<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> 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 class="moz-txt-link-freetext" href="http://drgeo.eu">http://drgeo.eu</a> <a class="moz-txt-link-freetext" href="http://blog.drgeo.eu">http://blog.drgeo.eu</a></pre> </body> </html>