string to json after getting value from redis ruby - ruby-on-rails

Question

I created a simple json object something like this:
a = {"b": 1, "c": 2}
Setting the json object as value in redis like this:
LocalCache.set('abc', a)
After getting the value from redis, I am getting a string value:
x = LocalCache.get('abc')
I want this string to be converted back to JSON object but I am unable to do it.
When I tried x.as_json, I am getting "{:b=>1, :c=>2}"
When I tried x.to_json, I am getting "\"{:b=\\u003e1, :c=\\u003e2}\""
When I tried JSON.parse(x), I am getting this error:
JSON::ParserError: 785: unexpected token at '{:b=>1, :c=>2}'
Any help would be highly appreciated.

Answer 1

"{:b=>1, :c=>2}"
Is not valid json. It's a ruby hash. Cast it to json before cache-ing it and then parse it after you retrieve it.
LocalCache.set('abc', a.to_json)
x = LocalCache.get('abc')
JSON.parse(x)

Answer 2

From Redis documentation: https://github.com/redis/redis-rb#storing-objects
Redis stores only strings as values. You have to serialize the value you are setting to as json and then parse it back as JSON after retrieving.
a = {"b": 1, "c": 2}
Here a is object of class Hash. Hence serialize while storing
x = LocalCache.set("abc", a.to_json)
To retrieve: x = JSON.parse LocalCache.get('abc')
p x # {"b"=>1, "c"=>2}