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Asked: 2026-06-11T04:38:56+00:00

I’m a complete rails beginner and I’m trying to understand the full concepts. I’ve

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I’m a complete rails beginner and I’m trying to understand the full concepts. I’ve literally been trying to solve this problem for hours and I wanted to ask on here.

I would like to perform a JSON request to my rails app which runs on localhost. But I do not know if I am using a wrong type of JSON request software (I’m using CocoaRestClient for mac) or my code is incorrect.

I’ve observed that when I create a POST type JSON request in rails it is leaded to the create method. And what I am trying to achieve is to actually store multiple variables that I receive from JSON and later on show it on the page. I know it’s dead simple but it is really hard because I’ve tried a lot things.

My questions:

  1. I will be capturing the event on create method. How can I get a parameter from the JSON request. I’ve tried @username = params[:username] but it didn’t work out.
  2. If I ever get lucky enough to capture the parameters that is provided by the JSON in which page should I print them. I’ve tried to show on index or show pages but couldn’t manage that as well.
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1 Answer

  1. Editorial Team

    You have request variable that in fact is instance of ActionDispatch::Request class. Here you have #body method that return raw request body. So if you send JSON request in body you should parse it i.e.:

    data = JSON.parse request.body
data['username']

    And if you wanna display it you have 3 options:

    • render view in #create method what is a bad idea, because this method is only to save model to DB
    • save data to DB and display on next page
    • or use flash object and store it only to next request
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