<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> I just used the Morph implementation of that pattern just as an example. A couple of emails ago you said "I need to search for a parent object". Then, if each object knows its parent, then the same pattern can be used, just calling then "parent" instead of owner. This is, iterating parents without building collections. This is useful only if your objects also form a tree structure where every object knows its parent in the tree. Apologies for not studying your model in detail. Haven't found the time for that, and so I can only suggest ideas to consider and possibly discard. HTH, On 7/3/2023 10:30 AM, Hilaire Fernandes via Cuis-dev wrote: <blockquote cite="mid:d046997c-e9d1-e668-c340-c4d2aaca1b4e@free.fr" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> If I understand correctly what you mean, my situation is a bit different as my business objects do not know about their direct owner. My objects are model not morph. Hilaire <div class="moz-cite-prefix">Le 03/07/2023 à 14:28, Juan Vuletich a écrit : </div> <blockquote type="cite" cite="mid:64A2BEF1.7000700@cuis.st">If you're just looking for a parent object (as you mentioned in another email), you don't need to build the collection at all. See #firstOwnerSuchThat: that ends doing #withAllOwnersDo: . This is how we do that kind of search in Morphic. </blockquote> <pre class="moz-signature" cols="72">-- GNU Dr. Geo <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://drgeo.eu">http://drgeo.eu</a> <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://blog.drgeo.eu">http://blog.drgeo.eu</a></pre> </blockquote> <pre class="moz-signature" cols="72">-- Juan Vuletich cuis.st github.com/jvuletich researchgate.net/profile/Juan-Vuletich independent.academia.edu/JuanVuletich patents.justia.com/inventor/juan-manuel-vuletich linkedin.com/in/juan-vuletich-75611b3 twitter.com/JuanVuletich</pre> </body> </html>