Documentation:Derived settable associations: Difference between revisions

Derived settable associations

Revision as of 06:32, 13 March 2023

Derived attributes & associations are read-only, but you can also have writable associations that update other attributes or links when they themselves are set. Read here about how that works on attributes: Derived settable attributes.

OCL for reading Class2selection

self.Class2

EAL for the writing Class2Selection

self.Class2 := vInputParameter;
self.SelectionLog := self.SelectionLog + DateTime.Now.asString + ': '+ vInputParameter.Name + '\r\n'

The most common use case for this is to execute "extra" code for recalculating other persisted values based on the new value of a change to a link.

Here is the sample model to be loaded into the designer: File:DerivedSettableExample.modlr

This page was edited 97 days ago on 02/10/2024. What links here

Revision as of 08:25, 12 December 2022 (view source) Stephanie Namugambe (talk \| contribs) No edit summary Tag: Visual edit ← Older edit		Revision as of 06:32, 13 March 2023 (view source) Stephanie Namugambe (talk \| contribs) No edit summary Tag: Visual edit Newer edit →
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	[[Derived attributes & associations]] are read-only, but you can also have writable associations that update other attributes or links when they are ~~themselves~~ set. Read here [[Derived settable attributes]] ~~about how that works on attributes~~.		[[Derived attributes & associations]] are read-only, but you can also have writable associations that update other attributes or links when they themselves are set. Read here about how that works on attributes: [[Derived settable attributes]].
	[[File:Derived settable class example.png\|none\|thumb\|531x531px]]		[[File:Derived settable class example.png\|none\|thumb\|531x531px]]