On Sat, Mar 16, 2013 at 10:42 PM, Michael Ellis
<michael.f.el...@gmail.com> wrote:
> I've got an application that accepts JSON test reports from remote systems
> and displays them in a SQLFORM grid with the most recent reports first. The
> controller and view for what the user sees is essentially the following:
>
> CONTROLLER
> def test_report_manage():
> """ Controller for Reports page """
> ...
> form = SQLFORM.grid( ... )
> return locals()
>
> VIEW
> ...
> {=form}
> ...
>
> The JSON controller is separate from the above. It merely validates and
> inserts new report records. The reports arrive at random intervals. My
> client has asked for the page to automatically update when new reports
> arrive. What's the cleanest way to go about this, bearing in mind that this
> functionality is mainly intended for demonstration purposes at a trade show?
>
The easiest way is to poll. Something like this:
==== controllers ======
def test_report_manage():
""" Controller for Reports page """
...
return dict(poll_interval=2000) # poll at 2 secs intervals
# if None, don't poll
def test_report_manage_poll():
form = SQLFORM.grid( ... )
return form
==== view for test_report_manage controller) =====
<p>
<a href="#" class="btn btn-small btn-success"
onclick="refresh_grid();return false"><i
class="icon-refresh icon-white"></i>Refresh</a>
</p>
{{ =LOAD(f='test_report_manage_poll', ajax=False, ajax_trap=True,
target="grid_component") }}
<script>
var refresh_grid = function() {
web2py_component("{{ =URL(f='test_report_manage_poll')
}}","grid_component");
}
$(document).ready(function() {
{{ if poll_interval is not None: }}
setInterval(refresh_grid, {{ =poll_interval }});
{{ pass }}
});
</script>
Regards
Ricardo
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