portal_search: fetch datasets on a portal
In Tutuchan/fodr: Interact with French open data services

Description Arguments Details Examples

This method is used to retrieve datasets from a portal.

`nrows`	an integer, indicates the number of records to fetch (defaults to NULL, i.e. all matching records are fetched)
`refine`	a named list
`exclude`	a named list
`sort`	a character
`q`	a character, used to do full-text search
`lang`	a character, the language used in the `q` parameter
`theme`	a character, one of the themes of the portal

refine and exclude, if set, must be named lists where the names are the facets to use and the values of the list, the values to pick or exclude.

sort takes a character in the sortables element of the portal object and sorts the results according to its value. Add a - in front in order to sort in descending order (e.g. sort = "-commune").

q is used to perform a full text-search in all elements of the dataset. To search for all datasets containing the word "Paris", use q = "Paris". See here for more information.

lang can be set to use language-specific functions on the elements passed to the q parameter but is not implemented yet.

theme can be set to filter only datasets with a specific theme.