Is there a way to make parameters on an expression rule optional?...

Hi moritzw,

Yes, it is optional to take parameters in expression rule, if you are going to get the data by passing any parameter then it is needful, or else without using the parameters also we directly fetch the whole data from DB.

if myRule is a function with parameters: parameter1, parameter 2, and parameter3

the following code:

rule!myRule(
parameter1: local!something
)

works just fine. Strangely,

rule!myRule(
parameter1: local!something,
parameterIJustMadeUp: local!somethingElse,
)

also happens to work just fine. It ignores what you don't send. It ignores what you do send that it doesn't recognize, and doesn't even give you a warning. If you happen to misspell one of your keywords it can be ages to find the error.

You do have to send at least one of the parameters by keyword.

if myRule is a function with parameters: parameter1, parameter 2, and parameter3

the following code:

rule!myRule(
parameter1: local!something
)

works just fine. Strangely,

rule!myRule(
parameter1: local!something,
parameterIJustMadeUp: local!somethingElse,
)

also happens to work just fine. It ignores what you don't send. It ignores what you do send that it doesn't recognize, and doesn't even give you a warning. If you happen to misspell one of your keywords it can be ages to find the error.

You do have to send at least one of the parameters by keyword.