Row Context issues in IF compare

[Anonymous]

I have two tables: 'Ticket Comments Relations' and 'Tickets'.

In 'Tickets' I have a calculated column called Earliest Employee Comment that spits out an id based on some calculations. For example, this id could be 48985. I want to then in 'Tickets' create a calculated column that looks up this id in ''Ticket Comments Relations' and checks the value in [is_customer_comment] whether it is 0 or 1. If it's 1, then it does the calculation. If it's 0 then it returns -1 as the value instead. In our example, it would come out to be -1, and skip the long calculation. I keep getting the "A single value..." error as shown in the screenshot. What am I doing wrong? How do I provide a row context?

[amitchandak]

@Anonymous , looking at the formula, you should create it as a column. Not measure

[Anonymous]

It has always been a column. I haven't done anything related to measures.

[sturlaws]

Hi @Anonymous,

From what I understand, you are creating the column [earliest employee comment] in the 'Ticket'-table. The way you have written your dax, you are not providing any context to the 'earliest employee comment'-table, and it tries to return all rows. If an ID is only present once in 'ticket comments relations', you can make use of LOOKUPVALUE(). If there is a relationship you can use RELATED().

But if an ID can have both [is customer comment]=0 and [is customer comment]=1, you would have to do something like:

earliest employee comment =
IF (
    COUNTROWS (
        FILTER (
            'ticket comments relations',
            [is customer comment] = 1
                && 'ticket comments relations'[target id] = tickets[id]
        )
    ) >= 1,
    MINX (
        FILTER (
            'ticket comments relations',
            'ticket comments relations'[target id] = tickets[id]
                && 'ticket comments relations'[type] = 2
        ),
        'ticket comments relations'[comment id]
    ),
    -1
)

Cheers,
Sturla

If this post helps, then please consider Accepting it as the solution. Kudos are nice too.

[aj1973]

@Anonymous 

I would suggest, in your measure create a variable

VAR = customer_comment = CONTAINS('Table','Table'[is_customer_comment], 1)

then use the variable in your IF function

[az38]

Hi @Anonymous 

for measures you should point out to exactly cell that you use in statement

In your case you could replace IF(Table[Column], ...

to IF(MAX(Table[Column]), ...