tag problem

w5afw · Post by **w5afw** » Sun 05 Apr 2009 3:29 am

I'm trying to print the temperature #temp twice on one page and the second instance always outputs ??. How can I fix this? Thanks...

MarkB · Post by **MarkB** » Sun 05 Apr 2009 9:54 am

I just put:

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<#temp><#temp><#temp><#temp>

in the standard indexT.htm file and let Cumulus process and upload it to the web server. The web page dutifully showed:

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12.112.112.112.1

Could you post some more information about your environment?

Post by **steve** » Sun 05 Apr 2009 10:12 am

I can't think of any reason duplicated tags shouldn't work, if you have the syntax correct.

Steve

beteljuice · Post by **beteljuice** » Sun 05 Apr 2009 11:42 am

I assume you are staying with the AJAX philosophy ?

I haven't inspected the code you are using, but it probably uses unique id substitution. So every 'variable' used on any particular page would have to be unique.

MarkB · Post by **MarkB** » Sun 05 Apr 2009 12:28 pm

This is a snippet from the page

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<head>
  <title>w5afw Weather Station</title>
  <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
  <!-- **** layout stylesheet **** -->
  <link rel="stylesheet" type="text/css" href="style/style_1col_bottom.css" />
  <!-- **** colour stylesheet **** -->
  <link rel="stylesheet" type="text/css" href="style/colour.css" />
  <script src="prototype.js" type="text/javascript"></script>
  <script type="text/javascript">
//<![CDATA[
    document.observe('dom:loaded', function () {
		var url = 'xmlreturn.php';

This is based on Ritchie's AJAX implementation. I seem to remember it copes with multiple span occurences by making the span name unique. Try adding '_01' to the temperature span ID to make it unique.

Use:

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<h1><span id="#temp" class="refresh"></span>&nbsp;<span id="#temp_01" class="unit"></span></h1>

In place of:

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<h1><span id="#temp" class="refresh"></span>&nbsp;<span id="_01#temp" class="unit"></span></h1>

This is all from my lousy memory - the correct answer is buried somewhere in the text/comment sections of the code...

Post by **steve** » Sun 05 Apr 2009 1:00 pm

So this is actually nothing to do with Cumulus tags?

Steve

MarkB · Post by **MarkB** » Sun 05 Apr 2009 2:37 pm

steve wrote:So this is actually nothing to do with Cumulus tags?

Steve

Yep - This has nothing at all to do with the Cumulus tags...

beteljuice · Post by **beteljuice** » Sun 05 Apr 2009 2:43 pm

Steve - Nowt to do with Cumulus

Mark, as far as I can see all you have done is change the temp UNIT id to an 'illegal' value

I cannot see the same flexibility for duplicate 'data' values as there is for duplicate 'unit' values.
You would have to get your hands dirty in the script itself

w5afw · Post by **w5afw** » Sun 05 Apr 2009 3:12 pm

trying; still no joy. the first instance:

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		<h1><span id="#location" class="onceonly"></span> Weather<br><br>&nbsp;&nbsp;<span id="#temp" class="refresh"></span><span id="_01#temp" class="unit"></span></h1>

and the second:

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<div class="datacontent">
	  	<h2>Temperature and Humidity</h2>
		<div class="datacontentp">
		<table width="100%">
			<tr class="td_temperature_data">
			    <td>Temperature: <span id="#temp" class="refresh"></span>&nbsp;<span id="_02#temp" class="unit"></span></td>
			    <td>Dew&nbsp;Point: <span id="#dew" class="refresh"></span>&nbsp;<span id="_03#temp" class="unit"></span></td>

the test url is:
www.w5afw.com/wx/index.php

w5afw · Post by **w5afw** » Sun 05 Apr 2009 4:25 pm

is this the problem?

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$$('.onceonly').each(function(staticitem) { 
			staticitem.update('**'); 
  			var staticAjax = new Ajax.Updater(staticitem.id,url,{parameters: {item: staticitem.id, property: 'value'} , method : 'post'});				
		});

Once only use of #temp?

beteljuice · Post by **beteljuice** » Sun 05 Apr 2009 5:41 pm

Right idea (sort of) - it's the limitations of the dynamic call.

Although the static call has the same limitations.

w5afw · Post by **w5afw** » Sun 05 Apr 2009 5:46 pm

this is most curious... any ideas for a fix?

MarkB · Post by **MarkB** » Sun 05 Apr 2009 8:11 pm

beteljuice wrote:change the temp UNIT id to an 'illegal' value

Strictly speaking the # in the ID makes it an illegal value

This is why I developed my own version of the AJAX updater https://cumulus.hosiene.co.uk/viewtopic.php?f=14&t=832. This does away with the #, supports multiple use of elements on a page (assuming you 'uniqeify' the id ) and does not require the use of PHP postback. My index page uses the <interval> value twice, as in this extract

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<p>The web site uses JPGraph 2.3.4 to realise the graphs, which are updated every <span class="ajax" id="interval_01"></span>.
Realtime observation data in the tables are updated by Cumulus and Ajax every 15 seconds.
All other pages on the site are updated every <span class="ajax" id="interval_02"></span>.</p>

w5afw - I can't really comment on the AJAX you are using as I don't use it myself, but I do remember seeing some comment within it that made me think it would support multiple tag uses...

Cheers, Mark

w5afw · Post by **w5afw** » Sun 05 Apr 2009 8:49 pm

thanks, Mark; I will continue to try; also, when I get time, I'll try your template; cheers, lex

ritchie · Post by **ritchie** » Sun 05 Apr 2009 10:39 pm

Hey - I just get back from a tour of Europe and get problems in the code

I just took a quick look at your page - it looks OK, but I suspect there may be an issue in the changes you have made.
You have _06#temp & _07#temp twice on the page, so you may well have plain old #temp there more than once too !

You can have multiple occurences of any tag field you want, as long as each is made unique by prefixing with _xx to each, whe xx is the unique value, it can be whatever you want.
My current code has dispensed with the # character for compliance, so I will have to go back a revision to see how it went originally.

The difference between the span classes, is to reduce some of the overhead. Once only is just that, it gets the data once when the page loads, the other, refresh, gest the value and sets up the refresh interval, and unit is the same as static, except it is getting the unit content for the value.

Take a look at pe19.station-weather.co.uk/ajaxindex.htm but I haven't made the latest PHP for the server available yet

I'll have some more time later this week for help if you need it.

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