Count of Filtered Portal Values

[crazybake]

I have a new table named CourseList - a self join table using courseID. Within a layout, I have a portal which is filtered and sorted based on dropdown menus and checkboxes.

For example, I can see which courses are assigned to a particular budget for a particular quarter (e.g., in fall 2015, I have (7) courses for budget A, which are taught by (3) instructors). I have also created a duplicate single-row portal to get the record count (or # courses for that qtr). How can I get unique counts for number of teachers from the filtered portal data. For example Smith teaches (4) classes, Jones teaches (2) classes and Wilson teaches (1) class - I need to get a count of (3).

 

[laurentades]

Have you tried using a custom function like this one ? Really helped me out of a pickle lately...

[eos]

Try this:

• create a value list of CourseList::teacherID
• create a summary field in CourseList as sListOfTeacherID
• put the summary field into a single-row, filtered portal
• assign that field an object name

The count of teachers is 

ValueCount ( 
  FilterValues ( 
    ValueListItems ( "" ; "TeacherIDVL" ) ; 
    GetLayoutObjectAttribute ( "objectNameOfRelatedASummaryField" ; "content" ) 
  ) 
)

 

[crazybake]

Try this:

• create a value list of CourseList::teacherID
• create a summary field in CourseList as sListOfTeacherID
• put the summary field into a single-row, filtered portal
• assign that field an object name

The count of teachers is 

ValueCount ( 
  FilterValues ( 
    ValueListItems ( "" ; "TeacherIDVL" ) ; 
    GetLayoutObjectAttribute ( "objectNameOfRelatedASummaryField" ; "content" ) 
  ) 
)

 

I was so close to this initially, and I still cannot get it to function. The portal will show the (11) sections (and the portal count will show 11.) However, when I create the summary field as a list of Teacher IDs, I get duplicate IDs.

 

Sorry - of course duplicates are listed - thus the idea of the filter values. I just cannot get the count to work properly. I changed the info you gave to include get(FileName), instead of "" for the location of the value list and it initially counted correctly. I then realized that changing it back to "" would also update the field and count correctly... so... what I am finding is that the field is not updating when I change the dropdown criteria. I am not storing the results and tried to put a script trigger to commit records, but does not seem to work. Any Ideas?

[eos]

If you have a created a calculation field with this formula, make sure it is set to unstored.

[crazybake]

Thanks eos.

I thought I had done so - but I had not. All works well now