[dojo-contributors] ItemFileReadStore question -- Anyone see why this wouldnt work? I'm stumpped...

Jared Jurkiewicz jared.jurkiewicz at gmail.com
Fri Sep 12 11:04:09 EDT 2008


  Query doesn't call _forceLoad().   Query checks the state to see if
data has yet been populated and loads it if it has not.  _forceLoad()
was introducted to deal with things like newItem(), and the like.
Given you cannot officially have references to any items without
invoking a query in the first place, I don't see where the problem is.
  If you're going to internal structures to get items and bypassing a
query, then you're completely violating the dojo.data API to begin
with and all bets are off.

   What I don't understand is why any of you would need to call
_forceLoad() if you're using the dojo.data API by spec.   Can you
clarify exactly why you had to resort to it?

-- Jared Jurkiewicz.



On Thu, Sep 11, 2008 at 4:26 PM, Tom Trenka <ttrenka at gmail.com> wrote:
> Jared--
> Can you make this really clear somewhere in the documentation?  I ran into
> this exact same issue with a previous client project and did what Karl did:
> resort to _forceLoad (just remembering this now).
> (I also seem to remember a query *not* doing that but this was against 0.9
> IIRC.)
> regards,
> trt
>
> On Thu, Sep 11, 2008 at 2:37 PM, Jared Jurkiewicz
> <jared.jurkiewicz at gmail.com> wrote:
>>
>>     As with data obtained from URLs, the data objects are not parsed
>> or inserted into any arras until the first actual query via fetch(),
>> fetchItemByIdentity, etc.   Effectively it doesn't waste time parsing
>> anything until it actually needs to.
>>
>> -- Jared
>>
>>
>> On Thu, Sep 11, 2008 at 3:14 PM, Karl Tiedt <ktiedt at gmail.com> wrote:
>> > Sorry for the wasted email everyone, I figured it out finally...
>> >
>> > when loading data from a JSON var... _forceLoad() must be called (if not
>> > connected to a widget) is what I've found... otherwise the widget does
>> > it
>> > for you. I was merely trying to validate my data format... any attempt
>> > to
>> > access data (fetch or query) sounds like it should force the laod as
>> > well as
>> > far as that goes... was just a tad disconcerting to keep seeing 0 length
>> > data arrays coming up :/
>> >
>> > -Karl Tiedt
>> >
>> >
>> > On Thu, Sep 11, 2008 at 1:50 PM, Karl Tiedt <ktiedt at gmail.com> wrote:
>> >>
>> >> I have the following JSON:
>> >>
>> >> {
>> >>      "identifier": "uuid",
>> >>      "items": [
>> >>              {
>> >>                      "Power State": "On",
>> >>                      "Boot Time": "2008-08-30T23:50:06.028558-04:00",
>> >>
>> >>
>> >>                      "Host Name": "poweredOn",
>> >>                      "IP Address": "2008-08-30T23:50:06.028558-04:00",
>> >>                      "Name": "New Virtual Machine",
>> >>                      "Operating System": "Microsoft Windows Server
>> >> 2003, Standard Edition
>> >> (32-bit)",
>> >>
>> >>
>> >>                      "uuid": "564dd5b0-b887-4041-bcfe-4896e6040547"
>> >>              },
>> >>              {
>> >>                      "Power State": "On",
>> >>                      "Boot Time": "2008-08-20T02:15:57.63562-04:00",
>> >>                      "Host Name": "sergey-8227caed.",
>> >>
>> >>
>> >>                      "IP Address": "192.168.1.51",
>> >>                      "Name": "Foo",
>> >>                      "Operating System": "Microsoft Windows XP
>> >> Professional (32-bit)",
>> >>
>> >>
>> >>                      "uuid": "564d36e4-6cea-e0e8-5216-3766ef2a3bd0"
>> >>              }
>> >>      ],
>> >>      "label":
>> >>
>> >> And I am trying to create a store from it...
>> >> test = new dojo.data.ItemFileReadStore({'data': varName});
>> >>
>> >> and it always comes back with 0 items... I've tried adding 'label':
>> >> 'Name'
>> >> and 'identifier':'uuid' to the JSON object but... neither made a
>> >> difference... I've tried replacing the spaces in the property names and
>> >> removing the -'s from the uuid....
>> >>
>> >> Stumped :(
>> >>
>> >> -Karl Tiedt
>> >
>> >
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