[google-appengine] Re: Disappearing reference collections
It appears as if this is occurring when I'm not importing the Comment model. This might be mentioned in the docs, but I've been developing with GAE for a while and didn't know that it was necessary to import the model of the referred entity kind. On Feb 1, 2:23 am, James wrote: > Let's use a simple example of a model containing posts and comments. > The comment model contains a ReferenceProperty to Post, with a > "comments" collection name. > > It always works fine locally: > > # Let's build a query object: > from model import Post > p = Post.all().get() > p.comments>> > > # Now we can fetch a list of comment entities. > > Sometimes, it works correctly on production. But sometimes, this > happens: > > # Let's build a query object: > from model import Post > p = Post.all().get() > p.comments > > >> AttributeError: 'Post' object has no attribute 'comments' > > And this is for entities where I've double and triple checked the > model and the existence of the reference data. This problem didn't > exist for me unitl a few days ago, either. > > I suspect this could be an index.yaml issue, but I use the - > require_indexes dev_appserver param, and I've double-checked my index. > > Please, please do suggest something if you know the answer. This is a > nasty bug, and I have no idea where it's coming from. --~--~-~--~~~---~--~~ 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 google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~--~~~~--~~--~--~---
[google-appengine] Re: Disappearing reference collections
On Feb 2, 12:15 pm, James wrote: > It appears as if this is occurring when I'm not importing the Comment > model. This might be mentioned in the docs, but I've been developing > with GAE for a while and didn't know that it was necessary to import > the model of the referred entity kind. > The Comment class actually creates the Post.comments attribute behind the scenes. Check the ReferenceProperty.__property_config__() method for implementation details. I agree however that this fact should have been documented. --~--~-~--~~~---~--~~ 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 google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~--~~~~--~~--~--~---
[google-appengine] Re: Disappearing reference collections
Thanks for the tip. I've been meaning for some relevant opportunities to look more into the internals. On Feb 1, 6:17 pm, Alexander Kojevnikov wrote: > On Feb 2, 12:15 pm, James wrote:> It appears as if > this is occurring when I'm not importing the Comment > > model. This might be mentioned in the docs, but I've been developing > > with GAE for a while and didn't know that it was necessary to import > > the model of the referred entity kind. > > The Comment class actually creates the Post.comments attribute behind > the scenes. Check the ReferenceProperty.__property_config__() method > for implementation details. > > I agree however that this fact should have been documented. --~--~-~--~~~---~--~~ 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 google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~--~~~~--~~--~--~---
