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| MtEverest | Hi | 12:57 |
|---|---|---|
| MtEverest | My question is: | 12:57 |
| MtEverest | In a persistent class if I have an attribute which is a simple Python list | 12:58 |
| MtEverest | so any changes made to that list will requirep_changed to be set or not | 12:58 |
| MtEverest | I mean if my class is persistent then everything inside that is automatically persistent or not | 12:59 |
| agroszer | nope, you need to set _p_changed=True | 12:59 |
| agroszer | or use PersistentList | 12:59 |
| agroszer | instead of a simple [] | 12:59 |
| MtEverest | so even if my class is persistent ? | 12:59 |
| agroszer | yes, those are the rules | 13:00 |
| MtEverest | I have seen some weird behavior...some of my lists are persisted and some of them are not | 13:00 |
| agroszer | same goes with a dict or any muteable attribute | 13:00 |
| MtEverest | I mean if my list simply consists of strings then it is perissted if my class is a persistent class | 13:00 |
| agroszer | yeah because if the object itself gets changed, then tada _p_changed is set | 13:00 |
| MtEverest | but if my list consists of some other user defined class instances then it is not | 13:01 |
| agroszer | that's not because of that | 13:01 |
| MtEverest | then ? | 13:01 |
| agroszer | if you set obj.list_attr = [yadayada] | 13:01 |
| agroszer | that sets obj._p_changed = True | 13:01 |
| MtEverest | yes.. but in both the cases I'm using append | 13:02 |
| agroszer | if you do obj.list_attr.append() | 13:02 |
| agroszer | that won't set _p_changed | 13:02 |
| agroszer | that's how it works | 13:02 |
| MtEverest | but if obj is persistent it should copy the whole object again | 13:02 |
| agroszer | use simply PersistentList and be done with it | 13:03 |
| MtEverest | that is what storage unit section in zodb wikipedia pge says | 13:03 |
| MtEverest | every object whose class derives from Persistent is the atomic unit of storage (the whole object is copied to the storage when a field is modified). | 13:03 |
| agroszer | http://www.zodb.org/en/latest/documentation/articles/ZODB1.html#detecting-changes | 13:07 |
| agroszer | http://www.zodb.org/en/latest/documentation/articles/ZODB1.html#mutable-attributes | 13:07 |
| agroszer | use just PersistentList and be done with it | 13:08 |
| agroszer | persistent.list.PersistentList it is | 13:08 |
| MtEverest | ok, I defined a repoze index on one of the lists and that index doesn't work with persistent objects, I guess.. | 13:09 |
| MtEverest | Anyway will change everything and have a relook on this | 13:09 |
| MtEverest | thanks agroszer | 13:09 |
| agroszer | persistent/non persistent should not be an issue, unless the index looks up the class | 13:10 |
| agroszer | because | 13:11 |
| agroszer | class PersistentList(UserList, persistent.Persistent): | 13:11 |
| MtEverest | ok, will retry | 13:11 |
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| J1m | Gaaa, the ZEO stoage server code is just so needlessly inflexible. | 20:32 |
| J1m | I'm so sick of writing ZEO tests with multiple processes cuz the storage server can't run in a fricking thread. | 20:33 |
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| aclark | J1m: who wrote it? | 21:52 |
| J1m | I'd rather not name names. | 21:52 |
| aclark | heh | 21:56 |
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