根据您所看到的,我猜,attributes
未在表定义中定义的错误消息。你介意用这个编辑你的文章吗?
但是,当我建立我的CQL表像这样(注意itemid
复合分区键和version
):
CREATE TABLE products.itemmaster (
itemid text,
version int,
productid uuid,
supplierskumap map<uuid, text>,
PRIMARY KEY ((itemid,version), productid)
);
...插入该行:
INSERT INTO products.itemmaster (itemid,version,productid,supplierskumap)
VALUES ('item1',1,26893749-dcfc-42c7-892c-bee8c9cff630,
{1351f82f-5dc5-4328-82f4-962429c92a2b:'86CCG123'});
...和我建立我的POJO是这样的:
@Table(keyspace = "products", name = "itemmaster")
public class Product {
@PartitionKey(0)
private String itemid;
@PartitionKey(1)
private int version;
@ClusteringColumn
private UUID productid;
@Column(name="supplierskumap")
private Map<UUID,String> suppliersku;
public UUID getProductid() {
return productid;
}
public void setProductid(UUID _productid) {
this.productid = _productid;
}
public int getVersion() {
return this.version;
}
public void setVersion(int _version)
{
this.version = _version;
}
public String getItemid() {
return itemid;
}
public void setItemid(String _itemid) {
this.itemid = _itemid;
}
public Map<UUID, String> getSuppliersku() {
return suppliersku;
}
public void setSuppliersku(Map<UUID, String> _suppliersku) {
this.suppliersku = _suppliersku;
}
}
...用这个构造函数和我的数据访问对象(DAO)上方法:
public ProductsDAO()
{
session = connect(CASSANDRA_NODES, USERNAME, PASSWORD);
prodMapper = new MappingManager(session).mapper(Product.class);
}
public Product getProd(String itemid, int version, UUID productid) {
return prodMapper.get(itemid,version,sku);
}
...那么这个main
类成功查询我的表格和地图我Map
:
private static void main(String[] args) {
ProductsDAO dao = new ProductsDAO();
Product prod = dao.getProd("item1", 1, UUID.fromString("26893749-dcfc-42c7-892c-bee8c9cff630"));
System.out.println(
prod.getProductid() + " - " +
prod.getItemid() + " - " +
prod.getSuppliersku().get(UUID.fromString("1351f82f-5dc5-4328-82f4-962429c92a2b")));
dao.closeCassandra();
}
...并产生这样的输出:
26893749-dcfc-42c7-892c-bee8c9cff630 - item1 - 86CCG123
注意:编辑上述示例以支持复合分区键。
你可以分享你的'创建表'cql吗?这可能只是抱怨没有“属性”列。驱动程序将为每个查询创建预先准备好的语句,这些语句将作为您声明的模型的结果进行生成,而且看起来服务器正在拒绝这个语句。 –
是的,你是正确的问题解决。 –