If you want to remove one item from the fetched list then somelist = theObject.subCategories.fetch(1000) somelist.remove(anotherObject) will not work because the 'anotherObject' is another python representation of the object in the datastore, fetch creates NEW instances for the objects it retrieves. Thus the remove will not work. somelist = [theObject.subCategories] will result in a list which has as its first element a Query object. somelist = theObject.subCategories.fetch(1000) already returns a list with object instance.
2008/10/20 Alex Vartan <[EMAIL PROTECTED]>: > > get will only return a single object as far as I know. I want to fetch > all of them. So must I use > somelist = theObject.subCategories.fetch() > or will somelist = [theObject.subCategories] work as well, explicitly > assigning somelist as a list. > > On Oct 20, 9:33 am, djidjadji <[EMAIL PROTECTED]> wrote: >> This should work, use get() from the Query object >> >> somelist = theObject.subCategories.get() >> somelist.remove(anotherObject) >> >> 2008/10/20 Alex Vartan <[EMAIL PROTECTED]>: >> >> >> >> > Hi, >> >> > Simple question, but want to make sure I get this right. The docs say: >> >> > "collection_name is the name of the property to give to the referenced >> > model class whose value is a Query for all entities that reference the >> > entity. If no collection_name is set, then modelname_set (with the >> > name of the model in lowercase letters and "_set" added) is used." >> >> > I've got code that reads like this in one of my classes: >> >> > parentCategory = >> > db.SelfReferenceProperty(collection_name='subCategories') >> >> > Then I need to make a copy of the resulting list, but remove an item >> > for temporary processing: >> >> > somelist = theObject.subCategories >> > somelist.remove(anotherObject) >> >> > WIll this work, without having to call a fetch? Since the docs make it >> > seem like "theObject.subCategories" is actually an object of type >> > Query. >> > Thanks, >> > Alex > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
