tidyjson (version 0.2.2)

enter_object: Dive into a specific object "key"

Description

JSON can contain nested objects, such as "key1": "key2": [1, 2, 3]. The function enter_object() can be used to access the array nested under "key1" and "key2". After using enter_object(), all further tidyjson calls happen inside the referenced object (all other JSON data outside the object is discarded). If the object doesn't exist for a given row / index, then that data.frame row will be discarded.

Usage

enter_object(x, ...)

Arguments

x

a tbl_json object

...

path to filter

Details

This is useful when you want to limit your data to just information found in a specific key. Use the ... to specific a sequence of keys that you want to enter into. Keep in mind that any rows with JSON that do not contain the key will be discarded by this function.

Examples

library(magrittr)  # for %>%
c('{"name": "bob", "children": ["sally", "george"]}', '{"name": "anne"}') %>%
  spread_values(parent.name = jstring("name")) %>%
  enter_object("children") %>%
  gather_array %>%
  append_values_string("children")