Question

When I load up the Rails console in my project, I can do this:

{}.to_json

But I can’t do this:

"{}".from_json

Even when I require the json gem first, it doesn’t work. Does a from_json method even exist?

Answer 1

No. from_json does not exist. If you want to get a Ruby hash from a JSON string, you can use the JSON#parse method. Example below:

json = JSON.parse("{\"hello\": \"world\"}")

the above returns {"hello"=>"world"}