Defaults for Nil Case

[tidwall]

Defaults for Nil Case

[tidwall]

Thanks and I'm happy to hear that you find the library useful.

The default gjson.Result{} value currently represents a non-existent json member. You can use the result.Exists() function to see if the member exists, and if it does you can use if result.Type == gjson.Null to check if the value is null of something else.

Here's some examples:

result := gjson.Get(`{"first":"Jane","last":"Austen"}`, "last")
println(result.Exists())  // true
println(result.Type)      // gjson.String

result := gjson.Get(`{"first":"Jane","last":null}`, "last")
println(result.Exists())  // true
println(result.Type)      // gjson.Null

result := gjson.Get(`{"first":"Jane"}`, "last")
println(result.Exists())  // false
println(result.Type)      // gjson.Null

[svperfecta]

Thanks @tidwall In hindsight, this was kind of a silly request. I'll just wrap this up in a function on our end. Ideally I'd like it to work like:

result, err := gjson.GetWithDefault(`{"first":"Jane","last":null}`, "last", "foo")
println(err)  // nil
println(result.Exists())  // true
println(result.Type)      // gjson.String
println(result)      // "foo"

result, err := gjson.GetWithDefault(`{"first":"Jane"}`, "last", "foo")
println(err)  // NoValueError
println(result.Exists())  // false
println(result.Type)      // gjson.String
println(result)      // "foo"

Note: Not sure exactly how we'd handle err. This is admittedly a little gross.
We use this to parse JSON, and we often find edge cases with missing data, or things we didn't understand. We'd like to be able to default basically everything to a known JSON string, and have it be parsed like it existed.

[tidwall]

Not a silly request at all. I think your solution to wrap it in a function is a good one.