Why is the condition match inside selection not working?

[robertlynch2020]

Hi

Normally have code like this

<selection>

          <set token="time_selection.earliest">$start$</set>
          <set token="time_selection.latest">$end$</set>    


        </selection>

I now have to add a condition to the selection, however its not working inside selection.

        <selection>


          <condition match="$save_test_time_token.earliest$ == $save_test_time_token.earliest$">
                <set token="time_selection.earliest">$start$</set>
                <set token="time_selection.latest">$end$</set>  
            </condition>


        </selection>

[niketn · Accepted solution]

@robertlynch2020, I dont understand the comparison of same token on both left and right side of the expression i.e. $save_test_time_token.earliest$ == $save_test_time_token.earliest$. However, you can set token conditionally using <eval> with case condition. With the following approach the token will be set only if the expression is true else it will not be set

Following is a sample code, please change the LHS and RHS of the condition under case statement as per your need.

    <selection>
      <eval token="time_selection.earliest">case("$save_test_time_token_earliest$"!="$save_test_time_token_latest$",$start$)</eval>
      <eval token="time_selection.latest">case("$save_test_time_token_earliest$"!="$save_test_time_token_latest$",$end$)</eval>
    </selection>

[robertlynch2020]

Thanks so much for looking at this for me.
In fact i think we are close to an answer here. Yes i did have a typo in my initial question sorry about that.

So this is what i am trying to do. I have a query that takes time from $time_token.earliest$. This is also a timeline chart, this also sets time for a different time token that drives multiple other pannels

However i have noticed when $time_token.earliest$=time_selection.earliest. It will still re-set the same value and this will re-drive all my other panels. This is bad for performance etc..

Original Query
      <query></query>
              <earliest>$time_token.earliest$</earliest>
              <latest>$time_token.latest$</latest>
            </search>
            <selection>
              <unset token="execute_tps_save_test"></unset>
              <set token="time_selection.earliest">$start$</set>
              <set token="time_selection.latest">$end$</set>    
              </selection>

Updated, however not 100% working. I think the issues, is it gets unset if not true and this is NULL to my other pannels.

  <query></query>
          <earliest>$time_token.earliest$</earliest>
          <latest>$time_token.latest$</latest>
        </search>
        <selection>
          <unset token="execute_tps_save_test"></unset>
          <!--set token="time_selection.earliest">$start$</set>
          <set token="time_selection.latest">$end$</set-->  


           <eval token="time_selection.earliest">case("$time_selection.earliest$"!="$time_token.earliest$",$start$)</eval>
       <eval token="time_selection.latest">case("$time_selection.latest$"!="$time_token.latest$",$end$)</eval>
          </selection>

So is there a way to check to see if you are the same as original and do nothing else update.

[niketn]

@robertlynch2020, just try == instead of != inside case condition block and the behavior should reverse.

<eval token="time_selection.earliest">case("$time_selection.earliest$"=="$time_token.earliest$",$start$)</eval>
        <eval token="time_selection.latest">case("$time_selection.latest$"=="$time_token.latest$",$end$)</eval>

[robertlynch2020]

Thanks again

In fact $time_selection.earliest$ jumps starts at 1518502650, the undefined then back to 1518502650 => search reruns. Even if the two values are the same!

Is there anyway to say don't change the token to undefined. In fact dont do anything stay 100% the same

[niketn]

So that means you need else condition and you need to retain the token value same as what it is. Can you try the following where true() condition has been added to handle the else condition and retain the original value of the token?

 <eval token="time_selection.earliest">case("$time_selection.earliest$"=="$time_token.earliest$",$start$,true(),$time_selection.earliest$)</eval>
         <eval token="time_selection.latest">case("$time_selection.latest$"=="$time_token.latest$",$end$,true(),$time_selection.latest$)</eval>

[robertlynch2020]

Hi

Thanks for this, in the end i had to remove the quote to get it to work.
Cheers for your help 🙂

case($time_selection.earliest$ = $time_token.earliest$,$start$,true(),$time_selection.earliest$)

case($time_selection.latest$ = $time_token.latest$,$end$,true(),$time_selection.latest$)

[niketn]

@robertlynch2020, glad you figured it out. I had missed that epoch time will be numeric. However, I would have expected string comparison to work as well 🙂

[somesoni2]

The <condition> is not a valid child element for <selection> tag.