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rpiboy_1
Resolver I
Resolver I

Passing an argument through Expression.Evaluate

Building from this thread: Solved: Pass Text String as Function Name - Microsoft Fabric Community

 

And having also reviewed Chris Webb's blog post as noted in the same thread.

 

I need to pass an arguement to the function, from a colum. So my set-up looks like this:

 

GeoDataType
USprojects
USusers
CAprojects
CAusers

 

so now I need to write an expression that looks like this:

 

 

    #"ExecuteFunction" = Table.AddColumn( 
        Source,
        "AdminData",
        each Expression.Evaluate(
            "FnAdminQuery"&[Geo]&"("&[DataType]&")",
            #shared
        )

 

 

The trouble of course is the inner referecnce to the 'DataType' column. I was able to create a combined Record that included the List of [DataType] with #shared (per CW's blog post) but of course I get an error because I'm attempting to pass a List to the Function Arguement that is looking for a Text String. I'm not sure how to pass the current row state to the inner function to get the correct index from the List, or perhaps a different approach?

 

CW's blog post only deals with static variables that are constant for the entire expression. If Reza Rad's blog post (referenced by CW) has more information, the current link returns a 500 error.

1 ACCEPTED SOLUTION
slorin
Super User
Super User

Hi, 

 

use Function.Invoke

 

Function.Invoke(Expression.Evaluate("FnAdminQuery"&[Geo], #shared),{[DataType]})

 Stéphane

View solution in original post

3 REPLIES 3
slorin
Super User
Super User

Hi, 

 

use Function.Invoke

 

Function.Invoke(Expression.Evaluate("FnAdminQuery"&[Geo], #shared),{[DataType]})

 Stéphane

Thanks so much! That was much easier than I was expecting!

rpiboy_1
Resolver I
Resolver I

@slorin perhaps you can shed some further light on my challenge. TY!

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