Azure Data Factory V2 Dynamic Content - azure

Question

Long story short, I have a data dump that is too large for an azure function. So we are using Data Factory.
I have tasked another function to generate an access token for an API and output it as part of a json. I would like to set that token to a variable within the pipeline. So far I have this:
I'm attempting to use the Dynamic Content "language" to set the variable:
#activity('Get_Token').output
I'd like something like pythons:
token = data.get('data', {}).get('access_token', '')
As a secondary question, my next step is to use this token to call an API while iterating over another output, so perhaps this exact step can be added into the ForEach?

Answer 1

Looks like the variable should be #activity('Get token').output.data.access_token as others have indicated but, as you've guessed, there's no need to assign a variable if you only need it within the foreach. You can access any predecessor output from that successor activity. Here's how to use the token while iterating over another output:
Let's say your function also outputs listOfThings as an array
within the data key. Then you can set the foreach activity to
iterate over #activity('Get token').output.data.listOfThings.
Inside the foreach you will have (let's say) a Copy activity with a
REST dataset as the source. Configure the REST linked service
with anonymous auth ...
... then you'll find a field called Additional
Headers in the REST dataset where you can create a key Authorization
with value as above, Basic #activity('Get token').output.data.access_token
The thing that you said you want to iterate over (in the listOfThings JSON array) can be referenced inside the foreach activity with
#item() (or, if it's a member of an item in the listOfThings
iterable then it would be #item().myMember)
To make #4 explicit for anyone else arriving here:
If listOfThings looks like this, listOfThings: [ "thing1", "thing2", ...]
for example, filenames: ["file1.txt", "file2.txt", ...]
then #item() becomes file1.txt etc.
whereas
If listOfThings looks like this, listOfThings: [ {"key1":"value1", "key2":"value2" ... }, {"key1":"value1", "key2":"value2" ... }, ...]
for example. filenames: [ {"folder":"folder1", "filename":"file1.txt"}, {"folder":"folder2", "filename":"file2.txt"}, ... ]
then #item().filename becomes file1.txt etc.