I’ve just noticed something different. When updating or adding activities to a deal via the API, if I don’t set the active_flag to true, the activity is added, then disappears.
Looking at it, it seems this is used to flag an activity as deleted.
I’m sure this wan’t happening when I first started using this endpoint.
I’ve now updated by code, but just posting here in case anyone else has discovered this, or wasn’t aware of it.
Hi @micahsdad1402,
It sounds a bit strange… So you’re trying to add the activity, it’s added and then it disappears?
What endpoint are you using exactly? With what parameters?
I’m using https://api.pipedrive.com/v1/activities
bascially, if I include the parameter active_flag=true it works. If I don’t include this parameter it does the odd behaviour.
This definitely is different to when I first wrote the code. I’ve had no clients report this issue, and I just noticed it myself going through some testing for a new release. I then checked my previous version, and it did the same thing.
So it’s clearly a change to the way the endpoint works. No documentation on this, so I thought I’d just share it here in case anyone else has the same issue.
When I use the API Reference, it creates the activity with active_flag set as true. So it could be an issue with how restsharp serialises the c# class that is causing this.
I’m using c# with restsharp.dll
I suspect it might be something on your side.
I just double-checked and everything seems ok, meaning that if I don’t pass active_flag, it’s automatically set to true.
If you have the time, you could verify yourself using Postman or a similar tool, to exclude your libraries and code.
Let me know how it goes if you do 
I’ve got it working and very busy at the moment. There are at least three or four layers of dlls to create a post, so trying to duplicate this would take too much time, especially when I have a simple solution of just setting the flag to true.
Thanks for the contributions.