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thompsonp2
Advocate I
Advocate I

How do you change the initial trigger in a flow?

I created a flow based on a trigger if an item was added or modified from a sharepoint list.  I want to change this to just if one particular field is modified, but i don't know how to do that.  Is the only way to rebuild the flow from scratch?

20 REPLIES 20
Mike2500
Super User
Super User

1. You can change the trigger by deleting the original trigger and then simply adding a different one. Complicating this procedure is the fact that you can't delete the trigger if any other components are using fields from it. So, if you had an email action that used fields from the trigger, you'd have to remove those fields from the email before getting rid of the trigger.

 

2. There is no trigger to start a flow from modifying a particular field of a list. The old way of doing this is to have an extra field to store the older value, and then compare them. For example, if your field is "status", create a new field called "status_old". The flow would fire for every list change, and would compare those values. If the values were different, then it should proceed on, doing whatever it needed to do, and then update status_old with the current value in status.

So basically, you would have to remove everything in the flow in order to remove the first trigger - essentially rebuilding it.

I've accidentally created a loop by having the trigger be create or modify an item at the end of my flow I have it update to Yes, if an item is approved - hence triggering another round of emails.  I really need it to be if it is just changing one field.  Doesn't sound like the old way would work for me anymore since the trigger is modifying a list.  I guess I'll just turn off the flow to do a manual update for now.  Thanks for your input!

ch2017
Advocate IV
Advocate IV

in my case i had a long & complex workflow i din't want to recreate from scratch - especially since MS Flow kept complaining about dependencies between the trigger & actions that i could not find when i tried to remove the original trigger

 

so i found this workaround

  • export the workflow as a zip package (option "create as new")
  • make sure to rename the original workflow to avoid conflicts when importing
  • unzip the package file, look for the definition.json file
  • replace the trigger by editing the file:
    in case of a different trigger on the same connection it is rather straightforward, in my case i replaced "When_an_item_is_created" with "When_an_item_is_created_or_modified" , "GetOnNewItems" with "GetOnUpdatedItems" and "onnewitems" with "onupdateditems"
  • recreate the zipfile (make sure the Microsoft.Flow folder is in the root of the zip file)
  • reimport the package, the flow is now triggered by the new action

 

in case you have a different datasource the edit may be more complex, just create 2 small workflows, one with each trigger, export them and look for the differences in their JSON files to help you in the right direction

Hi Ch2017,

 

that is a great idea, just got the problem, that i can not export a package ....

 

image.png

 

Actually i do not understand why as I am logged in with my Admin Account with an e3 License. 

Is there an requirement for a special License?

 

 

in terms of license there is no reason you are not able to export

Jim_Bu
Frequent Visitor

This doesn't seem to work.  When I change "When_a_file_is_created_or_modified_(properties_only)" to "When_a_file_is_created_(properties_only)" I get an unknown error on import.

rr19
Regular Visitor

I have the same issue. When I try to import the package it just says "Something wnet wrong. Please try again later." Have you found a solution?

this still works, just tested the change from "when item is created" to "when item is created or updated", no problem to import and use the edited version, there is also no reason that it would'n work as the JSON implementation is the same as two years ago

i have the same error when i forget to put the Microsoft.Flow at the root of the ZIP, so check that requirement

Jim_Bu
Frequent Visitor

Is there some missing hidden step? I've literally done nothing more than extract the zip, change the single line, and rezipped directory.

if you drop the exports (original and modified version) somewhere to download i can check what is wrong, be aware that some files may contain usernames so maybe remove them first

@ch2017  please how do i put Microsoft.Flow at the root of the ZIP

just create a subfolder called Microsoft.Flow and ZIP the parent folder to match the folder structure of the export file

efialttes
Community Champion
Community Champion

Posted by mistake

Did I make your day? If so, mark my response as 'Solution' !!!

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Ario
Regular Visitor

Another workaround can be this:

create a dummy condition like 1=1 and put all your code into this condition(works as a wrapper, I don't know a better way of making a wrapper for your code,  there should be though), then copy it to the clipboard and paste it into a new flow that you created with the right trigger that you fancy. you need to fix the input of the actions that use the trigger output at the end, and tada!

Ario
Regular Visitor

an easier workaround is to copy the actions to clipboard and paste them into the new flow that you created with the right trigger. if there are many actions, I can suggest to create a wrapper to contain all your code, I normally do put everything into a always-true condition like 1=1, and this gives me more flexibility to move things around. I just copy the condition to clipboard and then can paste it in any other flow.

efialttes
Community Champion
Community Champion

@Ario 

Good point! An alternate wrapper is 'Scope' action block

Hope this helps

Did I make your day? If so, mark my response as 'Solution' !!!

También escribo sobre Power Automate en este Blog y en Twitter

CW
Post Prodigy
Post Prodigy

As per usual with msft, THIS IS NUTS!!!!

 

I'm not doing any packages or anytghing! I have a good idea, ALLOW THE FLOW TRIGGER TO BE CHANGED AT THE EXISTING TRIGGER!!! HELLLLLOOOOOOO MICROSOFT.

 

Yet another very very VERY simple issue "overlooked".

 

Aye yi yi yi yi. I don't beleive this company, every functionality is incomplete and useful, valuable, evertyday, mundane, expected functionality perennially "overlooked".

 

To perform a simple trigger change you have to go through all that rigamarole? But what if it's a Tuesday with a full moon? I suppose it wont work then. 

With any container, you need to push your variable declarations to the top level and copy them one by one.  So it helps, but could lead to omissions

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