无法识别Springboot cassandra冻结值

Question

我有一个与cassandra连接的springboot应用程序。我试图在地图中创建地图，但遇到以下异常。在我看来，即使我使用了冻结值，它仍在发送cal，但没有关键字冻结

错误

Caused by: org.springframework.data.cassandra.CassandraInvalidQueryException: Query; CQL [CREATE TABLE IF NOT EXISTS assessmentsubmissionentity (studentid text, assessmentid text, values map<text, map<text, text>>, PRIMARY KEY ((studentid, assessmentid)));]; Non-frozen collections are not allowed inside collections: map<text, map<text, text>>; nested exception is com.datastax.driver.core.exceptions.InvalidQueryException: Non-frozen collections are not allowed inside collections: map<text, map<text, text>>
    at org.springframework.data.cassandra.core.cql.CassandraExceptionTranslator.translate(CassandraExceptionTranslator.java:139) ~[spring-data-cassandra-2.1.2.RELEASE.jar:2.1.2.RELEASE]
    at org.springframework.data.cassandra.core.cql.CassandraAccessor.translate(CassandraAccessor.java:334) ~[spring-data-cassandra-2.1.2.RELEASE.jar:2.1.2.RELEASE]
Caused by: com.datastax.driver.core.exceptions.InvalidQueryException: Non-frozen collections are not allowed inside collections: map<text, map<text, text>>
    at com.datastax.driver.core.exceptions.InvalidQueryException.copy(InvalidQueryException.java:49) ~[cassandra-driver-core-3.6.0.jar:na]

代码

@Table
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
public class AssessmentSubmissionEntity implements Serializable {

    @PrimaryKeyColumn(type = PrimaryKeyType.PARTITIONED)
    private String studentId;

    @PrimaryKeyColumn(type = PrimaryKeyType.PARTITIONED)
    private String assessmentId;

    @FrozenValue
    @Column
    private Map <String, Map<String, String>> values;

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        AssessmentSubmissionEntity that = (AssessmentSubmissionEntity) o;
        return Objects.equals(studentId, that.studentId) &&
                Objects.equals(assessmentId, that.assessmentId) &&
                Objects.equals(values, that.values);
    }

    @Override
    public int hashCode() {

        return Objects.hash(studentId, assessmentId, values);
    }
}

马文

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-cassandra</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.datastax.cassandra</groupId>
                    <artifactId>cassandra-driver-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-mapping</artifactId>
        </dependency>

Answer 1

Cassandra的Spring数据有一个问题——它们没有冻结集合的映射。参见JIRA中的DATACASS-465——它是在一年多前提交的，但在这方面没有进展。。。

我认为唯一的解决方案是使用DataStax Java驱动程序中的对象映射器，或者通过CQL管理您的表。