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Symbolika: výraz Arcade pro časové období nefunguje

deleted-user-jxpbpbjlZInj

Chci tedy symbolizovat polygonovou vrstvu dvěma různými symboly: jedním červeným, pokud nebyla v posledních 30 dnech zmapována. Druhým šedým, pokud v posledních 30 dnech zmapována byla. Tohle je výraz, který jsem napsal, ale symbolika je jednotně červená! Žádný rozdíl, přestože se hodnoty v mých polích liší:

var rightnow = now()
var lastedit = $feature.LastSurveyDate
var difference = (rightnow - lastedit)

If (difference >30) {
return "Toto nebylo v posledních 30 dnech zmapováno"
}
else {
return "Toto bylo v posledních 30 dnech zmapováno"
}

POMOC!

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Accepted answers

XanderBakker

Please be aware that "difference" is an existing function, which might be causing the problem. Could you try with a different variable name, like "days" for example?

<SPAN class="keyword token">var</SPAN> days <SPAN class="operator token">=</SPAN> <SPAN class="token function">DateDiff</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Now</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> $feature<SPAN class="punctuation token">.</SPAN>LastSurveyDate<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"days"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>days <SPAN class="operator token">></SPAN> <SPAN class="number token">30</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="string token">"This has not been surveyed in past 30 days"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="string token">"This has been surveyed in past 30 days"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

kenbuja

Try this expression

<SPAN class="keyword token">var</SPAN> rightnow <SPAN class="operator token">=</SPAN> <SPAN class="token function">now</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> lastedit <SPAN class="operator token">=</SPAN> $feature<SPAN class="punctuation token">.</SPAN>LastSurveyDate<SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> difference <SPAN class="operator token">=</SPAN> <SPAN class="token function">DateDiff</SPAN><SPAN class="punctuation token">(</SPAN>rightnow<SPAN class="punctuation token">,</SPAN> lastedit<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'days'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

If <SPAN class="punctuation token">(</SPAN>difference <SPAN class="operator token">></SPAN> <SPAN class="number token">30</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
  <SPAN class="keyword token">return</SPAN> <SPAN class="string token">"This has not been surveyed in past 30 days"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>
<SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
  <SPAN class="keyword token">return</SPAN> <SPAN class="string token">"This has been surveyed in past 30 days"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

That can also be simplified to

var difference = DateDiff(now(), $feature.LastSurveyDate, 'days');

If (difference > 30) {
  return "This has not been surveyed in past 30 days";
}
else {
  return "This has been surveyed in past 30 days";
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

deleted-user-jxpbpbjlZInj

Nope. Doesn't make a difference. Still a homogeneous red.

kenbuja

Can you share a snippet of your data?

deleted-user-jxpbpbjlZInj

Below there are two dates filled in for last survey date (a date field that I added after the feature service was published to AGOL as a hosted FS.) These two survey dates are attributes in two of the red grids above it.

Here's the expression:

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