[英]Protocol Buffer: Changing field type from string to stringValue is backward compatible?
[英]QueryDSL with MongoDB can't serialize property from type Long to String when filtering using stringValue() or like()
我正在嘗試使用 QueryDSL、MongoDB 和 Spring 數據查詢/過濾一些簡單數據。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
<version>2.2.0.M4</version>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<version>4.2.1</version>
<artifactId>querydsl-core</artifactId>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>4.2.1</version>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-mongodb</artifactId>
<version>4.2.1</version>
</dependency>
@Getter
@Setter
@Document
public class Library {
private Address address;
@NotNull
private Long books = 4L;
...
}
我的第一種方法:
public Page<Library> findAll(Predicate predicate, MultiValueMap<String, String> parameters) {
final QLibrary qLibrary = QLibrary.library;
final BooleanBuilder builder = new BooleanBuilder();
if (parameters.containsKey("booksCount")) {
builder.and(qLibrary.booksCount.stringValue().startsWith(parameters.getFirst("booksCount")));
}
final BooleanExpression expression = (BooleanExpression) predicate;
return repository.findAll(expression.and(builder.getValue()), Pageable.unpaged());
}
我的第二種方法:
public class LibraryBindings implements QuerydslBinderCustomizer<QLibrary> {
@Override
public void customize(QuerydslBindings bindings, QLibrary root) {
bindings.bind(root.booksCount).first(new SingleValueBinding<NumberPath<Long>, Long>() {
@Override
public Predicate bind(NumberPath<Long> path, Long value) {
return path.stringValue().startsWith(value.toString());
}
});
}
}
我的第三種方法:
public class LibraryBindings implements QuerydslBinderCustomizer<QLibrary> {
@Override
public void customize(QuerydslBindings bindings, QLibrary root) {
bindings.bind(root.booksCount).first(new SingleValueBinding<NumberPath<Long>, Long>() {
@Override
public Predicate bind(NumberPath<Long> path, Long value) {
return path.like(value.toString());
}
});
}
}
使用上面的方法我得到一個例外:
java.lang.UnsupportedOperationException: Illegal operation str(library.booksCount)
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.visit(MongodbDocumentSerializer.java:323) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.visit(MongodbDocumentSerializer.java:54) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at com.querydsl.core.types.OperationImpl.accept(OperationImpl.java:83) ~[querydsl-core-4.2.1.jar:na]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.asDBValue(MongodbDocumentSerializer.java:146) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.asDBKey(MongodbDocumentSerializer.java:138) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.SpringDataMongodbSerializer.asDBKey(SpringDataMongodbSerializer.java:158) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.visit(MongodbDocumentSerializer.java:227) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.visit(MongodbDocumentSerializer.java:54) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at com.querydsl.core.types.OperationImpl.accept(OperationImpl.java:83) ~[querydsl-core-4.2.1.jar:na]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.handle(MongodbDocumentSerializer.java:58) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.visit(MongodbDocumentSerializer.java:185) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.visit(MongodbDocumentSerializer.java:54) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at com.querydsl.core.types.OperationImpl.accept(OperationImpl.java:83) ~[querydsl-core-4.2.1.jar:na]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.handle(MongodbDocumentSerializer.java:58) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.MongodbDocumentSerializer.toQuery(MongodbDocumentSerializer.java:69) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.QuerydslAbstractMongodbQuery.createQuery(QuerydslAbstractMongodbQuery.java:166) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.QuerydslFetchableMongodbQuery.createQuery(QuerydslFetchableMongodbQuery.java:197) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.QuerydslFetchableMongodbQuery.createQuery(QuerydslFetchableMongodbQuery.java:190) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.QuerydslFetchableMongodbQuery.fetch(QuerydslFetchableMongodbQuery.java:111) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.SpringDataMongodbQuery.fetch(SpringDataMongodbQuery.java:28) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor.findAll(QuerydslMongoPredicateExecutor.java:160) ~[spring-data-mongodb-2.2.0.M4.jar:2.2.0.M4]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359) ~[spring-data-commons-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200) ~[spring-data-commons-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:641) ~[spring-data-commons-2.2.0.M4.jar:2.2.0.M4]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.0.M2.jar:5.2.0.M2]
所有其他過濾器/查詢都正常工作(比較字符串、比較數字與數字或布爾值與布爾值等)。 QueryDSL 已正確配置。
假設用戶可以按booksCount
過濾對象並且他有四個圖書館 object 可用:
當用戶按書籍數量過濾並輸入數字 X 時,我想顯示數量為 Y 的對象:
booksCount
的對象。booksCount
的對象。booksCount
7 的對象。booksCount
127 的對象。就那么簡單。 我的問題是:
先感謝您。
據我們所知, DBObject
查詢不支持將數字轉換為字符串,因此在使用querydsl-mongodb
時目前不支持stringValue()
操作。
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