That did it ! See what i mean about something obvious? Thanks very much for your help on this. You have been a terrific, and patient teacher.
sk On Dec 14, 3:48 am, Frederick Cheung <[email protected]> wrote: > On 14 Dec 2011, at 09:12, skrite <[email protected]> wrote: > > > OK, i did try your example and the circles disappear, but never > > update. Then, nothing. there are no errors in the inspect element of > > chrome under the console, nothing updates, it just kinda freezes > > there. I can see the queries being pulled in the webrick server logs. > > a prettier image of the code is herehttp://pastie.org/3014696 > > (also more complete). > > Because you've called the parameter that is passed to you Ajax callback > 'response', you need response.responseJSON not request.responseJSON > Stick a breakpoint in there to investigate further > Fred > > > > > > > > > I know i am fumbling over something obvious here, but just cannot seem > > to work it out. > > > when i use the request address update_mapv3_circles in a browser, this > > is the response > > [["35.931341","-102.32205",381.75,287.4,"AL","AL", > > 557,"#7F7F7F","#FF0000",287.8,287.6,"AL<br>0 psi",0], > > ["35.88125039","-102.3088989",525.0,83.4,"DC","DC", > > 34280,"#7F7F7F","#FF0000",83.6,83.1,"DC<br>0 psi",0], > > ["35.88125039","-102.3226989",525.0,81.7,"DC2","DC2", > > 37241,"#000000","#FF0000",81.7,81.7,"DC2<br>0 psi",0], > > ["35.92361","-102.308768",534.75,74.8,"J1","J1", > > 559,"#7F7F7F","#FF0000",74.6,74.5,"J1<br>0 psi",0], > > ["35.92332","-102.32096",493.5,261.0,"J2","J2",560,"#7F7F7F","#FF0000", > > 261.0,261.0,"J2<br>0 psi",0],["35.931354","-102.31308", > > 397.5,82.1,"SL1","SL1",561,"#7F7F7F","#FF0000",80.9,81.9,"SL1<br>0 > > psi",0],["35.931186","-102.304202",390.0,165.4,"SL2","SL2", > > 110823130,"#7F7F7F","#FF0000",165.5,165.6,"SL2<br>0 psi",0], > > ["35.938729","-102.29968",397.5,89.3,"SL4","SL4", > > 563,"#7F7F7F","#FF0000",89.3,89.3,"SL4<br>0 psi",0], > > ["35.931301","-102.29965",397.5,23.4,"SL5","SL5", > > 564,"#7F7F7F","#FF0000",23.0,23.4,"SL5<br>0 psi",0], > > ["35.924694","-102.299034",333.75,95.8,"SL6","SL6", > > 7882,"#7F7F7F","#FF0000",95.8,95.8,"SL6<br>0 psi",0]] > > > in the view source of the website where <%= @mapped_sites.to_json %> > > is , i have this > > var sites = [["35.931341","-102.32205",381.75,287.4,"AL","AL", > > 557,"#7F7F7F","#FF0000",287.8,287.6,"AL<br>0 psi",0], > > ["35.88125039","-102.3088989",525.0,83.4,"DC","DC", > > 34280,"#7F7F7F","#FF0000",83.6,83.1,"DC<br>0 psi",0], > > ["35.88125039","-102.3226989",525.0,81.7,"DC2","DC2", > > 37241,"#000000","#FF0000",81.7,81.7,"DC2<br>0 psi",0], > > ["35.92361","-102.308768",534.75,74.8,"J1","J1", > > 559,"#7F7F7F","#FF0000",74.6,74.5,"J1<br>0 psi",0], > > ["35.92332","-102.32096",493.5,261.0,"J2","J2",560,"#7F7F7F","#FF0000", > > 261.0,261.0,"J2<br>0 psi",0],["35.931354","-102.31308", > > 397.5,82.1,"SL1","SL1",561,"#7F7F7F","#FF0000",80.9,81.9,"SL1<br>0 > > psi",0],["35.931186","-102.304202",390.0,165.4,"SL2","SL2", > > 110823130,"#7F7F7F","#FF0000",165.5,165.6,"SL2<br>0 psi",0], > > ["35.938729","-102.29968",397.5,89.3,"SL4","SL4", > > 563,"#7F7F7F","#FF0000",89.3,89.3,"SL4<br>0 psi",0], > > ["35.931301","-102.29965",397.5,23.4,"SL5","SL5", > > 564,"#7F7F7F","#FF0000",23.0,23.4,"SL5<br>0 psi",0], > > ["35.924694","-102.299034",333.75,95.8,"SL6","SL6", > > 7882,"#7F7F7F","#FF0000",95.8,95.8,"SL6<br>0 psi",0]]; > > > Anyway, thanks for all of your help so far, this is at least less > > baffling to me than it was a couple of days ago. > > > sk > > > On Dec 14, 2:52 am, Frederick Cheung <[email protected]> > > wrote: > >> On 14 Dec 2011, at 05:47, skrite <[email protected]> wrote: > > >>> ok, even though the @mapped_sites.to_json works, the output of that > >>> does not look like json. It looks like an array > > >> If my memory is correct, that's valid json too ( as are most literals). > >> It's common for the top level thing to be an object rather than an array, > >> but not mandatory. Since the thing you called to_json on was an array, you > >> got the json representation of an array back. > > >> To get the non text version of the response, like I said earlier look at > >> response.responseJSON > > >> Fred > > >>> example: > > >>> var sites = [["35.931341","-102.32205",381.75,288.0,"AL","AL", > >>> 557,"#7F7F7F","#FF0000",287.1,288.3,"AL<br>0 psi",0], > >>> ["35.88125039","-102.3088989",525.0,83.4,"DC","DC", > >>> 34280,"#7F7F7F","#FF0000",83.1,83.3,"DC<br>0 psi",0], > >>> ["35.88125039","-102.3226989",525.0,81.7,"DC2","DC2", > >>> 37241,"#000000","#FF0000",81.7,81.7,"DC2<br>0 psi",0], > >>> ["35.92361","-102.308768",534.75,73.7,"J1","J1", > >>> 559,"#7F7F7F","#FF0000",74.7,73.8,"J1<br>0 psi",0], > >>> ["35.92332","-102.32096",493.5,261.0,"J2","J2",560,"#7F7F7F","#FF0000", > >>> 261.0,261.0,"J2<br>0 psi",0],["35.931354","-102.31308", > >>> 397.5,80.8,"SL1","SL1",561,"#7F7F7F","#FF0000",81.3,81.9,"SL1<br>0 > >>> psi",0],["35.931186","-102.304202",390.0,165.2,"SL2","SL2", > >>> 110823130,"#7F7F7F","#FF0000",165.4,165.6,"SL2<br>0 psi",0], > >>> ["35.938729","-102.29968",397.5,89.3,"SL4","SL4", > >>> 563,"#7F7F7F","#FF0000",89.3,89.3,"SL4<br>0 psi",0], > >>> ["35.931301","-102.29965",397.5,23.7,"SL5","SL5", > >>> 564,"#7F7F7F","#FF0000",23.9,23.0,"SL5<br>0 psi",0], > >>> ["35.924694","-102.299034",333.75,95.8,"SL6","SL6", > >>> 7882,"#7F7F7F","#FF0000",95.8,95.8,"SL6<br>0 psi",0]]; > > >>> and the code seems to work with it like an array. How do i get the > >>> responseText from the server as an array? > > >>> thanks again. > > >>> sk > > >>> On Dec 13, 4:08 pm, Frederick Cheung <[email protected]> > >>> wrote: > >>>> On 13 Dec 2011, at 19:54, skrite <[email protected]> wrote: > > >>>>> Jim. > > >>>>> You are correct, when i show typeof(sites) from when sites = <%= > >>>>> @mapped_sites => > >>>>> i get object > >>>>> when i do typeof(sites) after getting sites from the > >>>>> url_that_returns_json > >>>>> i get string > > >>>> responseText is always going to be text if I remember how prototype > >>>> handles thing (the text will just happen to be the string representation > >>>> of the json). > >>>> If the response content-type was set correctly then > >>>> response.responseJson (or something like that) should be populated > > >>>> Fred > > >>>>> i suppose that i am not getting returned correctly. > >>>>> if i look at the source of @mapped_sites > >>>>> and from the browser look at url_that_returns_json, > >>>>> they are identical. > > >>>>> thanks for your help, again. > >>>>> I have learned a lot the last couple of days :) > > >>>>> On Dec 12, 6:22 pm, Jim Ruther Nill <[email protected]> wrote: > >>>>>> On Tue, Dec 13, 2011 at 6:08 AM, skrite <[email protected]> wrote: > >>>>>>> I am doing something similar here. The website is built on rails 2.3.9 > >>>>>>> and > >>>>>>> uses prototype. > > >>>>>>> Almost all of what i need to happen does, but i get to the point where > >>>>>>> the update happens and nothing does. > > >>>>>>> // add circles to map as it initializes > >>>>>>> addCircles(sites, map, markerArray, lineArray); > > >>>>>>> var pe = new > >>>>>>> PeriodicalExecuter(refreshCircleMarkers.curry(markerArray, > >>>>>>> lineArray, map), 33); > > >>>>>>> function refreshCircleMarkers(markerArray, lineArray, map) { > >>>>>>> // first we remove the existing markers in place > >>>>>>> for(i=0; i<markerArray.length; i++) { > >>>>>>> markerArray[i].setMap(null); > >>>>>>> } > > >>>>>> // and empty the array itself> markerArray = []; > > >>>>>>> var url = "/group/update_mapv3_circles"; > >>>>>>> new Ajax.Request(url, { > >>>>>>> method: 'get', > >>>>>>> onSuccess: function(response) { > >>>>>>> var sites = response.responseText; > >>>>>>> addCircles(sites, map, markerArray, lineArray); > >>>>>>> } > >>>>>>> }); > > >>>>>> I see nothing wrong. Does the addCircles function expect a JSON > >>>>>> object for the first param? The only reason I can think why this isn't > >>>>>> working > >>>>>> is a type mismatch. > > >>>>>>> If i do an alert(response.responseText) the alert will show up and > >>>>>>> display the contents of the @mapped_sites.to_json ( i am using > >>>>>>> render :json => @mapped_sites.to_json in the controller). > >>>>>>> Please let me know if you see something i am doing wrong. > >>>>>>> Thanks for your help on this so far Jim. > > >>>>>>> sk > > >>>>>>> On Dec 9, 11:49 pm, Jim Ruther Nill <[email protected]> wrote: > >>>>>>>> On Sat, Dec 10, 2011 at 3:56 AM, skrite <[email protected]> wrote: > >>>>>>>>> I am intrigued by this solution, Jim. > >>>>>>>>> i have a couple of questions, as it seems this is a cleaner way than > >>>>>>>>> what I am trying to do. > >>>>>>>>> The values that determine the circle color are in the database, and > >>>>>>>>> can change while the page is loaded. This is why i need them to > >>>>>>>>> update. > > >>>>>>>> i'll still go with my suggestion earlier. To update the colors, just > >>>>>>> update > >>>>>>>> the sites variable after completing the ajax request and then call > >>>>>>>> addCircles > > >>>>>>>> your ajax call may look like the following (this is totally untested > >>>>>>>> :D) > > >>>>>>>> $.ajax({ > >>>>>>>> url: your_url_here_that_returns_json_equivalent_of_@mapped_sites, > >>>>>>>> success: function(data) { > >>>>>>>> addCircles(data); > >>>>>>>> } > > >>>>>>>> }); > >>>>>>>>> So, somehow i still need to go to the server for that. I guess i am > >>>>>>>>> missing the part about how to get the @mapped_sites variable to the > >>>>>>>>> controller and back again to the page to rebuild the circles. > >>>>>>>>> Thanks for your time on this. > >>>>>>>>> sk > > >>>>>>>>> On Dec 9, 9:48 am, Jim Ruther Nill <[email protected]> wrote: > >>>>>>>>>> On Fri, Dec 9, 2011 at 11:04 PM, skrite <[email protected]> wrote: > >>>>>>>>>>> Hey, thanks for these links, very helpful. > >>>>>>>>>>> -sk > > >>>>>>>>>>> On Dec 8, 7:49 pm, "L.Karthikeyan" <[email protected]> wrote: > >>>>>>>>>>>> Hi, > > >>>>>>>>>>>> For this you need to use rjs Ajax request. Please refer the > >>>>>>>>>>>> following links, you will get an idea. > > >>>>>>>>>>>> 1.http://railscasts.com/episodes/43-ajax-with-rjs?autoplay=true, > >>>>>>>>>>>> 2. > >>>>>>>>>http://railscasts.com/episodes/229-polling-for-changes?autoplay=true > > >>>>>>>>>> one more option is to keep @mapped_sites to a javascript variable > >>>>>>>>>> so > >>>>>>> you > >>>>>>>>>> dont have to use ajax. you might also want to move the makeMarker > > ... > > read more » -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
