シンボル表示：日付範囲の Arcade 式が機能しない

deleted-user-jxpbpbjlZInj

ポリゴンレイヤーを2種類のシンボルで表示したいです。過去30日間に調査されていない場合は赤、調査されている場合はグレーにしたいです。次の式を書いたのですが、シンボル表示がすべて赤になってしまいます。フィールドの値に違いがあるのに、表示に違いがありません。

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

If (difference >30) {
return "過去30日間に調査されていません"
}
else {
return "過去30日間に調査されています"
}

助けて！

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>