Building data in the App
Typically the data that is passed into a teal
application is available before the app is run. However, this is not
always true and in some cases the data will be built only after the app
has started. A good example is pulling the data from an external
repository, like a database, or uploading a file. Additional
authentication may be required.
teal_data_module
Preprocessing actions can be performed in-app using the
teal_data_module. Rather than passing a
teal_data object to the app, one may pass a
shiny module that returns a
teal_data object (wrapped in a reactive expression). This
allows the app developer to include user actions data creation,
fetching, and even pre-filtering modification.
Further reading
A complete explanation of using the teal_data_module can
be found in this teal
vignette