primary_keys {cohortBuilder}

Define Source datasets primary keys

Description

Primary keys can be defined as 'primary_keys' parameter of set_source method. Currently, primary keys are used only to show keys information in attrition plot (See attrition).

Usage

primary_keys(...)

Arguments

...

Data keys describing tables primary keys.

Value

List of class 'primary_keys' storing data_keys objects.

Examples

primary_keys(
  data_key('books', 'book_id'),
  data_key('borrowed', c('user_id', 'books_id', 'date'))
)