Unable to detach file from a!fileUploadField

RE: Unable to detach file from a!fileUploadField

SGT FLANAGAN Michael — Thu, 18 Jan 2024 16:55:25 GMT

Yes I'm developping my first app and I have no dev background.

I'll retry with your code as an example, thanks

RE: Unable to detach file from a!fileUploadField

Stefan Helzle — Thu, 18 Jan 2024 16:04:58 GMT

Are you new to Appian? The way how Appian data structures work, will take a while to get used to. Yes, this is considered a one-to-many which makes it a list.

I turned your code into a working example.

a!localVariables(
  local!case: a!map(
    id: 42,
    documents: null
  ),
  a!fileUploadField(
    label: "Pièce jointe",
    labelPosition: "ABOVE",
    placeholder: "Placez la pièce jointe ici",
    target: tofolder(123),
    maxSelections: 3,
    value: index(local!case.documents, "documentId", null),
    saveInto: a!save(
      target: local!case.documents,
      value: a!forEach(
        items: save!value,
        expression: a!map(
          id: null,
          documentId: fv!item
        )
      )
    ),
    validations: {if(
      or(fv!files.size > 2000000), 
      "Le fichier ne peut pas faire plus de 2MB. Merci de retirer : " & 
      index(fv!files, "name", where(fv!files.size > 2000000), {}), 
      ""
    )}
  )
)

RE: Unable to detach file from a!fileUploadField

SGT FLANAGAN Michael — Thu, 18 Jan 2024 16:01:26 GMT

Thanks for the answer,

Why is it defined as a list of record ? I'm just targeting a normal field of a normal record but through a relationship, I didn't define it as a list or an array at any moment, why is the rule input considered as a list ? Is it because the relationship is one-to-many ?

RE: Unable to detach file from a!fileUploadField

Stefan Helzle — Thu, 18 Jan 2024 15:56:34 GMT

That's no surprise. You try to write a list with zero items into a single field in a related record.

I did never try this specific situation myself, but when I try to store document data to a list of records, I do that directly in the saveInto. What I mean is, to run a foreach on save!value creating a record structure for each file, and then store that to the rule input.