redcap_metadata_read function

Export the metadata of a REDCap project

Export the metadata (as a data dictionary) of a REDCap project as a tibble::tibble(). Each row in the data dictionary corresponds to one field in the project's dataset.

redcap_metadata_read(
  redcap_uri,
  token,
  forms = NULL,
  fields = NULL,
  verbose = TRUE,
  config_options = NULL,
  handle_httr = NULL
)

Arguments

• redcap_uri: The uri/url of the REDCap server typically formatted as "https://server.org/apps/redcap/api/". Required.
• token: The user-specific string that serves as the password for a project. Required.
• forms: An array, where each element corresponds to the REDCap form of the desired fields. Optional.
• fields: An array, where each element corresponds to a desired project field. Optional.
• verbose: A boolean value indicating if messages should be printed to the R console during the operation. The verbose output might contain sensitive information (e.g. PHI), so turn this off if the output might be visible somewhere public. Optional.
• config_options: A list of options passed to httr::POST(). See details at httr::httr_options(). Optional.
• handle_httr: The value passed to the handle parameter of httr::POST(). This is useful for only unconventional authentication approaches. It should be NULL for most institutions. Optional.

Returns

Currently, a list is returned with the following elements:

• data: An R tibble::tibble() of the desired fields (as rows).
• success: A boolean value indicating if the operation was apparently successful.
• status_codes: A collection of http status codes, separated by semicolons. There is one code for each batch attempted.
• outcome_messages: A collection of human readable strings indicating the operations' semicolons. There is one code for each batch attempted. In an unsuccessful operation, it should contain diagnostic information.
• forms_collapsed: The desired records IDs, collapsed into a single string, separated by commas.
• fields_collapsed: The desired field names, collapsed into a single string, separated by commas.
• elapsed_seconds: The duration of the function.

Examples

## Not run:

uri   <- "https://redcap-dev-2.ouhsc.edu/redcap/api/"

# A simple project
token <- "9A068C425B1341D69E83064A2D273A70" # simple
REDCapR::redcap_metadata_read(redcap_uri=uri, token=token)

# A longitudinal project
token <- "0434F0E9CF53ED0587847AB6E51DE762" # longitudinal
REDCapR::redcap_metadata_read(redcap_uri=uri, token=token)

# A repeating measures
token <- "77842BD8C18D3408819A21DD0154CCF4" # vignette-repeating
REDCapR::redcap_metadata_read(redcap_uri=uri, token=token)
## End(Not run)

References

The official documentation can be found on the 'API Help Page' and 'API Examples' pages on the REDCap wiki (i.e., https://community.projectredcap.org/articles/456/api-documentation.html and https://community.projectredcap.org/articles/462/api-examples.html). If you do not have an account for the wiki, please ask your campus REDCap administrator to send you the static material.

Author(s)

Will Beasley