querydsl

问题 I was unable to find any way of implementing fetch plans in QueryDSL, and I tried a lot. Can you provide me any hints? Also, do you know any better way of chosing which fields to fetch and which load lazily in different situations? I use batch fetching, therefore I can't use JOIN FETCH. 回答1: With an EntityGraph definition like this @NamedEntityGraph( name = "post", attributeNodes = { @NamedAttributeNode("title"), @NamedAttributeNode(value = "comments", subgraph = "comments") }, subgraphs = {

问题 Similarly to this question I would like to perform an SQL "like" operation using my own user defined type called "AccountNumber". The QueryDSL Entity class the field which defines the column looks like this: public final SimplePath<com.myorg.types.AccountNumber> accountNumber; I have tried the following code to achieve a "like" operation in SQL but get an error when the types are compared before the query is run: final Path path=QBusinessEvent.businessEvent.accountNumber; final Expression

问题 Im having trouble using QueryDSL to filter with the below entities: @Entity @Table(name = "newidea") @Cacheable(true) @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) public class NewIdea extends DomainObject implements Membership { //id, other attributes etc @OneToMany(fetch = FetchType.LAZY, mappedBy = "key.idea", cascade = CascadeType.ALL, orphanRemoval = true) @QueryInit("newIdeaParticipations.key.student") private Set<NewIdeaParticipation> newIdeaParticipations = new HashSet

问题 I generate My Qclasses in target/generated-sources/java and the Qclasses are generating good but when i want to use them in my src code /YY/src/controller/XXX.java for example like that QLot lot = QLot.lot; I get QLot cannot be resolved to a variable . It seems that the generated Qclasses are not in the classpath !! <plugin> <groupId>com.mysema.maven</groupId> <artifactId>apt-maven-plugin</artifactId> <version>1.0.6</version> <executions> <execution> <goals> <goal>process</goal> </goals>

问题 I would like to update my version of Querydsl. I was looking for generating Q-Classes with the apt-maven-plugin like this: <plugin> <groupId>com.mysema.maven</groupId> <artifactId>apt-maven-plugin</artifactId> <version>1.1.3</version> <executions> <execution> <goals> <goal>process</goal> </goals> <configuration> <outputDirectory>target/generated-sources/java</outputDirectory> <processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor> </configuration> </execution> </executions> <

问题 i basically have this dataset: userid: 123456 content: Lorem ispum userid: 123456 content: Lorem ispum userid: 123456 content: Lorem ispum userid: 1234567 content: Lorem ispum userid: 1234567 content: Lorem ispum userid: 12345678 content: Lorem ispum What i want to see: How many users have one entry?, two entries?, three entries? etc. I already know how i can see "How many entries" per user but i want the inverse... Anybody could help me with this issue? Thanks and Greetings! 回答1: You can

问题 I am using QueryDSL with Spring Data Jpa and i want execute some dynamic search. I follow this Answer and it's okey with BooleanBuilder But in my case I have to make joins. So how can i make it if i have 3 joins on player , player_team , team and i have optional parameters on the name of player and name of his team ? ________ ___________________ _______ | player | | player_team | | team | |------ | |---------------- | |-------| | id | | player_team_id (pk) | | id | | name | | player_id (fk) |

问题 How do I implement https://stackoverflow.com/a/16392399/14731 using QueryDSL SQL? I understand that new SQLSubQuery().from(customer).where(customer.email.eq("foo@example.com")) models select customer where customer.email = 'foo@example.com' but I don't understand how to select [literal] such as: select 1 from customer or select 'foo@example.com', 0 as required by the aforementioned link. 回答1: If it is ok to use parameters then using constants should work new SQLSubQuery().from(customer)

问题 I am trying to use Mongodb with spring-data and QueryDsl. I have following entitys: @QueryEntity @Document(collection="groups") public class GroupImpl implements Group { private String name; @DBref private List<User> groupMembers; and @QueryEntity @Document(collection="users") public class UserImpl implements User{ public static final String FIRST_NAME = "firstName"; public static final String LAST_NAME = "lastName"; My Repositories are implemented like this: public interface GroupRepository

问题 I find that there is many question like mine but never had the answer to enable Querydsl in my Spring-boot project. this is my pom.xml dependency and plugin: <properties> <querydsl.version>3.7.4</querydsl.version> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build