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| 14:31.56 | jdobrien | When accessing a property which is a reference set, what's the best way to create the referenced object automatically when it's accessed? |
| 14:32.33 | jdobrien | s/reference set/reference |
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| 14:42.51 | jdobrien | niemeyer, radix...is this possible ^^ |
| 14:43.07 | radix | jdobrien: I don't understand |
| 14:43.15 | radix | if it's a reference, when you access it, it'll give you an object |
| 14:43.22 | radix | representing the referenced object |
| 14:43.45 | jdobrien | hmm |
| 14:44.16 | jamesh | If you want "create object if it doesn't already exist" behaviour, I'd use a method rather than hiding it behind attribute access. |
| 14:44.31 | radix | oh |
| 14:44.35 | jdobrien | jamesh: hmm |
| 14:44.44 | jdobrien | jamesh: that's kind of the point of hiding it |
| 14:45.03 | radix | or, create the object when the parent object is constructed |
| 14:45.13 | jdobrien | radix: that's a good idea |
| 14:45.19 | jamesh | e.g "bar = foo.ensure_bar()" instead of "bar = foo.bar" |
| 14:45.50 | jamesh | that'd be good too if you always want the pair of objects. |
| 14:46.35 | jdobrien | jamesh: we do |
| 14:47.24 | jdobrien | jamesh: currently I am using properties to do what your saying...but it's ugly |
| 14:47.55 | jdobrien | you're |
| 14:47.58 | jamesh | then the constructor seems like a good place to do so. E.g. in Launchpad, the factory function used to create a project also creates the associated default release series |
| 14:48.20 | jamesh | if you want lazy creation, then I'd go for a method. |
| 14:48.46 | jdobrien | jamesh: this is the user profile stuff for our project...I want to use properties because eventually we'll combine the stuff in the db and I don't want to change the code that references them |
| 14:49.33 | jdobrien | jamesh, radix: thanks for the help |
| 14:50.43 | jamesh | jdobrien: well, unless lazy creation is something you need, I'd go with the simple solution of creating the linked object in the constructor. |
| 14:51.09 | jdobrien | jamesh: yep...doing it now...no need for laziness when it will eventually happen |
| 14:51.17 | jamesh | jdobrien: if you want to proxy certain attributes from one to the other, take a look at storm.references.Proxy() |
| 14:51.25 | jdobrien | oooh |
| 14:51.34 | jdobrien | that sounds intreaguing |
| 14:51.48 | jdobrien | intriguing even |
| 14:52.36 | jdobrien | jamesh: thank you! |
| 14:53.30 | jdobrien | I'm glad I asked...I figured there had to be a more elegant solution |
| 14:53.49 | jamesh | niemeyer: if you have a chance to look at the compile_python question I posted to the list, that'd be great. I ran into a few cases where ResultSet.set() failed due to the current limitations. |
| 14:54.10 | jamesh | jdobrien: Storm even knows how to handle proxy attributes in expressions. |
| 14:54.18 | jdobrien | wonderful |
| 14:54.44 | niemeyer | jamesh: I've read it, but haven't had time to really get into it since this week is being a little heavier than usual, but I have it in mind and will get back to you very soon |
| 14:56.18 | jamesh | niemeyer: thanks. |
| 14:57.19 | niemeyer | jamesh: You're welcome, and sorry for the delay |
| 15:12.23 | jdobrien | jamesh: I can't figure why i am getting this error Reference used in an unknown class |
| 15:16.34 | jamesh | jdobrien: one of the classes involved in the reference isn't a storm class? |
| 15:16.53 | jdobrien | jamesh: do they need to inherit from Storm? |
| 15:17.55 | jamesh | jdobrien: shouldn't need to |
| 15:19.02 | jdobrien | i think i found the problem |
| 15:19.30 | jdobrien | yep |
| 15:19.38 | jdobrien | forgot to delete one of my old properties |
| 15:19.53 | jdobrien | that Proxy is exactly what i was looking for |
| 15:21.28 | jdobrien | jamesh: do you recall, can a user have multiple records in django_openid_auth_useropenid |
| 15:22.00 | jamesh | jdobrien: yes, but I don't think we expose a way to cause that to happen |
| 15:22.49 | jdobrien | jamesh: but it would be a breakage I assume if the reference(...on_remote=True) had multiple records I assume |
| 15:24.28 | jamesh | jdobrien: we could add a unique index if we wanted to make sure we don't get more than one. |
| 15:25.39 | jdobrien | jamesh: i would think it might depend on how we handle things with the SSO too |
| 15:26.13 | jdobrien | jamesh: but this is beyond a #storm conversation :-) |
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| 21:54.40 | thumper | is there ahy w |
| 21:54.57 | thumper | I mean... |
| 21:55.17 | thumper | is there any way to specify that a particular field should be re-read automagically from the DB on updates? |
| 21:55.36 | thumper | I know about storm.locals.AutoReload |
| 21:55.43 | thumper | but you have to assign that to a field |
| 21:58.06 | radix | thumper: not sure what you mean |
| 21:58.23 | radix | maybe you want field = Int(default=AutoReload) # or whatever |
| 21:58.30 | thumper | radix: I have a field for an object that is updated by a before update or insert |
| 21:58.43 | radix | oh, a trigger? |
| 21:58.45 | thumper | radix: when I update "name" say, this field gets updated |
| 21:58.58 | thumper | radix: db trigger |
| 21:59.03 | radix | right ok |
| 21:59.20 | radix | I guess when you change the name attribute you should set that field to AutoReload at the same time |
| 21:59.32 | thumper | hmm... |
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