[Experimental]

form_schema_ext(
  flatten = FALSE,
  odata = FALSE,
  parse = TRUE,
  pid = get_default_pid(),
  fid = get_default_fid(),
  url = get_default_url(),
  un = get_default_un(),
  pw = get_default_pw(),
  odkc_version = get_default_odkc_version(),
  retries = get_retries(),
  verbose = get_ru_verbose()
)

Arguments

flatten

Whether to flatten the resulting list of lists (TRUE) or not (FALSE, default). Only applies to ODK Central version < 0.8.

odata

Whether to sanitise the field names to match the way they will be outputted for OData. While the original field names as given in the XForms definition may be used as-is for CSV output, OData has some restrictions related to the domain-qualified identifier syntax it uses. Only applies to ODK Central version < 0.8. Default: FALSE.

parse

Whether to parse the form schema into a tibble of form field type and name. This uses form_schema_parse internally. If used together with flatten=TRUE, form_schema will raise a warning and return the unparsed, flattened form schema. Only applies to ODK Central version < 0.8. Default: TRUE.

pid

The numeric ID of the project, e.g.: 2.

Default: get_default_pid.

Set default pid through ru_setup(pid="...").

See vignette("Setup", package = "ruODK").

fid

The alphanumeric form ID, e.g. "build_Spotlighting-0-8_1559885147".

Default: get_default_fid.

Set default fid through ru_setup(fid="...").

See vignette("Setup", package = "ruODK").

url

The ODK Central base URL without trailing slash.

Default: get_default_url.

Set default url through ru_setup(url="...").

See vignette("Setup", package = "ruODK").

un

The ODK Central username (an email address). Default: get_default_un. Set default un through ru_setup(un="..."). See vignette("Setup", package = "ruODK").

pw

The ODK Central password. Default: get_default_pw. Set default pw through ru_setup(pw="..."). See vignette("Setup", package = "ruODK").

odkc_version

The ODK Central version as decimal number (major.minor). ruODK uses this parameter to adjust for breaking changes in ODK Central.

Default: get_default_odkc_version or 1.1 if unset.

Set default get_default_odkc_version through ru_setup(odkc_version=1.1).

See vignette("Setup", package = "ruODK").

retries

The number of attempts to retrieve a web resource.

This parameter is given to RETRY(times = retries).

Default: 3.

verbose

Whether to display debug messages or not.

Read vignette("setup", package = "ruODK") to learn how ruODK's verbosity can be set globally or per function.

Value

A tibble containing the form definition. For ODK Central 0.8, and with default parameters (parse=TRUE) for ODK Central 0.7, form_schema returns a tibble with the columns:

  • name The field name as given in the form schema.

  • type The field type, e.g. "string", "select1", etc.

  • path The XForms path of the field,

  • ruodk_name The predicted field name as generated by odata_submission_get, prefixed by the path, additionally cleaned with make_clean_names to match the cleaned column names from odata_submission_rectangle.

  • label The field label as given in the form schema. If specific languages are available, this column will return the default language or it will be empty if this is not specified.

  • label_lang The field label in languange _lang as given in the form schema.

  • choices A list of lists containing at least values and, if available, labels of the choices as given in the form schema. If specific languages are available, this column will return the default language or it will be empty if this is not specified. Please notice that whenever choice filters are applied, this will return the unfiltered choice list.

  • choices_lang A list of lists containing at least values and, if available, labels of the choices in language _lang as given in the form schema. Please notice that whenever choice filters are applied, this will return the unfiltered choice list.

Details

ODK Central has introduced a new API endpoint in version 0.8 which returns a parsed and flattened list of fields. This replaces the nested form schema which is challenging to parse. This list is returned by form_schema.

However this still misses important elements, in particular labels and choice_lists.

form_schema_ext returns the same object as form_schema adding labels and choice lists in all languages available. This is done by using the return object from form_xml.

It has the exact function signature as form_schema. In that sense, any call to form_schema can be replaced by form_schema_ext

This function, however, has been prepared with ODK Central version 0.8 or higher. If you use it with an earlier version, a warning will be given.

See also

Examples

if (FALSE) { # See vignette("setup") for setup and authentication options # ruODK::ru_setup(svc = "....svc", un = "[email protected]", pw = "...") # With current ODK Central (>0.7) # get extended schema: fsx <- form_schema_ext() # print choice list in english: fsx[fsx$name == "test_yn", "choices_english_(en)"][[1]] # view the extended schema: fsx }