Document uploads on gridLayout

saileshd over 7 years ago

I have a gridLayout where I am uploading a document to each record. If the Docuemnt is already uploaded to the record it displays my grid, but if the document is not uploaded it gives an error as below:
"Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error in rule 'icams_editlogisticsgroupeditmoduleitemroweach' at function a!applyComponents [line 195]: Invalid index (1) for list: valid range is empty"

Any Suggestions?

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0 gaurava322 over 7 years ago

Can u please share the code that you have written.
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0 gaurava322 over 7 years ago

I too have implemented Document upload component on grid layout, but never faced this issue.
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0 Sally Mason
Appian Employee
over 7 years ago

The error indicates you are trying to access an index that does not exist; so try using a lower index than '1', use '0' instead. Let us know if that resolves your issue?
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0 saileshd over 7 years ago

Yes you are right Sally. Let me decode it... I guess I will be able to address it now :)
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0 Karthik over 7 years ago

@sally, Do we have index 0? I think appian array indexes are starting from 1. Or probably I didn't understand your response well.
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0 Sally Mason
Appian Employee
over 7 years ago

Before calling "icams_editlogisticsgroupeditmoduleitemroweach" check that the array is not null ( isnull() ) as the error mentions the "valid range is empty.

More information in these functions at forum.appian.com/.../Array_Functions.html
forum.appian.com/.../Informational_Functions.html
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0 priyankasabankar over 7 years ago

yes, the error indicates that, the index you are reffering to is not present, checking null before passing the list may resolve the issue!
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0 chetany
A Score Level 1
over 7 years ago

Be aware with using isnull on arrays. (whether CDT or primitive array).
If the variable used for the array is actually null, then null will work as expected and return true.
But, if the array is just empty (but not null), isnull will return false.

If not kept in mind, this error may cause unintended behavior.
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0 ayishabanum1 over 7 years ago

We need to do null check before passing the list . It may resolve the issue.
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0 saileshd over 7 years ago

Yes thats right. Its resolved now. Thanks everyone!
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