[英]Queries collections with spring data and querydsl
I have the following domain model: 我有以下域模型:
@Entity
public class Sample {
// id and other stuff
private boolean deleted;
private Set<Occurrence> occurrences;
// Constructors, getter and setter
}
@Entity
public class Occurrence {
// id and other stuff
private boolean deleted;
private Classification classification;
// Constructors, getter and setter
}
@Entity
public class Classification {
private int id;
// other stuff
}
I want to find with QueryDSL and Spring Data JPA all Samples which are not deleted and contain an occurrence witch is not deleted and contains a classification with the id 47. 我想使用QueryDSL和Spring Data JPA查找未删除并包含出现事件的所有示例,并且未删除并包含ID为47的分类。
I allready have a BooleanExpression for the not deleted samples: qSample.deleted.isFalse()
and a SubQuery for the not delted occurrence which has a certain classification id: 我已经为未删除的样本准备了一个BooleanExpression: qSample.deleted.isFalse()
和一个没有查询的子查询,该查询具有一定的分类ID:
JPASubQuery occurrenceSubQuery = new JPASubQuery();
QOccurrence qOccurrence = QOccurrence.occurrence;
occurrenceSubQuery.from().where(
qOccurrence.in(qSample.occurrences),
qOccurrence.deleted.isFalse(),
qOccurrence.classification.id
.eq(queryId));
What's missing is: how to bring these parts together to a predicate for the spring data repository? 缺少的是:如何将这些部分放到spring数据存储库的谓词中?
Regards 问候
Daniel 丹尼尔
You can use 您可以使用
com.mysema.query.support.Expressions.allOf(...)
or 要么
a.and(b).and(c)...
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