How to parse the json data or (json code) from Ruby on rails

Question

I have an Ruby on rails source,code now i want to parse the data, and send the data.In my code,it will fetches the name from user and display it,How to parse the data in ROR.

This is my controller.rb code

def index
    @hotels = Hotel.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @hotels }
    end
  end

  # GET /hotels/1
  # GET /hotels/1.json
  def show
    @hotel = Hotel.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @hotel }
    end
  end

  # GET /hotels/new
  # GET /hotels/new.json
  def new
    @hotel = Hotel.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @hotel }
    end
  end

  # GET /hotels/1/edit
  def edit
    @hotel = Hotel.find(params[:id])
  end

  # POST /hotels
  # POST /hotels.json
  def create
    @hotel = Hotel.new(params[:hotel])

    respond_to do |format|
      if @hotel.save
        format.html { redirect_to @hotel, notice: 'Hotel was successfully created.' }
        format.json { render json: @hotel, status: :created, location: @hotel }
      else
        format.html { render action: "new" }
        format.json { render json: @hotel.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /hotels/1
  # PUT /hotels/1.json
  def update
    @hotel = Hotel.find(params[:id])

    respond_to do |format|
      if @hotel.update_attributes(params[:hotel])
        format.html { redirect_to @hotel, notice: 'Hotel was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @hotel.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /hotels/1
  # DELETE /hotels/1.json
  def destroy
    @hotel = Hotel.find(params[:id])
    @hotel.destroy

    respond_to do |format|
      format.html { redirect_to hotels_url }
      format.json { head :no_content }
    end
  end

How to parse these data in ROR using Json HOw to write parsing json file for these data,how to do that one

score 2 · Answer 1 · answered May 10 '13 at 07:12

    **Answer of my question**

This part we have to do in controller hotelscontroller.erb

  respond_to :json, :xml
      def index
        @hotels = Hotel.all

        respond_to do |format|
          format.html # show.html.erb
          format.json { render json: @hotels.to_json(:only => [ :id, :name ]) }
        end
      end

view/index.json.erb

[
  <% @hotels.each do |hotel| %>
    { 'id': <%= hotel.id %>, 'name': "<%= hotel.name %>" },
  <% end %>
]

routes.rb

get 'hotels' => 'hotels#index', :as => 'hotels'

Ramiz Raja · Answer 2 · 2013-05-09T13:02:21.323

1

You can covert a hash to json by to_json method. For reference please see http://apidock.com/rails/ActiveRecord/Serialization/to_json

for example, if you want to write all hotels to external file.

file = File.open("hotels.txt", "w")
file.puts Hotel.all.to_json
file.close

this will write all hotels in external file hotels.txt

edited May 09 '13 at 13:02

answered May 09 '13 at 12:16

Ramiz Raja

5,942
3
27
39

Dude could you give your answer,how to write the json file for my controller.I am new to json,give me answer for my question – Jitendra Patidar May 09 '13 at 12:21
I want to get the data from the user,that what in my code,its a scaffolding.how to parse the data,which user providing – Jitendra Patidar May 09 '13 at 12:25
could you provide solution for me @Ramiz Raja – Jitendra Patidar May 09 '13 at 12:37
Do you want to write json version of user object to an external file? – Ramiz Raja May 09 '13 at 12:44
Do you want to write json version of user object to an external file? – Ramiz Raja May 09 '13 at 12:44
yes,i want how to write json file for the above code,thats what i need dude – Jitendra Patidar May 09 '13 at 12:45
This is for server side. File will be saved on server machine, not client. – Ramiz Raja May 09 '13 at 13:18
ya actually i also dont need client one,i will show u one example http://stackoverflow.com/questions/8143174/whats-the-best-way-to-parse-json-in-ruby-on-rails , if u see link,there will controller and json also like that we need – Jitendra Patidar May 09 '13 at 13:23

Hauleth · Accepted Answer · 2013-05-09T14:25:11.250

1

There are many ways:

Create method to_json for each model

Create view named, i.e. hotels/index.json.erb and write JSON code using ERb templating engine

[
  <% @hotels.each do |hotel| %>
    { 'id': <%= hotel.id %>, 'name': "<%= hotel.name %>" },
  <% end %>
]

Use library like jbuilder (on the bottom of page is list of alternatives to JBuilder)

# hotels/index.json.jbuilder
json.array!(@hotels) do |hotel|
  json.id hotel.id
  json.name hotel.name
end

edited May 09 '13 at 14:25

answered May 09 '13 at 12:24

Hauleth

22,873
4
61
112

could you provide answer for my solution,i am new to one, – Jitendra Patidar May 09 '13 at 12:27
How to write json file for the above controller,could you give the solution – Jitendra Patidar May 09 '13 at 12:46
Dude this answer is enough or not? – Jitendra Patidar May 10 '13 at 05:15
http://stackoverflow.com/questions/16735851/how-to-use-post-method-in-ror-using-json – Jitendra Patidar May 25 '13 at 05:09

How to parse the json data or (json code) from Ruby on rails

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