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| nfre | anybody familiar with zodb? | 14:45 |
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| kindkid7 | Is there a way to iterate through the elements in a ZCatalog index, starting from a certain offset? (ie - for "paging" results) | 18:23 |
| sm | kindkid7: there surely is, if we could remember it. Have you found some api docs ? | 18:28 |
| sm | not seeing it at http://143.106.9.7/Control_Panel/Products/ZCatalog/Help/ZCatalog.py , oh well | 18:30 |
| kindkid7 | looks like I can do what I want with a query like: (index_name_goes_here={'query':'some_value', 'range':'min'}), and then just stop iterating early once I have enough for one page | 18:32 |
| kindkid7 | and remember which value I left off at for the next page | 18:33 |
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| kindkid7 | oh, but I guess I'll need to make sure it's yielding the elements in the same order as the index | 18:35 |
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| supton | kindkid7: so catalog results are lazy sequences. you can just slice them, and they only fetch up to what you need. | 20:33 |
| supton | kindkid7: just use or write a batching implementation based on sequence slicing, and you will have something that works -- only fetching and constructing catalog brains for metadata objects for your slice/batch. The LazyMap sequence otherwise just stores a '_seq' attribute with a list of integer record ids, only getting brains using __getitem__() on demand. | 20:35 |
| supton | sort of like an iterator, but not quite the same | 20:36 |
| kindkid7 | cool, thanks | 20:43 |
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