I have a model "WAHImage" with the following getter and setter:
@Column(name = "is_deleted") public boolean getIsDeleted() { return isDeleted; } public void setIsDeleted(boolean isDeleted) { this.isDeleted = isDeleted; } And a Spring Data JPA Repository:
public interface ImageRepository extends JpaRepository<WAHImage, Long>, QueryDslPredicateExecutor<WAHImage> { Page<WAHImage> findAllByIsDeleted(boolean isDeleted, Pageable page); } And a Spring Boot (1.5.1) Service, which has ImageRepository autowired in its constructor:
@Service public class ImageService { private ImageRepository imageRepository; public Page<WAHImage> get(Pageable pageable) { return imageRepository.findAllByIsDeleted(false, ImagePredicates.orderByName(pageable)); } ImagePredicates.orderByName(Pageable) looks like:
static QPageRequest orderByName(Pageable page) { QWAHImage image = QWAHImage.wAHImage; QWACensusImpl name = image.census; QSpecimenImpl specimen = image.specimen; OrderSpecifier genus = name.name1.coalesce(specimen.genus).asc(); OrderSpecifier species = name.name2.coalesce(specimen.species).asc(); OrderSpecifier rank = name.rank4.coalesce( name.rank3.coalesce(specimen.rank)).asc(); OrderSpecifier infraspecies = name.name4.coalesce( name.name3.coalesce(specimen.infraspecies)).asc(); OrderSpecifier[] sort = new OrderSpecifier[] { genus, species, rank, infraspecies }; return new QPageRequest(page.getPageNumber(), page.getPageSize(), sort); } And a Spring Boot Controller:
@Controller public class ImageController { @GetMapping("/list") public String list(Pageable pageable, Model model) { Page<WAHImage> searchResult = imageService.get(pageable); } } Why am I getting No property coalesce(wAHImage found for type WAHImage!? Do I have to handle nulls in the coalesce() statements in ImagePredicates.orderByName? If so, how?
org.springframework.data.mapping.PropertyReferenceException: No property coalesce(wAHImage found for type WAHImage! at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:77) at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:329) at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:309) at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:272) at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) at org.springframework.data.jpa.repository.query.QueryUtils.toJpaOrder(QueryUtils.java:542) at org.springframework.data.jpa.repository.query.QueryUtils.toOrders(QueryUtils.java:496) at org.springframework.data.jpa.repository.query.JpaQueryCreator.complete(JpaQueryCreator.java:195) at org.springframework.data.jpa.repository.query.JpaQueryCreator.complete(JpaQueryCreator.java:143) at org.springframework.data.jpa.repository.query.JpaQueryCreator.complete(JpaQueryCreator.java:52) at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:88) at org.springframework.data.jpa.repository.query.PartTreeJpaQuery$QueryPreparer.createQuery(PartTreeJpaQuery.java:144) at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.doCreateQuery(PartTreeJpaQuery.java:79) at org.springframework.data.jpa.repository.query.AbstractJpaQuery.createQuery(AbstractJpaQuery.java:190) at org.springframework.data.jpa.repository.query.JpaQueryExecution$PagedExecution.doExecute(JpaQueryExecution.java:184) at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:85) at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:116) at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:106) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:483) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:461) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:57) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) at com.sun.proxy.$Proxy143.findAllByIsDeleted(Unknown Source) at x.y.z.image.ImageService.get(ImageService.java:120) at x.y.z.image.ImageService$$FastClassBySpringCGLIB$$6d3a7999.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:652) at x.y.z.image.ImageService$$EnhancerBySpringCGLIB$$21037cfe.get(<generated>) at x.y.z.controller.image.ImageController.list(ImageController.java:132) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) Update: added entity and generated QueryDSL class.
Full WAHImage model class.
@Entity @Table(name = "image") public class WAHImage extends PersistentImpl { private WACensusImpl census = new WACensusImpl(); private SpecimenImpl specimen = new SpecimenImpl(); private UserImpl author = new UserImpl(); private LookupImpl copyright = new LookupImpl(); private LookupImpl allowedUse = new LookupImpl(); private String imageType; private String description; private String locality; private String imageNotes; private String authorCode; private Set<LookupImpl> keywords = new HashSet<>(); private boolean isDeleted = Boolean.FALSE; private static final long serialVersionUID = 4187307837824004338L; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "census_id", nullable = true) public WACensusImpl getCensus() { return census; } public void setCensus(WACensusImpl census) { this.census = census; } @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "specimen_id", nullable = true) public SpecimenImpl getSpecimen() { return specimen; } public void setSpecimen(SpecimenImpl specimen) { this.specimen = specimen; } @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "author_id", nullable = false) public UserImpl getAuthor() { return author; } public void setAuthor(UserImpl author) { this.author = author; } @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "copyright_id", nullable = false) public LookupImpl getCopyright() { return copyright; } public void setCopyright(LookupImpl copyright) { this.copyright = copyright; } @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "allowed_use_id", nullable = false) public LookupImpl getAllowedUse() { return allowedUse; } public void setAllowedUse(LookupImpl allowedUse) { this.allowedUse = allowedUse; } @Column(name = "image_type") public String getImageType() { return imageType; } public void setImageType(String imageType) { this.imageType = imageType; } @Column(name = "description") public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } @Column(name = "locality") public String getLocality() { return locality; } public void setLocality(String locality) { this.locality = locality; } @Column(name = "image_notes") public String getImageNotes() { return imageNotes; } public void setImageNotes(String imageNotes) { this.imageNotes = imageNotes; } @Column(name = "author_code") public String getAuthorCode() { return authorCode; } public void setAuthorCode(String authorCode) { this.authorCode = authorCode; } @ManyToMany(cascade = CascadeType.ALL) @JoinTable(name = "image_keyword", joinColumns = { @JoinColumn(name = "image_id") }, inverseJoinColumns = {@JoinColumn(name = "keyword_id", unique = false) }) public Set<LookupImpl> getKeywords() { return keywords; } public void setKeywords(Set<LookupImpl> keywords) { this.keywords = keywords; } @Column(name = "is_deleted") public boolean getIsDeleted() { return isDeleted; } public void setIsDeleted(boolean isDeleted) { this.isDeleted = isDeleted; } @Override public String toString() { return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE) .append(getId()) .append(getAuthor()) .append(getImageType()) .toString(); } } Full QueryDSL class.
/** * QWAHImage is a Querydsl query type for WAHImage */ @Generated("com.querydsl.codegen.EntitySerializer") public class QWAHImage extends EntityPathBase<WAHImage> { private static final long serialVersionUID = 2019538268L; private static final PathInits INITS = PathInits.DIRECT2; public static final QWAHImage wAHImage = new QWAHImage("wAHImage"); public final x.y.z.db.impl.QPersistentImpl _super = new x.y.z.db.impl.QPersistentImpl(this); //inherited public final NumberPath<Long> addedBy = _super.addedBy; //inherited public final DateTimePath<java.util.Date> addedOn = _super.addedOn; public final x.y.z.lookup.impl.QLookupImpl allowedUse; public final x.y.z.user.impl.QUserImpl author; public final StringPath authorCode = createString("authorCode"); public final x.y.z.reference.census.impl.QWACensusImpl census; public final x.y.z.lookup.impl.QLookupImpl copyright; public final StringPath description = createString("description"); //inherited public final NumberPath<Long> id = _super.id; public final StringPath imageNotes = createString("imageNotes"); public final StringPath imageType = createString("imageType"); public final BooleanPath isDeleted = createBoolean("isDeleted"); public final SetPath<x.y.z.lookup.impl.LookupImpl, x.y.z.lookup.impl.QLookupImpl> keywords = this.<x.y.z.lookup.impl.LookupImpl, x.y.z.lookup.impl.QLookupImpl>createSet("keywords", x.y.z.lookup.impl.LookupImpl.class, x.y.z.lookup.impl.QLookupImpl.class, PathInits.DIRECT2); public final StringPath locality = createString("locality"); public final x.y.z.reference.specimen.impl.QSpecimenImpl specimen; //inherited public final NumberPath<Long> updatedBy = _super.updatedBy; //inherited public final DateTimePath<java.util.Date> updatedOn = _super.updatedOn; public QWAHImage(String variable) { this(WAHImage.class, forVariable(variable), INITS); } public QWAHImage(Path<? extends WAHImage> path) { this(path.getType(), path.getMetadata(), PathInits.getFor(path.getMetadata(), INITS)); } public QWAHImage(PathMetadata metadata) { this(metadata, PathInits.getFor(metadata, INITS)); } public QWAHImage(PathMetadata metadata, PathInits inits) { this(WAHImage.class, metadata, inits); } public QWAHImage(Class<? extends WAHImage> type, PathMetadata metadata, PathInits inits) { super(type, metadata, inits); this.allowedUse = inits.isInitialized("allowedUse") ? new x.y.z.lookup.impl.QLookupImpl(forProperty("allowedUse")) : null; this.author = inits.isInitialized("author") ? new x.y.z.user.impl.QUserImpl(forProperty("author")) : null; this.census = inits.isInitialized("census") ? new x.y.z.reference.census.impl.QWACensusImpl(forProperty("census")) : null; this.copyright = inits.isInitialized("copyright") ? new x.y.z.lookup.impl.QLookupImpl(forProperty("copyright")) : null; this.specimen = inits.isInitialized("specimen") ? new x.y.z.reference.specimen.impl.QSpecimenImpl(forProperty("specimen")) : null; } } 
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