[Grok-dev] How do I look up a grok.Indexes utility so I can call methods on an index?

[Souheil CHELFOUH]

grok Indexes are used only at the application creation.
What it does is :

- lookup for the catalog or create it if it's not found
zope.catalog.interfaces.ICatalog

- List the indexes registered for the application (grok.site(...)) and
create the indexes inside the catalog found or newly created

you need simply to query your catalog (created only if you have a
grok.Indexes registered before you create the app) with :
queryUtility(ICatalog)  (unnamed it is)

and work with the returned object

2010/8/25 Sebastian Ware <sebastian at urbantalk.se>:
> That is the route I have been trying, but I am at a loss as to what interface to look up the catalog with. I can't find what grok.Indexes implements. I have been trying different versions of:
>
>   getUtility( ???, 'content_index')
>
> Mvh Sebastian
>
>
> 25 aug 2010 kl. 15.18 skrev Souheil CHELFOUH:
>
>> the index is in the catalog itself.
>> get the catalog, the stored values are the indexes which, themselves,
>> store the values needed for the indexation.
>>
>>
>> 2010/8/25 Sebastian Ware <sebastian at urbantalk.se>:
>>> I have a value index from zc.catalog and I want to use the implemented sort method. However, I don't understand how to look up the actual index. The index is defined as:
>>>
>>> class SitePublishCatalog(grok.Indexes):
>>>    grok.site(Testvalueindex)
>>>    grok.context(IPublished)
>>>    grok.name('content_index')
>>>
>>>    published = Value()
>>>
>>> I want to be able to do call index.sort(res) on my results that come from hurry.query, in the way explained in the zc.catalog doctest.
>>>
>>> """
>>> Sorting
>>> -------
>>>
>>> Value indexes supports sorting, just like zope.index.field.FieldIndex.
>>>
>>>    >>> index.clear()
>>>
>>>    >>> index.index_doc(1, 9)
>>>    >>> index.index_doc(2, 8)
>>>    >>> index.index_doc(3, 7)
>>>    >>> index.index_doc(4, 6)
>>>    >>> index.index_doc(5, 5)
>>>    >>> index.index_doc(6, 4)
>>>    >>> index.index_doc(7, 3)
>>>    >>> index.index_doc(8, 2)
>>>    >>> index.index_doc(9, 1)
>>>
>>>    >>> list(index.sort([4, 2, 9, 7, 3, 1, 5]))
>>>    [9, 7, 5, 4, 3, 2, 1]
>>> """
>>>
>>> Mvh Sebastian
>>>
>>>
>>>
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>>>
>
>