我得到例外:
org.postgresql.util.PSQLException:错误:运算符不存在:uuid = bytea
提示:没有运算符匹配给定的名称和参数类型。您可能需要添加显式类型转换。
我有JPA实体
@Entity(name = "products")
class JpaProductEntity {
@Id
private ProductId id;
private String payload;
private Integer version;
public JpaProductEntity() {
}
public void setId(ProductId id) {
this.id = id;
}
public String getPayload() {
return payload;
}
public void setPayload(String payload) {
this.payload = payload;
}
public Integer getVersion() {
return version;
}
public void setVersion(Integer version) {
this.version = version;
}
}
Id class
public class ProductId implements Serializable {
private static final long serialVersionUID = -6110163899364126142L;
private String identifier;
public ProductId(String identifier) {
this.identifier = identifier;
}
public static ProductId from(String identifier) {
Assert.notNull(identifier, "Identifier cannot be null");
return new ProductId(identifier);
}
public static ProductId generate() {
return new ProductId(Id.generateIdentifier());
}
}
此外,转换器:
@Converter(autoApply = true)
public class ProductIdPostgresUuidConverter implements AttributeConverter<ProductId, UUID> {
@Override
public UUID convertToDatabaseColumn(ProductId attribute) {
return UUID.fromString(attribute.toString());
}
@Override
public ProductId convertToEntityAttribute(UUID dbData) {
return ProductId.from(dbData.toString());
}
}
看来,转换器完全不起作用(我在转换器方法中设置了断点,但没有任何反应,调试器不会进入那里)。
答案 0 :(得分:0)
试试这个:
@Entity(name = "products")
class JpaProductEntity {
@Type(type = "pg-uuid") // tells what type will be internally used by DB
// Definitely need to instruct JPA to use your converter
@Convert(converter = ProductIdPostgresUuidConverter.class)
@Id
private ProductId id;
}
提示:您可能有多个相同类型的转换器,可供您自行决定使用。您需要明确告诉JPA使用哪一个。