Date Based Rules

Flowable Engine
1

Hello,

We are trying to implement date based rules on Decision Table in Flowable DMN,
for e.g current date- start date > 2 or any two date comparison,

Any suggestions or links I can use to implement these rules?

Thanks in advance,
Yougal BISHT

2

If you want an input (date) variable to be compared with a static date defined in a rule you can do something like this;

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Or you could use custom (JUEL) expressions and make use of some build in helpers;

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For instance; with date:toDate() you create a Date instance which you can use in the the expression.
Also; date:now() creates a current date Date instance.

Hope this helps.

Regards,

Yvo

3

Hi @yvo,

Lets says input variable startDate=‘2020-01-01’ and I wanted check that difference between start date and current date > 30. How would the expression gonna looks like?

Like this:

${date:now() - startDate >30}

${date:now() - date:toDate(startDate) >30}

4

Can we get any documentation for custom (JUEL) expressions which can be use in Rule tables?

5

Blockquote
Can we get any documentation for custom (JUEL) expressions which can be use in Rule tables?

The default / included function delegates can be found here; repo

This can be expanded though. Have a look in the documentation to see how.

As for the date expression; you could do something like this; comparing two dates;

${date:addDate(startDate,0,0,30) < date:now()}  //add 30 days to startDate and do a comparison between dates

Regards,

Yvo

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