MS Graph: Send email with attachment

Question

We are trying to send emails with attachments using the MS Graph sendMail API. 
 We're seeing an issue where the document is not being converted to Base64, see screenshot below. 
 Is the issue that we're starting with a json and converting to dictionary? This was done because if we define the dictionary directly, the key "@odata.type" is not recognised properly because of the period. 
 
 Thanks!

Jesús Hormigos · Accepted Answer

Use the following code in your "attachments" attribute 
 
 "attachments": {
 if(
 a!isNullOrEmpty(ri!attached),
 {},
 a!forEach(
 items: ri!attached,
 expression: {
 "@odata.type": "#microsoft.graph.fileAttachment",
 "name": concat(
 document(fv!item, "name"),
 ".",
 document(fv!item, "extension")
 ),
 "contentType": concat(
 "application/",
 document(fv!item, "extension")
 ),
 "contentBytes": fv!item
 }
 )
 )
 }

Stefan Helzle · Answer

You tried to create a JSON string using text operations. Then the reference to the document turns into "[Document:xx]". Now, you try to turn this into a dictionary. How should Appian know what you are referring to?

MS Graph: Send email with attachment

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