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Jeroen van der Wal commented on ISIS-852: ----------------------------------------- I don't know if this is a bug, Isis is just not designed to enable editing of derived properties. The pattern we are using is disabling the edit button (by adding @Immutable) and only allow changes through an action. In your case: {code} @javax.jdo.annotations.Persistent private DateTime beginAt; public DateTime getBeginAt() { return beginAt; } public void setBeginAt(DateTime beginAt) { this.beginAt = beginAt; } public AbstractDomainObject changeBeginDate(LocalDate beginDate) { setBeginAt(getBeginAt().withDate(beginDate.getYear(), beginDate.getMonthOfYear(), beginDate.getDayOfMonth())); return this; } {code} > Derived property cannot be written properly > ------------------------------------------- > > Key: ISIS-852 > URL: https://issues.apache.org/jira/browse/ISIS-852 > Project: Isis > Issue Type: Bug > Components: Core, Core: Objectstore: JDO > Affects Versions: objectstore-jdo-1.5.0, core-1.5.0 > Reporter: Thomas Koren > Assignee: Dan Haywood > > when using the proposed modifyXxx syntax to make a derived property writable, > it is rendered as "disabled" in wicket viewer. > {code:title=demo|borderStyle=solid} > public LocalDate getDerivedDate() { ... } > public void modifyDerivedDate(final LocalDate date) { ... } > {code} > when using the alternative setXxx syntax, the UI component is writable. but > in this case, the value of the derived property is not written to the > persisted property. > {code:title=demo|borderStyle=solid} > // {{ BeginAt (property) > @javax.jdo.annotations.Persistent > private DateTime beginAt; > @Disabled > @javax.jdo.annotations.Column(allowsNull = "false") > public DateTime getBeginAt() { > return beginAt; > } > public void setBeginAt(final DateTime beginAt) { > this.beginAt = beginAt; > } > // }} > // {{ DerivedDate (property) > @NotPersisted > @NotPersistent > public LocalDate getDerivedDate() { > return getBeginAt().toLocalDate(); > } > public void setDerivedDate(final LocalDate beginDate) { > setBeginAt(getBeginAt().withDate(beginDate.getYear(), > beginDate.getMonthOfYear(), beginDate.getDayOfMonth())); > } > // }} > {code} > it seems like the value set by the derived property gets overwritten by the > original/old value of the persisted property that is displayed in the wicket > component. > therefore it might only be an issue, if original and derived properties are > members of the same entity and displayed via wicket viewer. > some background: > i try to use 3 ui components (= derived properties: date, hour, minute) to > set a single persisted DateTime property. -- This message was sent by Atlassian JIRA (v6.2#6252)