json-key-from-value |

If you often have big, unwieldy blobs of JSON which you have very deep trees in, it can be a pain to go from a value that you know is the field you want to retrieve to actually producing the correct selector.

json-key-from-value will, given some JSON and a value to find, tell you how to select it. If multiple keys or indexes are possible, they will all be printed.

Usage

For example, given the following JSON:

{"data":[{"foo":[
    {"bar":[
        {"id":1,"name":"yes"},
        {"id":2,"name":"no"}
    ]},
    {"baz":[
        {"id":2,"name":null}
    ]}]
},{"qux":[
    {"quux":
        [[1,42],[2,2],[true, false]]
    }]
}]}

% json-key-from-value yes < json
["data"][0]["foo"][0]["bar"][0]["name"]

% json-key-from-value 2 < json
["data"][0]["foo"][0]["bar"][1]["id"]
["data"][0]["foo"][1]["baz"][0]["id"]
["data"][1]["qux"][0]["quux"][1][0]
["data"][1]["qux"][0]["quux"][1][1]

% json-key-from-value true < json
["data"][1]["qux"][0]["quux"][2][0]

% json-key-from-value null < json
["data"][0]["foo"][1]["baz"][0]["name"]

Installation

cargo install json-key-from-value