Storing voting results

Data persistence with YAML Store

So far we have played with static dummy data.

Let’s store the voting result and update the count whenever we vote for the specific dish.

Adding YAML Store library

Add following code at the top of voting.rb file:

require 'yaml/store'

Update cast and result route handlers

Now, update the post '/cast' and get /results handlers as below:

post '/cast' do
  @title = 'Thanks for casting your vote!'
  @vote  = params['vote']

  # create a votes.yml file and update the particular votes
  @store = YAML::Store.new 'votes.yml'
  @store.transaction do
    @store['votes'] ||= {}
    @store['votes'][@vote] ||= 0
    @store['votes'][@vote] += 1
  end
  erb :cast
end

get '/results' do
  @title = 'Results so far:'
  @store = YAML::Store.new 'votes.yml'
  @votes = @store.transaction { @store['votes'] }
  erb :results
end

We are using YAML here to easily manage our voting data.

YAML stands for YAML Ain't Markup Language. It is a data serialization language that matches user’s expectations about data. It designed to be human friendly and works perfectly with other programming languages. It is highly useful in manage data.

App preview

The web app now will functionally look like below:

Voting app final view

There are many areas of improvement here which I leave up to you. This is quite basic and serve as the base for further development.

Storing voting results

Data persistence with YAML Store

Adding YAML Store library

Update cast and result route handlers

App preview

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