Document in Folder

RE: Document in Folder

daniels9627 — Fri, 02 Feb 2024 16:14:52 GMT

Pleasure!

RE: Document in Folder

daniels9627 — Fri, 02 Feb 2024 16:14:20 GMT

Thanks Harshit, works nicely!!

RE: Document in Folder

Stefan Helzle — Fri, 02 Feb 2024 16:13:55 GMT

[quote userid="263493" url="~/discussions/f/best-practices/33936/document-in-folder/128797"]read through most of Stefan's book[/quote]

Very much appreciated :-) Welcome to Appian!

RE: Document in Folder

Harshit Bumb (Appyzie) — Fri, 02 Feb 2024 16:08:46 GMT

The document ID will always be incremental as Amaan mentioned and can be relied on. But here is an alternate approach with one of my favorite functions - displayValue() using the created date attribute

a!localVariables(
  local!documents: a!forEach(
    items: folder(5, "documentChildren"),
    expression: a!map(
      id: document(fv!item, "id"),
      dateCreated: document(fv!item, "dateCreated")
    )
  ),
  local!maxDate: max(local!documents.dateCreated),
  displayvalue(
    local!maxDate,
    local!documents.dateCreated,
    local!documents.id,
    {}
  )
)

RE: Document in Folder

daniels9627 — Fri, 02 Feb 2024 16:07:26 GMT

Thanks All

I have done the Associated and Applied Developer courses, read through most of Stefan's book, and now going through the online resources/videos/tutorials and also trying my own apps, so I am on the road! (the Great Appian Way Road). So you will probably see me again posting questions!

Thanks again for your reply's!!

RE: Document in Folder

EREN_YEAGER — Fri, 02 Feb 2024 16:02:45 GMT

Certainly, I'm also uncertain, and I attempted to implement binary search in Appian using a recursive approach. Surprisingly, this consistently takes more time than a straightforward linear search. I'm puzzled by this because, as we understand, binary search typically has a time complexity of log(n), while linear search has a time complexity of O(n). Could it be attributed to calling an expression rule or passing substantial data through RI(s) multiple times?

and yes I'm gonna read that. Your blogs, as well as Harshit's blogs, are rich in information and contain sharp details.

RE: Document in Folder

Stefan Helzle — Fri, 02 Feb 2024 15:52:18 GMT

I am not sure whether a recursive approach is the best option for this. I wrote a blog post about how to implement more "complex" algorithms in Appian.

https://appian.rocks/2022/08/29/complex-algorithms-in-appian/

RE: Document in Folder

EREN_YEAGER — Fri, 02 Feb 2024 15:48:34 GMT

daniels9627 Thanks for confirming what you were looking for & If you are willing please hit 'Verify answer'.

RE: Document in Folder

EREN_YEAGER — Fri, 02 Feb 2024 15:45:25 GMT

Alternatively, you can adopt the method you outlined in the post using pseudo code. This approach enables you to obtain the maximum value of any type within an array with minimal adjustments.

a!localVariables(
  local!data: a!forEach(
    items: folder(6025, "documentChildren"),
    expression: document(fv!item, "dateCreated")
  ),
  rule!DCT_getMax(
    array: local!data,
    currentMax: property(local!data, 1, null),
    currentIndex: 1,
    lengthOfArray: length(local!data)
  )
)

code for DCT_getMax ->

if(
  ri!currentIndex > ri!lengthOfArray,
  ri!currentMax,
  rule!DCT_getMax(
    array: ri!array,
    currentMax: if(
      ri!currentMax > ri!array[ri!currentIndex],
      ri!currentMax,
      ri!array[ri!currentIndex]
    ),
    currentIndex: ri!currentIndex + 1,
    lengthOfArray: ri!lengthOfArray
  )
)

result ->

RE: Document in Folder

daniels9627 — Fri, 02 Feb 2024 15:41:01 GMT

Thanks Amaan, this worked, nice little trick. One step forward :😀

RE: Document in Folder

EREN_YEAGER — Fri, 02 Feb 2024 15:28:06 GMT

I don't know if this will work for you or not but as far as I've seen recent document will have greater document Id then previous ones, so here is the code for getting most recent uploaded document ->

max(
  a!forEach(
    items: folder(6025, "documentChildren"),
    expression: document(fv!item, "id"),
    
  ),
  
)

RE: Document in Folder

Stefan Helzle — Fri, 02 Feb 2024 15:10:59 GMT

Let me first ask my usual question. What do you want to achieve? We typically just dump documents to folders and store the required meta data to database. Then your question can be answered by a simple query.