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| tlotze | Hi. | 13:58 |
|---|---|---|
| tlotze | I've a question on zope.app.container. | 13:59 |
| tlotze | In the doc tests of of zope.app.container.contained.setitem, it says that a container sets an item's __parent__ and __name__ and fires events unless the __parent__ and __name__ have already been set. | 14:00 |
| tlotze | What's supposed to happen if the values are inconsistent, i.e. I do some_container["foo"] = bar where bar.__parent__ == other_container and bar.__name__ == "baz"? | 14:01 |
| tlotze | In particular, what is supposed to happen if I add an item to a container twice, under different names? | 14:01 |
| tlotze | Currently the values on the item are silently overwritten, but this doesn't feel like a good idea, and in any case it seems like an under-specified spot. | 14:02 |
| mgedmin | I agree that it is horrifyingly underspecified | 14:04 |
| mgedmin | however I have found the behaviour useful | 14:04 |
| mgedmin | when you want to replace the container type with something else | 14:05 |
| mgedmin | you can do | 14:05 |
| mgedmin | new_container = MyContainerType() | 14:05 |
| mgedmin | for key, value in old_container.items(): new_container[key] = value | 14:05 |
| mgedmin | del old_container | 14:05 |
| tlotze | right | 14:05 |
| mgedmin | actually, I take the "horrifyingly underspecified" bit back | 14:06 |
| tlotze | I wondered about all this in a similar case; in a zodb evolution, we rename an item: x["new name"] = x["old_name"]; del x["old_name"] | 14:06 |
| mgedmin | the Pythonic thing is that code should be obvious and should not require the reading of documentation to understand what it does | 14:06 |
| mgedmin | tlotze: the best thing to do is to write a test | 14:07 |
| tlotze | sure | 14:07 |
| mgedmin | or at least add assert x["new name"].__name__ == "new name" and x["new name"].__parent__ is x | 14:07 |
| mgedmin | to the generation script itself | 14:07 |
| mgedmin | but a unit test is better | 14:07 |
| tlotze | I just wonder what happens if one doesn't use this "feature" like in our two examples, but adds the same object twice. That silently leads to inconsistencies. | 14:07 |
| mgedmin | then when someone decides the current behaviour is a bug and merges the "bugfix" into the release branch, you'll notice | 14:08 |
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| fcorrea | Hi srs, quick q about views as actions of forms. I have a view called searchResults.html. I am trying to set this in my form like this tal:attributes="action context/@@searchResults.html" but I am getting a Bus error here. Am I missing something? | 22:23 |
| Theuni | yup | 22:23 |
| fcorrea | BTW-If I hard code the action="@@searchResults.html" it works | 22:23 |
| Theuni | you don't want the view there, but the URL to the view | 22:23 |
| fcorrea | mm....strange | 22:23 |
| Theuni | context/@@searchResults.html *renders* the view, not determine it's url | 22:24 |
| fcorrea | the view is registered to * | 22:24 |
| fcorrea | ah | 22:24 |
| Theuni | just doing @@searchResults.html should be fine though | 22:24 |
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| philiKON | fcorrea, string:${context/absolute_url}/@@searchResults.html | 22:25 |
| fcorrea | ok. Thanks. I thought the best way to do it was using TAL, but that's ok | 22:25 |
| philiKON | if you want to be absolutely sure | 22:25 |
| fcorrea | mmm | 22:25 |
| fcorrea | philiKON: better one ;) | 22:25 |
| philiKON | fcorrea, string:${context/@@absolute_url}/@@searchResults.html even | 22:25 |
| fcorrea | thanks | 22:25 |
| fcorrea | Theuni, philiKON Thank you guys | 22:26 |
| Theuni | np | 22:29 |
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