Hi All ,

I am just trying to write a simple rule but not sure how can i write it , Please help me as i am new to drools and still in the learning phase .

I have a below Fact with three fields

Person

    firstName
    lastName
    fullName

Now i want to assign fullName = firstName + lastName which i am not able to find out how can i do that.

I am able to define the when part using guided editor but able to define then part , Please help

rule "PersonRules"
    dialect "mvel"
    when
        p : Person( firstName != "" && lastName != "" )
    then

Thanks,
Ashish