问题描述
我创建了Java Chaincode,并将其部署在Fabric 2.2网络上。一切似乎都正常,但是当我从分类帐中进行任何查询时,我都得到了空白的JSON响应。我在日志中没有发现任何问题,因此似乎一切正常,但是响应为空。
@Transaction()
public Car queryCarById(final Context ctx,final String id) {
ChaincodeStub stub = ctx.getStub();
String CarState = stub.getStringState(id);
if (CarState.isEmpty()) {
String errorMessage = String.format("Car %s does not exist",id);
System.out.println(errorMessage);
throw new ChaincodeException(errorMessage,CarTransferErrors.Car_NOT_FOUND.toString());
}
Car Car = genson.deserialize(CarState,Car.class);
System.out.println(Car);
return Car;
}
package Cartransfer;
import com.owlike.genson.annotation.JsonProperty;
import org.hyperledger.fabric.contract.annotation.DataType;
import org.hyperledger.fabric.contract.annotation.Property;
@DataType()
public final class Car {
@property()
private final String id;
@property()
private final String name;
@property()
private final String area;
@property()
private final String ownerName;
@property()
private final String value;
public String getid() {
return id;
}
public String getname() {
return name;
}
public String getarea() {
return area;
}
public String getownerName() {
return ownerName;
}
public String getvalue() {
return value;
}
public Car(@JsonProperty("id") final String id,@JsonProperty("name") final String name,@JsonProperty("area") final String area,@JsonProperty("ownerName") final String ownerName,@JsonProperty("value") final String value) {
this.id = id;
this.name = name;
this.area = area;
this.ownerName = ownerName;this.value= value;}}
解决方法
您是否可以进行测试交易到网络(在成功部署链代码之后)?以下脚本可能有助于单独验证
并使用此方法查询链式代码(以验证账本上的txn