Null values where missing date

[ChrisBroome]

Hi,

I've got a query set to calculate the number of working days based on two dates;

= (InitialDate as date, FinalDate as date ) as number =>
let
DaysBetweenDates = Duration.Days(FinalDate-InitialDate),
DaysList = List.Dates(List.Min({InitialDate,FinalDate}),Number.Abs(DaysBetweenDates)+1, Duration.From(1)),
WeekDaysList = List.Select(DaysList, each (Date.DayOfWeek(_, Day.Monday) < 5) ),
WorkingDays = (if DaysBetweenDates < 0 then -1 else 1) * List.Count(WeekDaysList)
in
WorkingDays

however, I don't always have dates available in these columns, and so where this is the case, I get an error. Can anyone suggest a way to prevent me getting these errors flagged? I'd be fine with just Null values in these instances, but can't work out how to get these to show instead of the error.

Regards

[CNENFRNL · Accepted solution]

Hi, @ChrisBroome , a most straightforward way is to enclose the function invocation into a try ... otherwise to catch errors like this,

Invoking = try Query1(#date(2020, 11, 10), null) otherwise ""

[Icey]

Hi @ChrisBroome ,

Please let us know if the replies above are helpful.

If they are, please always accept the replies making sense as solution to your question so that people who may have the same question can get the solution directly.

If not, please give us more details.

Best Regards,

Icey

[AlB · Accepted solution]

Hi @ChrisBroome 

Try this:

(InitialDate as any, FinalDate as any ) as any =>
    if (InitialDate=null  or  FinalDate=null) then null else
        let
            DaysBetweenDates = Duration.Days(FinalDate-InitialDate),
            DaysList = List.Dates(List.Min({InitialDate,FinalDate}),Number.Abs(DaysBetweenDates)+1, Duration.From(1)),
            WeekDaysList = List.Select(DaysList, each (Date.DayOfWeek(_, Day.Monday) < 5) ),
            WorkingDays = (if DaysBetweenDates < 0 then -1 else 1) * List.Count(WeekDaysList)
        in
            WorkingDays

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers 

[CNENFRNL · Accepted solution]

Hi, @ChrisBroome , a most straightforward way is to enclose the function invocation into a try ... otherwise to catch errors like this,

Invoking = try Query1(#date(2020, 11, 10), null) otherwise ""