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N
nickk1385
May 2, 2024
Question

How to check if documents exist?

  • May 2, 2024
  • 15 replies
  • 3 views

Hi there, I am trying to create an expression rule that returns true if a document is not null, and has an ID attached to it. The expression rule is used to determine an XOR node to go to the document deletion node to delete the document if it exists, or to move to the end node if it has already been deleted. Right now, I am using a plugin isObjectExists() and it does work correctly but my supervisor wants me to improve the code to not use that plugin, any ideas for what to do?

Here is the expression rule I created, it currently works how I want it to but I want to avoid using the plugin, any help is appreciated!

    15 replies

    mathieud0001
    mathieud0001
    May 2, 2024

    Multiple threads on this topic:

      N
      nickk1385Author
      May 3, 2024

      So those also suggest a plugin which I cannot do.

      mathieud0001
      mathieud0001
      May 4, 2024

      You have no plugins installed in your environment?

      Content Tools is a pretty common one.

      vinaykumarp8308
      vinaykumarp8308
      Participating Frequently
      May 5, 2024

      Hello [mention:e86cecfa115d423c935017f8e2db6dd4:e9ed411860ed4f2ba0265705b8793d05] ,

      You can use getcontentobjectdetailsbyid() function to check if the document exists or not.

      If it does not exists, you would see "No object with this ID has been found" as an output.

      csteward
      csteward
      May 7, 2024

      In my experience, simple works for me - my checks only convert the document object to string which equals "[Document:]" for nulls.  Have not had any issues with this yet.

      or(
  rule!APN_isEmpty(ri!doc),
  tostring(ri!doc)="[Document:]"
)

      mikes0011
      mikes0011
      Brainy
      May 7, 2024

      but what if a nonsense ID is passed in?  wouldn't it still render the same, and return a fake result?

      (This would also apply when a document has already been deleted, but the process instance is still passing around references to its ID, as far as I know.)

      csteward
      csteward
      May 8, 2024

      In those situations, I seem to have issues in other areas first - such as when a document is stored in a PV, but it is deleted via Related Action and the PV is not updated/cleared - I get forms not loading at all, etc (if they reference the document). 

      Expression evaluation error [evaluation ID = TPWUJ] in rule 'form_xyz' at function a!fileUploadField_17r1 [line 142]: Invalid Content ID

      The string check isn't perfect, but has worked for all my use cases so far [emoticon:c4563cd7d5574777a71c318021cbbcc8]

      davidj137213
      davidj137213
      Brainy
      May 7, 2024

      Is an option to create your own plugin?

      Anyway , in the post you can find different options to handle this case.

      shanmathip7466
      shanmathip7466
      Inspiring
      September 12, 2024

      Hi,

      This is working but not sure whether this is good approach. Please give you thoughts. [mention:a11f77a729fb4db2af76b09948583328:e9ed411860ed4f2ba0265705b8793d05] 

      not(
      rule!CSCM_CheckIsNullOrEmpty(
      value: index(
      index(
      a!documentViewerField(document: ri!document),
      "contents",
      null
      ),
      "documentUrl",
      null
      )
      )
      )

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