Velocity Scripting an equation with dates

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Anonymous
Not applicable

Velocity Scripting an equation with dates

Here is what I'm trying to do:

Find the difference between todays date, and the lease creation date.

Subtract the difference from 89 days.

Display that number.

Here is what I have so far:

Screen Shot 2018-05-22 at 4.31.08 PM.png

I just can't get the "minus 89 days" to work.

2 REPLIES 2
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Level 10 - Community Moderator

Re: Velocity Scripting an equation with dates

You should read this seminal post​ on days and times in Velocity, where I explain that you must always include a timezone when parsing dates.

In particular, this section explains how to use $date.difference without surprising shifts of one day in either direction.

Once you set the tz (by including the boilerplate code at the top of the post), you simply call $math.sub:

#set( $DAYS_OFFSET_BASE = 89 )

#set( $ret = $calNow.set(

   $calNow.get($calConst.YEAR),

   $calNow.get($calConst.MONTH),

   $calNow.get($calConst.DAY_OF_MONTH),

   0,

   0,

   0

) )

#set( $ret = $calNow.set($calConst.MILLISECOND,0) )

#set( $calLeaseCreateDate = $convert.toCalendar(

  $convert.parseDate(

    $lead.prog_leasecreatedate,

    $ISO8601DateOnly,

    $defaultLocale,

    $defaultTimeZone

  )

) )

#set( $daysUntilLeaseCreate = $date.difference($calNow,$calLeaseCreateDate).getDays() )

#if(  $daysUntilLeaseCreate > 0 )

#set( $daysOffsetFromBase = $math.sub($DAYS_OFFSET_BASE, $daysUntilLeaseCreate) )

prog_leasecreatedate offset is $daysOffsetFromBase.

#else

prog_leasecreatedate is not in the future.

#end

Finally, when posting code, please use the syntax highlighter in Advanced Editor, not a screenshot:

pastedImage_2.png

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Level 6

Re: Velocity Scripting an equation with dates

Thanks again Sanford, that blog post of yours is extremely useful.