Upload attachments to custom object from Ajax
I have a custom object with file attachments activated. I checked the metadata and the methods and properties for file attachments are exposed. I have a form with all the data that must be saved for that custom object. Some of those fields are "upload documents", but for now I only have one:
<rn:widget path="input/FileAttachmentUpload2" label_input="Upload""/>
This form has a submit form widget that extends the standard one and calls to a custom Ajax controller that saves the custom object. There I'm trying to save the attachment. If I write a file there, the custom object is saved, but if I try to save the file uploaded with the "input/FileAttachmentUpload2" widget, I'm getting an error. How can I check that the file is in the tmp folder? Am I doing something wrong?