Still not working for me. Maybe something in my settings (stretch, but who
knows?); more than likely just lack of experience. I'll update when I
figure this out.
On Saturday, March 1, 2014 2:22:53 PM UTC-8, Benjamin Wanicur wrote:
>
> I'm not sure why you are using loops here, but obviously I'm seeing just a
> small part of your application. And as for using JS to reload the page or
> redirect (window.location), I would not recommend it unless there is not
> another alternative. Here is the big takeaway (imho)... AJAX requests
> will not cause a page reload or redirect etc..., so if you want that to
> happen, consider a "normal" HTTP request.
>
> Another important concept is the the $(function(){ /*code in here/* });
> means that the JS will only execute after the page loads. This way the
> HTML that the JS often needs to interact with is loaded before the JS tries
> to execute.
>
> As you pointed out, my previous example loaded the position coords into
> the form every time the page was loaded. I do not think that is an
> expensive operation, but if you do not want that to happen, consider
> another option. You can have some JS code execute only when the form is
> submitted (when the user clicks the "CHECK IN" button. Here is a code
> example:
>
> <script type="text/javascript">
> // This code will execute after the HTML has finished rendering (page load)
> $(function(){
> $('#check-in-form').submit(function(){
> if(navigator.geolocation){
> navigator.getCurrentPosition(function(position){
> $('#lng').val(position.coords.longitude);
> $('#lat').val(position.coords.latitude);
> });
> }
> });
> });
> // When the form is submitted, load the values from the
> navigator.getCurrentPosition() function into our hidden form fields
> </script>
>
> <form action='/users/set_geolocation' id="check-in-form">
> <input type="hidden" name="latitude" id="lat" />
> <input type="hidden" name="longitue" id="lng" />
> <input type="submit" value="--> Check-In!" />
> </form>
>
>
> On Sat, Mar 1, 2014 at 1:08 PM, Ephraim Feig <[email protected]<javascript:>
> > wrote:
>
>> No happy solution yet, but this is what I got so far.
>>
>> I have only spent a little time on the submit_tag suggestion (which I
>> like a lot) but have not yet gotten it. That's just my ignorance of the
>> intricacies of JQuery (oh but for more experience), but I am quite sure I
>> will get it to pass the parameters. What concerns me with this method is
>> that (I think) because I have to load the parameters before the submit call
>> in order to have them ready for the form, I would have to execute
>> navigator.geolocation ahead of time, and since I don't know when somebody
>> will want to checkin, I would have to continually call it. I can avoid it
>> by creating a splash page that gets called first only when one wants to
>> checkin, and then do the submit in the splash page (not pretty). Even here,
>> will the javascript not load the splash page?
>>
>> As for the link_to method, when I add window.location.reload(true),
>> strange things happen, depending on where in the script I add it. If I add
>> it inside the most inner loop, the server signs me off (protect from
>> forgery works). When I put it in the outer loop, the thing not just
>> reloads, but it keeps reloading and reloading. I find it strange, because I
>> have it as click(function). I think that I can work around the looping, but
>> I don't like that at all. I feel to exposed to possible bad things
>> happening (like an infinite loop in production).
>>
>> So, I am still working on this.
>>
>> Ben, thanks for the input.
>>
>>
>> On Friday, February 28, 2014 11:47:44 AM UTC-8, Ephraim Feig wrote:
>>>
>>> 0 down vote
>>> favorite<http://stackoverflow.com/questions/22102460/page-does-not-update-after-navigator-geolocation-call-in-rails-check-in-check#>
>>>
>>>
>>> I am using standard HTML5 location services. A user comes into a cafe,
>>> opens the app, clicks on "Check-in!" and the app gets the location and uses
>>> it until the user later clicks "Check-out!".
>>>
>>> In my viewer, I call on a script containing navigator.geolocation and it
>>> does its job. I successfully pass the latitude and longitude parameters to
>>> my controller and it updates everything. But when all is done and I
>>> redirect_to root_url, the new page does not refresh (I know at some point I
>>> should do it more elegantly and just update the link part, but for now, I
>>> just want to get this going and understand what is going on). Here is my
>>> code:
>>>
>>> In my viewer-
>>>
>>> <% if (@voterinfo.checkin == 0) %>
>>> <li>
>>> <h4> <%= link_to "-->Check-In!", "#", :id => 'findMe' %>
>>> </h4>
>>> <script>
>>> $(function(){
>>> $("a#findMe").click(function(){
>>> if (navigator.geolocation) {
>>>
>>> navigator.geolocation.getCurrentPosition(function (position) {
>>> $.post('/users/set_geolocation/',
>>> {latitude: position.coords.latitude,
>>> longitude:
>>> position.coords.longitude,
>>> dataType: 'float'});
>>> }, function () {
>>> alert('We couldn\'t find your position.');
>>> });
>>> } else {
>>> alert('Your browser doesn\'t support
>>> geolocation.');
>>> }
>>> });
>>> })
>>> </script>
>>> </li>
>>> <% else %>
>>> <li> <h4><%= link_to "--->CHECK-OUT!", :controller => :users,
>>> :method => :set_geolocation %></h4></li>
>>> <% end %>
>>> </ul>
>>> <% end %>
>>>
>>> And here is the relevant part of my users_controller-
>>>
>>> def set_geolocation
>>> @user = current_user
>>> @voterinfo = Voterinfo.find_by_user_id(@user.id)
>>> if (@voterinfo.checkin == 0)
>>> @user.update_attributes(:longitude => params['longitude'], :latitude =>
>>> params[:latitude])
>>> @user.save(validate: false)
>>> sign_in(@user)
>>> @voterinfo.checkin = 1
>>> @voterinfo.save
>>> redirect_to root_url
>>> else
>>> @voterinfo.checkin = 0
>>> @voterinfo.save
>>> redirect_to root_url
>>> end
>>>
>>> end
>>>
>>> Thank you for any help here.
>>>
>>>
>>> --
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>
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