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deepsnow

2007-Sep-02 17:27 UTC

what happened to my json?

Hi Gang,

prototype noob here. Im doing something stupid in my code and I need
help solving problem.

The problem occurs when I return some json from a page and try to
evalJSON() it.

string returned from the server looks like this:

{"imageresults":[{"imageid":"0","image_title":"Elk
in the
yard","image_filename":"elk1.jpg","image_caption":""},
{"imageid":"1","image_title":"fasd;lfk","image_filename":"elk1.jpg","image_caption":""},
{"imageid":"2","image_title":"lkjhlkjh","image_filename":"elk1.jpg","image_caption":""},
{"imageid":"3","image_title":"kjhlkjh","image_filename":"elk1.jpg","image_caption":""},
{"imageid":"4","image_title":"kj;lkj","image_filename":"elk1.jpg","image_caption":""}
]}

//without the line breaks


Then, here is my ajax request:

   var request = new Ajax.Request(''getsomedata.php'',
  {
    method:''get'',
    onSuccess: function(transport){var myData
transport.responseText.evalJSON();},
    onFailure: errorOccured
  });

when I ''alert(responseText); without the
''evalJSON()'',  I can see my
json string, however when I use evalJSON() the output turns into
[object][Object].

Any input to help solve this noob problem would be greatly
appreciated.

Mucho thanks,

Deepsnow


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Bastian Feder

2007-Sep-02 18:00 UTC

head link

Re: what happened to my json?

hi,

try:
alert(responseText.imageresults[0].image_title);

this should return> "Elk in the yard"

hope that helps

Bastian


On 9/2/07, deepsnow <daneensign-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>
> Hi Gang,
>
> prototype noob here. Im doing something stupid in my code and I need
> help solving problem.
>
> The problem occurs when I return some json from a page and try to
> evalJSON() it.
>
> string returned from the server looks like this:
>
>
{"imageresults":[{"imageid":"0","image_title":"Elk
in the
>
yard","image_filename":"elk1.jpg","image_caption":""},
>
{"imageid":"1","image_title":"fasd;lfk","image_filename":"elk1.jpg
> ","image_caption":""},
>
{"imageid":"2","image_title":"lkjhlkjh","image_filename":"elk1.jpg
> ","image_caption":""},
>
{"imageid":"3","image_title":"kjhlkjh","image_filename":"elk1.jpg
> ","image_caption":""},
>
{"imageid":"4","image_title":"kj;lkj","image_filename":"elk1.jpg
> ","image_caption":""}
> ]}
>
> //without the line breaks
>
>
> Then, here is my ajax request:
>
>    var request = new Ajax.Request(''getsomedata.php'',
>   {
>     method:''get'',
>     onSuccess: function(transport){var myData >
transport.responseText.evalJSON();},
>     onFailure: errorOccured
>   });
>
> when I ''alert(responseText); without the
''evalJSON()'',  I can see my
> json string, however when I use evalJSON() the output turns into
> [object][Object].
>
> Any input to help solve this noob problem would be greatly
> appreciated.
>
> Mucho thanks,
>
> Deepsnow
>
>
> >
>

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--
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Calvin: Weekends don''t count unless you spend them doing something
completely pointless.

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deepsnow

2007-Sep-02 18:20 UTC

head link

Re: what happened to my json?

Hi Bastian,

It didnt do anything. I believe the problem lies somewhere in
converting the string to a json object.
My understanding is that unless I eval the string that is echo''d from
my php it is still just a string.
I can alert the string as it is, but when I try to run an evalJSON()
on it, I get [object][Object] alerted and no json object to use.

Dane

On Sep 2, 12:00 pm, "Bastian Feder"
<bastian.fe...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> hi,
>
> try:
> alert(responseText.imageresults[0].image_title);
>
> this should return> "Elk in the yard"
>
> hope that helps
>
> Bastian
>
> On 9/2/07, deepsnow
<daneens...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
> > Hi Gang,
>
> > prototype noob here. Im doing something stupid in my code and I need
> > help solving problem.
>
> > The problem occurs when I return some json from a page and try to
> > evalJSON() it.
>
> > string returned from the server looks like this:
>
> >
{"imageresults":[{"imageid":"0","image_title":"Elk
in the
> >
yard","image_filename":"elk1.jpg","image_caption":""},
> >
{"imageid":"1","image_title":"fasd;lfk","image_filename":"elk1.jpg
> > ","image_caption":""},
> >
{"imageid":"2","image_title":"lkjhlkjh","image_filename":"elk1.jpg
> > ","image_caption":""},
> >
{"imageid":"3","image_title":"kjhlkjh","image_filename":"elk1.jpg
> > ","image_caption":""},
> >
{"imageid":"4","image_title":"kj;lkj","image_filename":"elk1.jpg
> > ","image_caption":""}
> > ]}
>
> > //without the line breaks
>
> > Then, here is my ajax request:
>
> >    var request = new Ajax.Request(''getsomedata.php'',
> >   {
> >     method:''get'',
> >     onSuccess: function(transport){var myData > >
transport.responseText.evalJSON();},
> >     onFailure: errorOccured
> >   });
>
> > when I ''alert(responseText); without the
''evalJSON()'',  I can see my
> > json string, however when I use evalJSON() the output turns into
> > [object][Object].
>
> > Any input to help solve this noob problem would be greatly
> > appreciated.
>
> > Mucho thanks,
>
> > Deepsnow
>
> --
> --
> spread the word ... seewww.browsehappy.com;o)
>
> Calvin: Weekends don''t count unless you spend them doing something
> completely pointless.
>
> Join the Greater IBM  Connection
(http://www.xing.com/premiumgroup-6291.d26b7d)

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Bastian Feder

2007-Sep-02 18:37 UTC

head link

Re: what happened to my json?

hi,

trying something other...

If I return JSON from the php I set the HTTP header generated by the
PHP- script to "text/javascript"
This forces prototype to eval the responseText directly as JSON. So
you can treat the response as JSON object ...

so try:

header(''Content-type: text/javascript'');

or:

add:

header("X-JSON: $jsonData");

to your php script, but be aware doing so your data will be
transported via the limited GET method.

hope that helps

Bastian



On 9/2/07, deepsnow <daneensign-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> Hi Bastian,
>
> It didnt do anything. I believe the problem lies somewhere in
> converting the string to a json object.
> My understanding is that unless I eval the string that is echo''d
from
> my php it is still just a string.
> I can alert the string as it is, but when I try to run an evalJSON()
> on it, I get [object][Object] alerted and no json object to use.
>
> Dane
>
> On Sep 2, 12:00 pm, "Bastian Feder"
<bastian.fe...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > hi,
> >
> > try:
> > alert(responseText.imageresults[0].image_title);
> >
> > this should return> "Elk in the yard"
> >
> > hope that helps
> >
> > Bastian
> >
> > On 9/2/07, deepsnow
<daneens...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >
> >
> >
> >
> >
> > > Hi Gang,
> >
> > > prototype noob here. Im doing something stupid in my code and I
need
> > > help solving problem.
> >
> > > The problem occurs when I return some json from a page and try to
> > > evalJSON() it.
> >
> > > string returned from the server looks like this:
> >
> > >
{"imageresults":[{"imageid":"0","image_title":"Elk
in the
> > >
yard","image_filename":"elk1.jpg","image_caption":""},
> > >
{"imageid":"1","image_title":"fasd;lfk","image_filename":"elk1.jpg
> > > ","image_caption":""},
> > >
{"imageid":"2","image_title":"lkjhlkjh","image_filename":"elk1.jpg
> > > ","image_caption":""},
> > >
{"imageid":"3","image_title":"kjhlkjh","image_filename":"elk1.jpg
> > > ","image_caption":""},
> > >
{"imageid":"4","image_title":"kj;lkj","image_filename":"elk1.jpg
> > > ","image_caption":""}
> > > ]}
> >
> > > //without the line breaks
> >
> > > Then, here is my ajax request:
> >
> > >    var request = new
Ajax.Request(''getsomedata.php'',
> > >   {
> > >     method:''get'',
> > >     onSuccess: function(transport){var myData > > >
transport.responseText.evalJSON();},
> > >     onFailure: errorOccured
> > >   });
> >
> > > when I ''alert(responseText); without the
''evalJSON()'',  I can see my
> > > json string, however when I use evalJSON() the output turns into
> > > [object][Object].
> >
> > > Any input to help solve this noob problem would be greatly
> > > appreciated.
> >
> > > Mucho thanks,
> >
> > > Deepsnow
> >
> > --
> > --
> > spread the word ... seewww.browsehappy.com;o)
> >
> > Calvin: Weekends don''t count unless you spend them doing
something
> > completely pointless.
> >
> > Join the Greater IBM  Connection
(http://www.xing.com/premiumgroup-6291.d26b7d)
>
>
> >
>


-- 
--
spread the word ... see  www.browsehappy.com ;o)

Calvin: Weekends don''t count unless you spend them doing something
completely pointless.

Join the Greater IBM  Connection (http://www.xing.com/premiumgroup-6291.d26b7d)

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deepsnow

2007-Sep-02 18:53 UTC

head link

Re: what happened to my json?

Hi Bastian,

I just got it to work. I removed ''json'' as an argument to the
onSuccess function and I used ''.evalJSON();'' on my
responseText.

Before:
onSuccess: function(transport, json){
				var mydata = transport.responseText;
				alert(mydata.imageresults[1].imageid);
				}
After:
onSuccess: function(transport){
				var mydata = transport.responseText.evalJSON();
				alert(mydata.imageresults[1].imageid);
				}

I understood that using the json arg in the anonymous function would
take care of things, but I clearly I misunderstood.
I guess the json arg in the function is meant to signal that the
information coming in has been Header''ed '' as javascript or
JSON,
depending
on which of your suggestions I take. I better go study prototype
more.

Thanks for your help!

Dane


On Sep 2, 12:37 pm, "Bastian Feder"
<bastian.fe...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> hi,
>
> trying something other...
>
> If I return JSON from the php I set the HTTP header generated by the
> PHP- script to "text/javascript"
> This forces prototype to eval the responseText directly as JSON. So
> you can treat the response as JSON object ...
>
> so try:
>
> header(''Content-type: text/javascript'');
>
> or:
>
> add:
>
> header("X-JSON: $jsonData");
>
> to your php script, but be aware doing so your data will be
> transported via the limited GET method.
>
> hope that helps
>
> Bastian
>
> On 9/2/07, deepsnow
<daneens...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
> > Hi Bastian,
>
> > It didnt do anything. I believe the problem lies somewhere in
> > converting the string to a json object.
> > My understanding is that unless I eval the string that is
echo''d from
> > my php it is still just a string.
> > I can alert the string as it is, but when I try to run an evalJSON()
> > on it, I get [object][Object] alerted and no json object to use.
>
> > Dane
>
> > On Sep 2, 12:00 pm, "Bastian Feder"
<bastian.fe...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > hi,
>
> > > try:
> > > alert(responseText.imageresults[0].image_title);
>
> > > this should return> "Elk in the yard"
>
> > > hope that helps
>
> > > Bastian
>
> > > On 9/2/07, deepsnow
<daneens...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > > Hi Gang,
>
> > > > prototype noob here. Im doing something stupid in my code
and I need
> > > > help solving problem.
>
> > > > The problem occurs when I return some json from a page and
try to
> > > > evalJSON() it.
>
> > > > string returned from the server looks like this:
>
> > > >
{"imageresults":[{"imageid":"0","image_title":"Elk
in the
> > > >
yard","image_filename":"elk1.jpg","image_caption":""},
> > > >
{"imageid":"1","image_title":"fasd;lfk","image_filename":"elk1.jpg
> > > > ","image_caption":""},
> > > >
{"imageid":"2","image_title":"lkjhlkjh","image_filename":"elk1.jpg
> > > > ","image_caption":""},
> > > >
{"imageid":"3","image_title":"kjhlkjh","image_filename":"elk1.jpg
> > > > ","image_caption":""},
> > > >
{"imageid":"4","image_title":"kj;lkj","image_filename":"elk1.jpg
> > > > ","image_caption":""}
> > > > ]}
>
> > > > //without the line breaks
>
> > > > Then, here is my ajax request:
>
> > > >    var request = new
Ajax.Request(''getsomedata.php'',
> > > >   {
> > > >     method:''get'',
> > > >     onSuccess: function(transport){var myData > > >
> transport.responseText.evalJSON();},
> > > >     onFailure: errorOccured
> > > >   });
>
> > > > when I ''alert(responseText); without the
''evalJSON()'',  I can see my
> > > > json string, however when I use evalJSON() the output turns
into
> > > > [object][Object].
>
> > > > Any input to help solve this noob problem would be greatly
> > > > appreciated.
>
> > > > Mucho thanks,
>
> > > > Deepsnow
>
> > > --
> > > --
> > > spread the word ... seewww.browsehappy.com;o)
>
> > > Calvin: Weekends don''t count unless you spend them doing
something
> > > completely pointless.
>
> > > Join the Greater IBM  Connection
(http://www.xing.com/premiumgroup-6291.d26b7d)
>
> --
> --
> spread the word ... see  www.browsehappy.com;o)
>
> Calvin: Weekends don''t count unless you spend them doing something
> completely pointless.
>
> Join the Greater IBM  Connection
(http://www.xing.com/premiumgroup-6291.d26b7d)

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Markus Hammer

2007-Sep-03 08:31 UTC

head link

Re: what happened to my json?

i think you misunderstood what json actually is.
if you alert an json evaluated string you''ll get the same as if
you''d
alert javascript objects or functions.


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deepsnow

2007-Sep-04 16:16 UTC

head link

Re: what happened to my json?

Markus,

I understand json =), its the prototype function that was giving me
grief. Specifically the json arg in ''function'', and its
purpose and
requirement to set headers in my php. After removing that arg and
using the evalJSON() method. My data was then correctly being
processed into a js object.

Dane

On Sep 3, 2:31 am, Markus Hammer
<yaya...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> i think you misunderstood what json actually is.
> if you alert an json evaluated string you''ll get the same as if
you''d
> alert javascript objects or functions.

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Rails spinoffs - Sep 2007 - what happened to my json?

what happened to my json?

Re: what happened to my json?

Re: what happened to my json?

Re: what happened to my json?

Re: what happened to my json?

Re: what happened to my json?

Re: what happened to my json?