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我有我想要映射到一列卡桑德拉卡桑德拉CodecNotFoundException:編解碼器找不到請求的操作
public enum MyEnum {
Aa,
Bb,
Cc,
}
一個枚舉領域,這是我如何註冊它
CodecRegistry myCodecRegistry = new CodecRegistry();
myCodecRegistry.register(new EnumOrdinalCodec<MyEnum>(MyEnum.class));
cluster = Cluster.builder().addContactPoint(cassandraHosts).withPort(cassandraPort).withCodecRegistry(myCodecRegistry).build();
我是能夠連接到cassandra就好了。下面是模型類
public class MyModel
{
@PartitionKey
@Column(name="id")
private String id;
@ClusteringColumn
@Column(name="name")
private String name = "";
@Column(name="enum")
private MyEnum enum;
public MyModel(String i, String n)
{
id=i;
name=n
enum=MyEnum.Aa;
}
}
的片段,這裏是我如何創建使用CQL
CREATE TABLE IF NOT EXISTS
tab
(
name varchar ,
id varchar,
enum varchar,
PRIMARY KEY ((id), name));
最後,我有我的映射代碼
manager = new MappingManager(session);
mapper = manager.mapper(MyModel.class);
accessor = manager.createAccessor(MyAccessor.class);
這裏是表MyAccessor
@Accessor
public interface MyAccessor{
@Query("SELECT * FROM case WHERE id=? and name=? ALLOW FILTERING;")
MyModel readByIdAndName(String id,String name);
}
所以當我嘗試執行
MyModel m = new MyModel("asdasf","qw");
mapper.save(m);
我得到
com.datastax.driver.core.exceptions.CodecNotFoundException: Codec not found for requested operation: [varchar <-> my.pack.MyEnum]
at com.datastax.driver.core.exceptions.CodecNotFoundException.copy(CodecNotFoundException.java:56)
at com.datastax.driver.core.exceptions.CodecNotFoundException.copy(CodecNotFoundException.java:25)
at com.datastax.driver.mapping.DriverThrowables.propagateCause(DriverThrowables.java:41)
at com.datastax.driver.mapping.Mapper.save(Mapper.java:289)
我到底做錯了什麼?
謝謝!不能相信我錯過了:) – AbtPst