Write Web call for iphone in ruby on rail. I want to get json formate and send response but formate of json is incorrect - iphone

Question

I have a bug in the following Rails code which I cannot find. Any help would be appreciated.
class Api::ItemsController < ApplicationController
respond_to :json
def create
begin
#puts "params: #{params}"
if params[:item_post][:user][:uid] && params[:item_post][:user][:provider]
#user = User.find_by_provider_and_uid(params[:item_post][:user][:provider], params[:item_post][:user][:uid])
elsif params[:item_post][:user][:token]
#user = User.create_with_token(params[:item_post][:user][:token])
elsif params[:item_post][:user][:email]
#user = User.find_by_email(params[:item_post][:user][:email])
end
if #user
#item = #user.items.new(params[:item_post][:item])
else
#item = Item.new(params[:item_post][:item])
#item.reply_email = params[:item_post][:user][:email]
end
if #item.save
if params[:item_post][:item_images]
params[:item_post][:item_images].each_value do |item_image|
#item.images.create(item_image)
end
end
respond_with(#item)
else
#puts "Errors 1: #{#item.errors}"
respond_with(#item.errors)
end
rescue => e
#puts "Errors 2: #{e.message}"
respond_with(e.message.to_json, :status => :unprocessable_entity)
end
end
end
Problem:
I have been looking into the parameters received by the server. And I've tried to find the code where the parameters are built. Where can I find it?
In the server logs I can see the post as:
{"item_post":"{\"item\":{\"title\":\"Apple TV\",\"price\":\"45.50\",\"description\":\"Dual-Shielded High Speed HDMI Cable with Ethernet 2M are sold yesterday\",\"zipcode\":\"94102\"},\"user\":{\"email\":\"user#email.com\"}}}
I was expecting the post to look like this:
{\"item_post\":{\"item\":{\"title\":\"Apple TV\",\"price\":\"45.50\",\"description\":\"Dual-Shielded High Speed HDMI Cable with Ethernet 2M are sold yesterday\",\"zipcode\":\"94102\"},\"user\":{\"email\":\"user#email.com\"}}}
It seems to me that the 'item_post' block is being wrapped in unnecessary quotes, making it a string instead of a JSON hash:
I think this:
{"item_post":"{
should look like (no quote) this:
{"item_post":{
I am only guessing to what the problem could be.

Answer 1

I think you need avoid the to_json in your rescue
respond_with(e.message.to_json, :status => :unprocessable_entity)
put
respond_with(e.message, :status => :unprocessable_entity)
In your case the to_json before the to_json in the respond_with return a String it's why you have a String convert in JSON and not your Hash convert in JSON