Fetching data from JSON containing an array

Question

I have the following piece of JSON returned to a Ruby RestClient post request:

{"importResults":[{"status":"success","id":"ed2a89538d84eff5b92b5baad1fb5a4e"}]}

I am trying to retrieve the status (success) and the id (ed2a89538d84eff5b92b5baad1fb5a4e).

I tried the following code:

jdoc = JSON.parse(jsonAbove)
status = jdoc.fetch("importResults").fetch("status")

This is giving me back the error TypeError: can't convert String into Integer.

I know it's because there is an array in the response that I'm getting this error but I can't seem to get it right.

Sergio Tulentsev · Accepted Answer · 2012-05-18 16:56:21Z

4

As many others have already said, you need first in your request.

status = jdoc.fetch("importResults").first.fetch("status")

It looks like you are new to this. I would suggest using irb to mess around with things. For example, you could type s = jdoc.fetch("importResults") and look at the result. You can then play around with the s variable in the console and see what works. s.first, s.class, s[0] etc.

edited May 18, 2012 at 16:56

Sergio Tulentsev

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answered May 18, 2012 at 16:51

Kyle Heironimus

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mikdiet · Accepted Answer · 2012-05-18 16:51:16Z

3

You need

status = jdoc.fetch("importResults").first.fetch("status")

answered May 18, 2012 at 16:51

mikdiet

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Comments

Sergio Tulentsev · Accepted Answer · 2012-05-18 16:50:14Z

3

Right, so it is an array. Get its first (or another appropriate) element and proceed.

status = jdoc.fetch("importResults").first.fetch("status")
#                                      ^^

answered May 18, 2012 at 16:50

Sergio Tulentsev

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1 Comment

Matt Huggins Over a year ago

Upvoted yours since you were first to answer, though I tried to provide alternate syntax. :)

Matt Huggins · Accepted Answer · 2012-05-18 16:51:07Z

3

That's because you need to get the first item from the array. Change this:

status = jdoc["importResults"].first["status"]

Alternatively:

status = jdoc["importResults"][0]["status"]

answered May 18, 2012 at 16:51

Matt Huggins

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