After some further reseach I found out that the used types do not matter. My
work-a-round now is to put the properties on the parent-object and hide them
except on the subclasses intended.
Are there any known limits that I miss?
Or can columns only be added to empty tables or ...?
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Hi Johan,
I can only tell you how I do it:
On the subclass:
@javax.jdo.annotations.PersistenceCapable
@javax.jdo.annotations.Inheritance(
strategy = InheritanceStrategy.SUPERCLASS_TABLE)
On the superclass:
@javax.jdo.annotations.PersistenceCapable(
identityType = IdentityType.DATASTORE)
@javax.jdo.annotations.Inheritance(
strategy = InheritanceStrategy.NEW_TABLE)
@javax.jdo.annotations.Discriminator(
strategy = DiscriminatorStrategy.CLASS_NAME,
column = "discriminator")
@javax.jdo.annotations.DatastoreIdentity(
strategy = IdGeneratorStrategy.IDENTITY,
column = "id")
And on the LocalDate properties of the subclass:
@Persistent
private LocalDate paymentDate;
@Column(allowsNull = "true")
public LocalDate getPaymentDate() {
return paymentDate;
}
HTH
On 18 February 2015 at 14:28, wrote:
> Hi,
>
>
>
> I encounter a problem with using JDO inheritance strategy="superclass-table".
>
> When trying to create an instance for the first time (Type LocalDate) my
> application freezes.
>
> Last output below.
>
>
>
> Anybody encountered this before?
>
>
>
> I have tested with MySQL (then it hangs as well with creating fixtures as
> with creating instance manually)
>
> and HSQLDB in-memory (then it hangs only with fixtures, not when creating
> manually)
>
>
>
> gtrz Johan
>
>
>
>
> 14:20:45,798 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Table ProfileElement will manage the persistence of the fields for
> class info.matchingservice.dom.Profile.ProfileElementTimePeriod (inheritance
> strategy="superclass-table")
>
> 14:20:45,798 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Column "ProfileElement.endDate" added to internal representation of
> table.
>
> 14:20:45,798 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Field
> [info.matchingservice.dom.Profile.ProfileElementTimePeriod.endDate] ->
> Column(s) [ProfileElement.endDate] using mapping of type
> "org.datanucleus.store.rdbms.mapping.JodaLocalDateMapping"
> (org.datanucleus.store.rdbms.mapping.datastore.DateRDBMSMapping)
>
> 14:20:45,798 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Column "ProfileElement.startDate" added to internal representation of
> table.
>
> 14:20:45,798 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Field
> [info.matchingservice.dom.Profile.ProfileElementTimePeriod.startDate] ->
> Column(s) [ProfileElement.startDate] using mapping of type
> "org.datanucleus.store.rdbms.mapping.JodaLocalDateMapping"
> (org.datanucleus.store.rdbms.mapping.datastore.DateRDBMSMapping)
>
> 14:20:45,799 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Schema Transaction started with connection
> "org.datanucleus.store.rdbms.datasource.dbcp.PoolingDataSource$PoolGuardConnectionWrapper@9a8252e"
> with isolation "serializable"
>
> 14:20:45,800 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Check of existence of ProfileElement returned table type of TABLE
>
> 14:20:45,800 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Loading column info for table(s) "Assessment,
> DropDownForProfileElement, Config, Supply, TagHolder, Demand,
> PersistedProfileElementComparison, DemandAssessment, ProfileMatch,
> SystemRole, IsisSecurityApplicationUser, TagCategory,
> ProfileElementTypeMatchingRule, Actor, Tag, ProfileTypeMatchingRule, System,
> ProfileComparison, Competence, ProfileAssessment, OrganisationRole,
> CompetenceCategory, IsisSecurityApplicationTenancy, Profile, Organisation,
> ProfileElement, IsisSecurityApplicationPermission,
> IsisSecurityApplicationRole, IsisSecurityApplicationUserRoles,
> MatchingTrustedContact, Role, SupplyAssessment, Person, PersonRole" in
> Catalog "", Schema ""
>
> 14:20:45,873 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Column info loaded for Catalog "", Schema "", 34 tables, time = 73 ms
>
> 14:20:45,873 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Column info retrieved for table "ProfileElement" : 15 columns found
>
> 14:20:45,873 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Creating column startDate for table ProfileElement
>
> 14:20:45,873 [Schema 1593650877@qtp-1528405038-0
> DEBUG] Creating column endDate for table ProfileElement
>
> 14:20:45,873 [Schema 1593650877@qtp-1528405038-0
> DEBUG] ALTER TABLE ProfileElement ADD COLUMN startDate DATE NULL
>
>
>
