Hi mjbruder,
The easiest way to do this would be to define the conversion function for
exporting 'stores' as follows:
lambda x: ":".join(str(y) for y in x)
And the conversion function for imports as follows:
lambda x: [db.Key(y) for y in x.split(":")]
-Nick Johnson
On Thu, Sep 10, 2009 at 3:43 PM, mjbruder <[email protected]> wrote:
>
> I'm attempting to use the bulkloader to load data into my app. I have
> my loader/exporter set up with the following classes:
>
> class FoodItemLoader(bulkloader.Loader):
> def __init__(self):
>
> bulkloader.Loader.__init__(self, 'FoodItem',
> [('author', str),
> ('name', str),
> ('brand', str),
> ('price', str),
> ('category', str),
> ('stores', list)
> ])
>
> class FoodItemExporter(bulkloader.Exporter):
> def __init__(self):
> bulkloader.Exporter.__init__(self, 'FoodItem',
> [('author', str, None),
> ('name', str, None),
> ('brand', str, None),
> ('price', str, None),
> ('category', str, None),
> ('stores', list, None),
> ])
>
> exporters = [FoodItemExporter]
> loaders = [FoodItemLoader]
>
> ---
>
> The exporter seems to work fine, and it exports a column with the
> following type of data in it for the stores list property
> "[datastore_types.Key.from_path(u'Store', 3002L,
> _app_id_namespace=u'grocerygeek')]"
>
> Unfortunately, I cannot use this same format to load data into my
> datastore because it gives me the following error "BadValueError:
> Items in the stores list must all be Key instances"
>
> Is there a way I can format my CSV file or my code to accept this type
> of data?
>
> >
>
--
Nick Johnson, Developer Programs Engineer, App Engine
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