json - uninitialized constant Api in Rails app -

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IVE created a controller named People Controller:

To guide some guide pointers of this guide Trying:

/ P> 

  module API module V1 category public controller & lt; ApplicationController Def Salutation: json = & gt; {Message: "Hello World!"} In this controller there is a simple Hello method, which is called Hello world when it is called Jason  
 My Way:  
  Rail Application Routes. Draw Namespace: API, Default: {format: 'json'} Place name: get v1 "/ Hello" = & gt; "People #happy", like: & gt; 'Hello' and end   
 So if I call this URL then I should get Jason response: /api/v1/greet.json But instead I get the unrefined continuous API I am doing, and about 4 hours of struggle, I can not really know what I did wrong.  
 What is this that I have done wrong?   
 
 Eager_load in your config / environment / development.rb  
  config = True

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