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

Tom Trenka ttrenka at gmail.com
Fri Sep 12 11:20:11 EDT 2008


Going off memory, I want to say that in my case it was because the first
call was fetchByIdentity, and not the fetch methods themselves. But I'd have
to go digging for it.
trt

On Fri, Sep 12, 2008 at 10:04 AM, Jared Jurkiewicz <
jared.jurkiewicz at gmail.com> wrote:

>  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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