table(name = "CHANNELFLOWCONFIG") 
public abstract class ChannelFlowConfig extends BaseEntity { 
     @JsonProperty("type") 
     public String getType() { 
      return getClass().getName(); 
     } 
} 

子對象有沒有什麼特別的,只是一些不同的字段(同樣,字段在上面省略),它們沒有Repository,而是全部通過PolicyRepository處理。通過CocoaRest和修補時

Caused by: com.fasterxml.jackson.databind.JsonMappingException: 
Unexpected token (END_OBJECT), expected FIELD_NAME: missing property 'type' that is to contain type id (for class com.vw.mbbc.authserver.model.policy.ChannelFlowConfig) 
at [Source: N/A; line: -1, column: -1] (through reference chain: com.vw.mbbc.authserver.model.policy.Policy["channelFlow"]) 
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:270) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.DeserializationContext.wrongTokenException(DeserializationContext.java:1376) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.DeserializationContext.reportWrongTokenException(DeserializationContext.java:1197) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedUsingDefaultImpl(AsPropertyTypeDeserializer.java:165) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:105) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserializeWithType(AbstractDeserializer.java:209) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:502) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:104) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:240) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java:1628) ~[jackson-databind-2.8.9.jar:2.8.9] 
at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1301) ~[jackson-databind-2.8.9.jar:2.8.9] 
at org.springframework.data.rest.webmvc.json.DomainObjectReader.doMerge(DomainObjectReader.java:222) ~[spring-data-rest-webmvc-2.5.5.RELEASE.jar:?] 
at org.springframework.data.rest.webmvc.json.DomainObjectReader.read(DomainObjectReader.java:77) ~[spring-data-rest-webmvc-2.5.5.RELEASE.jar:?] 

出現此錯誤: 現在,當我試圖修補策略與具有從/政策/ 2 GET獲取完全相同的內容身體,我得到這個例外通過改造進行修補時。有趣的是客戶端(Retrofit)能夠正確地反序列化JSON(傑克遜版本在客戶端和服務器端是相同的)。 內容發送看起來像這樣:

{ 
    "id": 2, 
    /* some fields */ 
    "channelFlow": { 
     "id": 1, 
     /* some fields */ 
     "type": "com.somepackage.VehicleChannelFlowConfig" 
    } 
} 

任何想法,我做錯了嗎? 謝謝!

編輯:即使當我在服務器手動註冊ObjectMapper,它能夠反序列化JSON。我出出主意吧:-(

編輯#2: 問題是Spring的DomainObjectReader,代碼

if (!mappedProperties.hasPersistentPropertyForField(fieldName)) { 
    i.remove(); 
} 

刪除正確傳輸類型的註釋這似乎與Spring本身有問題,傑克遜工作正常

回答

0

試試這個:

@JsonProperty(access = READ_ONLY) 
public String getType() { 
    return getClass().getName(); 
} 

在我看來orphanRemoval = true是多餘的,因爲你只設置PERSISTMERGE級聯類型...

+0

READ_ONLY可悲的是不會改變任何東西:-( – N4zroth