flow that sends email: concatenate existing attachment items with an array of variables - is it possible?

Question

I have a flow, whose final step is to send an email. The attachments field/-s can be populated by specifying individual attachments, or by specifying an array of variables (in case the number of attachments cannot be known in advance). I am curious if I can achieve both - attach an array of variables along with individually specified attachments?

The reason why the individual attachments cannot go into the array is that they are of a different nature, and their source is also different. In my case, the individual attachments are word templates that have been filled at previous steps in the flow, while the array of attachments are pictures; these are taken from an SharePoint list, from its Attachments column, which in turn originated from the submission of Power Apps application.

Below is the kind of thing that I try to achieve: sort of appending an array of variables to already existing attachment items. Either of them (the individual items, or the array of variables) work OK, but they cannot go together, or at least, not the way I did it.

Answer 1

If your attachments variable ("array of variables" in your screenshot) also have exact same properties (Name & ContentBytes), then follow below steps:

1. Create another array for your "individual attachments"
2. Combine both arrays together using union() function
3. Use output of union in send an email - attachments action

Example: I am showing you how to create two array variables and combine them together - you can use similar logic for your requirements:

Here's the complete flow:

Expression used in "Compose" action:

@{union(variables('varArray1'),variables('varArray2'))}

Output: