Training Resources Changed to Topic Document Attachments

[dcollie2]

DESCRIPTION

The most recent requirements eliminate the need for Training Resources to be their own model. Instead, they will be has_many_attached on Topics. See the requirements for training resources.

This task will make the uploads work. The user interface specifics will need to be improved during a later user interface review.

Since the storage location depends on the topic's language, we are arbitrarily restricting the language from being changed once it is set. A separate task will address restoring the ability to change a topic's language.

Storage requirements were complex in an earlier version of the draft. They are much simpler now.

DEPENDENCIES

Dependent upon #71: Language Provides file_storage_prefix.

SUB TASKS

• Training Material documents (currently has_one_attached: document on Training Material) are has_many_attached: documents on Topics
• Testing is in place
• Update training resources removal task with notes for developers

[dcollie2]

@hernanvicente, I've updated the requirements and removed several things from this task. We no longer need to consider language when storing the documents. I've also removed the access restriction specification and will add that as a separate task.