This library builds a JSON Path field mapping string from an object structure. It relies on the reflect library to perform its duties. If this is a problem, I'd suggest skipping this library.

The purpose is to take an arbitrary data structure and turn it into a json representation that toggles fields based on having a 1 value. It will ignore "untagged" json fields and it will create subchild mappings of substructures using recursion (I know, sorry).

go get -u github.com/ericsalerno/gojsonfieldmap

Create an object struct you'd like to use:

type simpleObject struct {
    Name  string `json:"Name"`
    Value string `json:"Value"`
}

Run the one function this package provides on it:

object := simpleObject{}
output := gojsonfieldmap.GetJSONObjectFieldMap(object)

if output != `{"Name":1,"Value":1}` {
	fmt.Println("Something has gone wrong because this should work.")
}

Output will become the "field mapping" JSON equivilent of the input structure. See the main_test.go file for more complex examples.