You was correct.
I re-ran the templates, by removing the capitalization in the property
field, and letting intact the generated @Property(), only to see the
result.
The error was gone.
So i am going to resume using the template to generate skeleton code
for some other entities. Thanks Dan for your fast answer.
-Eder
2017-02-14 10:28 GMT-04:00, Dan Haywood <d...@haywood-associates.co.uk>:
> OK, this is pretty obscure, but it's because you've capitalized
> "Description". Change it to:
>
> @Column(allowsNull = "false")
> @Property
> @Getter @Setter
> private String description;
>
> Also, there's no need for @Property in this case... you haven't specified
> any additional semantics.
>
> Why is this the fix?
>
> The @Column is a JDO annotaiton, @Property is an Isis annotation.
>
> JDO and Isis have different rules, unfortunately, for whether a
> property/field should be treated as optional or not. For JDO, primitives
> are treated as mandatory, everything else as optional. For Isis, it treats
> everything as mandatory.
>
> The metamodel validation error is attempting to warn that there's an
> incompatibility here. In Isis a property is really identified by the
> getter method (in this case autogenerated by Lombok). In order to support
> the use of Lombok, the framework looks for annotations both on the getter
> method and also on any backing instance field. However, it infers the
> backing field from the getter ... so getDescription() is expected to be
> backed by "description", not "Description".
>
> Hope that makes sense. Raise a ticket in JIRA if you can think of a better
> way for us to handle this....
>
> Dan
>
>
> On Tue, 14 Feb 2017 at 14:10 L Eder <eder200...@gmail.com> wrote:
>
>> The intact template-generated source code was:
>>
>> Component.java:
>> "
>> package domainapp.dom.PPB;
>>
>> import javax.jdo.annotations.Column;
>> import javax.jdo.annotations.DatastoreIdentity;
>> import javax.jdo.annotations.IdGeneratorStrategy;
>> import javax.jdo.annotations.IdentityType;
>> import javax.jdo.annotations.PersistenceCapable;
>> import javax.jdo.annotations.Queries;
>> import javax.jdo.annotations.Query;
>> import javax.jdo.annotations.Unique;
>> import javax.jdo.annotations.Version;
>> import javax.jdo.annotations.VersionStrategy;
>>
>> import org.apache.isis.applib.annotation.BookmarkPolicy;
>> import org.apache.isis.applib.annotation.DomainObject;
>> import org.apache.isis.applib.annotation.DomainObjectLayout;
>> import org.apache.isis.applib.annotation.Editing;
>> import org.apache.isis.applib.annotation.Property;
>>
>> import lombok.Getter;
>> import lombok.Setter;
>>
>> @PersistenceCapable(
>> identityType = IdentityType.DATASTORE,
>> schema = "PPB",
>> table = "Component"
>> )
>> @DatastoreIdentity(
>> strategy = IdGeneratorStrategy.IDENTITY,
>> column = "id")
>> @Version(
>> strategy = VersionStrategy.VERSION_NUMBER,
>> column = "version")
>> @Queries({
>> @Query(
>> name = "find", language = "JDOQL",
>> value = "SELECT "
>> + "FROM domainapp.dom.PPB.Component "),
>> @Query(
>> name = "findByDescriptionContains", language = "JDOQL",
>> value = "SELECT "
>> + "FROM domainapp.dom.PPB.Component "
>> + "WHERE Description.indexOf(:Description) >= 0
>> "),
>> @Query(
>> name = "findByDescription", language = "JDOQL",
>> value = "SELECT "
>> + "FROM domainapp.dom.PPB.Component "
>> + "WHERE Description == :Description ")
>> })
>> @Unique(name = "Component_Description_UNQ", members = { "Description" })
>> @DomainObject(
>> editing = Editing.DISABLED
>> )
>> @DomainObjectLayout(
>> bookmarking = BookmarkPolicy.AS_ROOT
>> )
>> public class Component implements Comparable<Component> {
>>
>> @Column(allowsNull = "false")
>> @Property()
>> @Getter @Setter
>> private String Description;
>>
>> //region > compareTo, toString
>> @Override
>> public int compareTo(final Component other) {
>> return org.apache.isis.applib.util.ObjectContracts.compare(this,
>> other, "Description");
>> }
>>
>> @Override
>> public String toString() {
>> return org.apache.isis.applib.util.ObjectContracts.toString(this,
>> "Description");
>> }
>> //endregion
>>
>> }
>> "
>>
>> ComponentMenu.java:
>> "
>> package domainapp.dom.PPB;
>>
>> import org.apache.isis.applib.annotation.Action;
>> import org.apache.isis.applib.annotation.ActionLayout;
>> import org.apache.isis.applib.annotation.BookmarkPolicy;
>> import org.apache.isis.applib.annotation.DomainService;
>> import org.apache.isis.applib.annotation.DomainServiceLayout;
>> import org.apache.isis.applib.annotation.MemberOrder;
>> import org.apache.isis.applib.annotation.NatureOfService;
>> import org.apache.isis.applib.annotation.RestrictTo;
>> import org.apache.isis.applib.annotation.SemanticsOf;
>>
>> @DomainService(
>> nature = NatureOfService.VIEW_MENU_ONLY
>> )
>> @DomainServiceLayout(
>> named = "Components",
>> menuOrder = "210"
>> )
>> public class ComponentMenu {
>>
>> @Action(
>> semantics = SemanticsOf.SAFE,
>> restrictTo = RestrictTo.PROTOTYPING
>> )
>> @ActionLayout(
>> bookmarking = BookmarkPolicy.AS_ROOT
>> )
>> @MemberOrder(sequence = "1")
>> public java.util.List<Component> listAll() {
>> return componentrepository.listAll();
>> }
>>
>> @Action(
>> semantics = SemanticsOf.SAFE
>> )
>> @ActionLayout(
>> bookmarking = BookmarkPolicy.AS_ROOT
>> )
>> @MemberOrder(sequence = "2")
>> public java.util.List<Component> findByDescription(
>> final String Description
>> ) {
>> return
>> componentrepository.findByDescriptionContains(Description);
>> }
>>
>> @Action(
>> )
>> @MemberOrder(sequence = "3")
>> public Component create(
>> final String Description) {
>> return componentrepository.create(Description);
>> }
>>
>> @javax.inject.Inject
>> ComponentRepository componentrepository;
>> }
>> "
>>
>> ComponentRepository.java:
>> "
>> package domainapp.dom.PPB;
>>
>> import org.apache.isis.applib.annotation.DomainService;
>> import org.apache.isis.applib.annotation.NatureOfService;
>> import org.apache.isis.applib.annotation.Programmatic;
>>
>> @DomainService(
>> nature = NatureOfService.DOMAIN,
>> repositoryFor = Component.class
>> )
>> public class ComponentRepository {
>>
>> @Programmatic
>> public java.util.List<Component> listAll() {
>> return container.allInstances(Component.class);
>> }
>>
>> @Programmatic
>> public Component findByDescription(
>> final String Description
>> ) {
>> return container.uniqueMatch(
>> new org.apache.isis.applib.query.QueryDefault<>(
>> Component.class,
>> "findByDescription",
>> "Description", Description));
>> }
>>
>> @Programmatic
>> public java.util.List<Component> findByDescriptionContains(
>> final String Description
>> ) {
>> return container.allMatches(
>> new org.apache.isis.applib.query.QueryDefault<>(
>> Component.class,
>> "findByDescriptionContains",
>> "Description", Description));
>> }
>>
>> @Programmatic
>> public Component create(final String Description) {
>> final Component component =
>> container.newTransientInstance(Component.class);
>> component.setDescription(Description);
>> container.persistIfNotAlready(component);
>> return component;
>> }
>>
>> @Programmatic
>> public Component findOrCreate(
>> final String Description
>> ) {
>> Component component = findByDescription(Description);
>> if (component == null) {
>> component = create(Description);
>> }
>> return component;
>> }
>>
>> @javax.inject.Inject
>> org.apache.isis.applib.DomainObjectContainer container;
>> }
>> "
>>
>>
>> ---------- Forwarded message ----------
>> From: L Eder <eder200...@gmail.com>
>> Date: Tue, 14 Feb 2017 10:00:48 -0400
>> Subject: Error "The application failed to start due to a number of
>> metamodel validation errors..."
>> To: users@isis.apache.org
>>
>> Hello isis users:
>>
>> I tried to create my first domain object, called Component, using the
>> file templates.
>>
>> I created a package under the dom module, and created the files
>> Component. java, ComponentMenu.java, and ComponentRepository.java.
>>
>> I then ran the project, without build errors.
>>
>> However, opening the browser at http://localhost:8080/wicket/ i got this:
>>
>> Error “The application failed to start due to a number of metamodel
>> validation errors. domainapp.dom.PPB.Component#description:
>> incompatible default handling of required/optional properties between
>> Isis and JDO; add @javax.jdo.annotations.Column(allowsNull="...")”
>>
>> Source: web browser
>>
>> Any help is appreciated, thanks
>>
>
