assert_no_duplicate {EDCimport}

Assert that a dataset has one row per patient

Description

Check that there is no duplicate on the column holding patient ID in a pipeable style.
Mostly useful after joining two datasets.

Usage

assert_no_duplicate(df, id_col = get_key_cols())

Arguments

df

the dataset

id_col

(optional) the name of the columns holding patient ID

Value

the df dataset, unchanged

Examples

#without duplicate => no error, continue the pipeline
tibble(subjid=c(1:10)) %>% assert_no_duplicate() %>% nrow()

#with duplicate => throws an error
#tibble(subjid=c(1:10, 1:2)) %>% assert_no_duplicate() %>% nrow()