Thanks for the solution which worked When i select the data entity and the time and hit the submit button with below query ...But without selecting the env test or prod the query get search based on the default dropdown applies to the query if it is test index as "np-ap" and sets stageToken as test.
I want the submit button to work even for the env selection ...along with data entity and date
index="np-ap" AND source="--a-test"
<query>index=$indexToken$ AND source="-a-$stageToken$"
<form version="1.1" theme="dark">
<label> stats</label>
<fieldset submitButton="true">
<input type="dropdown" token="indexToken1">
<label>Environment</label>
<choice value="pd-ap,prod">PROD</choice>
<choice value="np-ap,test">TEST</choice>
<change>
<eval token="stageToken">mvindex(split($value$,","),1)</eval>
<eval token="indexToken">mvindex(split($value$,","),0)</eval>
</change>
<default>np-ap,test</default>
</input>
<input type="dropdown" token="entityToken">
<label>Data Entity</label>
<choice value="aa">aa</choice>
<choice value="bb">bb</choice>
<choice value="cc">cc</choice>
<choice value="dd">dd</choice>
<choice value="ee">ee</choice>
<choice value="ff">ff</choice>
<default>aa</default>
</input>
<input type="time" token="timeToken" searchWhenChanged="false">
<label>Time</label>
<default>
<earliest>-24h@h</earliest>
<latest>now</latest>
</default>
</input>
</fieldset>
<row>
<panel>
<html id="APIStats">
<style>
#user{
text-align:center;
color:#BFFF00;
}
</style>
<h2 id="user">API</h2>
</html>
</panel>
</row>
<row>
<panel>
<table>
<title>Unique</title>
<search>
<query>index=$indexToken$ AND source="-a-$stageToken$"
| stats count </query>
<earliest>$timeToken.earliest$</earliest>
<latest>$timeToken.latest$</latest>
</search>
<option name="drilldown">none</option>
<option name="refresh.display">progressbar</option>
</table>
</panel>
</row>
</form>
