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I have a json response like this:

@response = {"result":{"amount":0.0}}

How can I get the value of amount into a variable?

I've tried:

@response['result']['amount']
@response['result'][0] 
@response[0][0]

I'm using the json gem.

nickgryg
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Brook Tester
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  • I get syntax error with this `@response = {"result":{"amount":0.0}}` – Jagdeep Singh Dec 14 '17 at 11:16
  • You can indeed use bracket notation `[]` to access values from a json response. Just check all the available keys that can be passed into `[]` by calling `@response.keys`. – Jagdeep Singh Dec 14 '17 at 11:17

2 Answers2

1

Try this 

@response[:result][:amount]

the keys in @response object are :symbols not strings

For more info: What's the difference between a string and a symbol in Ruby?

Abdullah
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1

With nested Hashes Ruby's Hash#dig method is very handy since it is returning nil if any intermediate step is nil.

@response.dig(:result, :amount)

If you are not sure is the key string or symbol you can use ActiveSupport::HashWithIndifferentAccess that provides Hash#with_indifferent_access (Rails will include this by default). Then you can get the value with both symbol and string formatted key.

Lauri
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