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Split modulestore persists data in three MongoDB "collections": course_index (list of courses and the current version of each), structure (outline of the courses, and some XBlock fields), and definition (other XBlock fields). While "structure" and "definition" data can get very large, which is one of the reasons MongoDB was chosen for modulestore, the course index data is very small. By moving course index data to MySQL / a django model, we get these advantages: * Full history of changes to the course index data is now preserved * Includes a django admin view to inspect the list of courses and libraries * It's much easier to "reset" a corrupted course to a known working state, by using the simple-history revert tools from the django admin. * The remaining MongoDB collections (structure and definition) are essentially just used as key-value stores of large JSON data structures. This paves the way for future changes that allow migrating courses one at a time from MongoDB to S3, and thus eliminating any use of MongoDB by split modulestore, simplifying the stack.
Status: Active Responsibilities ================ The user_api app is currently a catch all that is used to provide various apis that are related to the user and also to features within the platform. Intended responsibility: To manage user profile and general account information and to provide APIs to do so easily. This includes the following features: user preference, user profile, user retirement, and account activation/deactivation. Direction: Decompose =============== Currently this app is a catch all for many user related information even when that information should really belong in a different app. If you are building a feature and need to provide information about a user within the context of your feature, you should localize that API to your feature and make your assumptions about what user information you need clear. For example authentication related APIs have already been moved to the user_authn django app. Glossary ======== More Documentation ==================