Issue with evaluating UI expression

vikrams290 over 8 years ago

I have two dropdown: first one "subjects" with single selection and the second dropdown "students" with multiple selection dropdown. Once I select the subject and student(s) I would list in a paging grid in the same form. I would be able to add again making a different subjects and students selection. It will be displayed like below.

| Students - Subject
| Anil - Maths
| Babu - Maths
| Anil - Physics
| Satish - Physics
| Ganesh - Physics

It will take only 10 items and throws below ERROR when I tried adding more than 10 items in the grid
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Error evaluating UI expression:- Expression evaluation error in rule <rule name> at function 'union' [line 72] . it cannot compare type list of text string. |
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0 Lakshmi Meyyappan over 8 years ago

The union function often fails when it doesn't recognize both types, you may be able to wrap each merge() statement with touniformstring() to enforce the correct type. Also, if the purpose of the union() is to remove duplicates, try using a union with an empty array to remove duplicates: union(merge({local!students}, {local!subjects}), {})
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0 Lakshmi Meyyappan over 8 years ago

The union function often fails when it doesn't recognize both types, you may be able to wrap each merge() statement with touniformstring() to enforce the correct type. Also, if the purpose of the union() is to remove duplicates, try using a union with an empty array to remove duplicates: union(merge({local!students}, {local!subjects}), {})
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