[rules-users] Can business people write rules?

[Vincent Legendre]

Le 15/03/2011 22:53, jwest a écrit :
> However, I don't know how to make this first line more complex using 
> the guided editor.
> For example, you can hover on the second line of the rule and click on 
> it and the shown dialog pop ups, allowing me to make this line more 
> complex through adding restrictions on a field, new formula, etc. I 
> can't get a similar dialog for the first line of the rule. 
No you can't ... A DSL sentence stands for a whole condition (or 
action). You can't really "add" contraints in it. One thing that could 
work is to define DSL phrase starting with "-" (see documentation) and 
add them just under the main DSL sentence. But careful using that, as 
DSL phrase are not filtered according to their context, your DSL may 
become complex and a bad usage (which becomes more and more frequent as 
the DSL grows) will produce rules that does not compile, or worse, that 
does silly things ...


> I think I should be able, otherwise how could I write an 'OR' 
> condition between this 2 lines? 
You must first create a "OR" condition (something like "one of the 
following is true :"), which will create a container for sub-conditions. 
You can then insert the condition inside this "OR" container.

> Also, enums are displayed as a simple selection list (combo box) in 
> the DSL sentence. Is it possible to have multi-selection, effectively 
> getting a list of selected values to be used inside the rule?
I don't think so


To gain flexibility on rules coding, you should consider not using DSL, 
or use it when you are really forced to (it is my opinion, as discussed 
in this thread : 
http://drools-java-rules-engine.46999.n3.nabble.com/Who-writes-your-rules-Dev-vs-BA-td2398166.html)