Skip to main content

Implementing Roo gem in Rails 3

Roo gem allows us to access the contents of
Open-office spreadsheets (.ods)
  • Excel spreadsheets (.xls)
  • Google (online) spreadsheets
  • Excel’s new file format .xlsx
Following is a basic example to demonstrate how to read the datas from an excel sheet and save to your database.Suppose you have an excel sheet named student_details.xls which contain the student details such as “Name”,”Phone”,”Address”.We have to save them in our database but it will take a huge time if we insert them manually.Here we can user “roo” gem to fetch the datas from excel sheet and save to database in a fly.
Step – 1
Add the gem in your gem file
gem ‘roo’
Then run the ‘bundle install
Step – 2
Place your excel sheet in the rails application such as in public folder.
Step – 3
Now its time to change your controller like below.
  • Add the following line in your controller
require ‘roo’
  • Create a new method where you will fetch the data from excel sheet and save it in your database.
def fetch_excel_data
ex = Excel.new(“#{Rails.root}/public/student_details.xls”)
ex.default_sheet = ex.sheets[1] #Mention the sheet number
3.upto(1000) do |line| #start and end of row
name = ex.cell(line,’A’)
phone = ex.cell(line,’B’)

adr = ex.cell(line,’C’)
@student = Student.create(:name => name,:phone => phone,:address => adr)
end
end

usefullink :https://github.com/zenkay/simple-spreadsheet 
http://railscasts.com/episodes/396-importing-csv-and-excel?view=asciicast

Comments

Popular posts from this blog

Gem::LoadError (Specified 'mysql2' for database adapter, but the gem is not loaded. Add `gem 'mysql2'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).?

Gem::LoadError (Specified 'mysql2' for database adapter, but the gem is not loaded. Add `gem 'mysql2'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).) In rails?


1)change the gemfile in mysql version
 gem 'mysql2'

2)Change to mysql2 version
 gem 'mysql2','0.3.20'

Get user accessing ip address in rails?

Get user accessing ip address rails?

request.ip ->returns the ip, whether is is a local proxy ip (localhost address) or not.
*request.remote_ip -> is smarter and gets the ip address of the client outside of local proxies.
3)If you are using apache in front of a mongrel, then remote_ip will return the source address of the request, which in this case will be local host because the Apache web server is making the request, so instead put this in your controller:

@remote_ip = request.env["HTTP_X_FORWARDED_FOR"]

PayUMoney Integration in Ruby on Rails

PayUMoney Integration in Ruby on Rails


Generating Cheksum in Payu
   Hash or Checksum
= sha512(key|txnid|amount|productinfo|firstname|email|u
df1|udf2|udf3|udf4|udf5||||||salt)



Controller Code Will be
def payumoney
  @key = "gtKFFx"
  @salt =  "eCwWELxi"
  val = "#{key|txnid|amount|productinfo|firstname|email|u
df1|udf2|udf3|udf4|udf5||||||#{@salt}"
 @checksum = Digest::SHA512.hexdigest("#{val}")
end

<form action="https://test.payu.in/_payment" method='post' id='sub'  >
    <input type="hidden" name="key" value="<%=@key%>">
    <input type="hidden" name="hash" value="<%=@checksum%>">
    <input type="hidden" name="txnid" value="TXN1234">
    <input type="hidden" name="amount" value="200">
    <input type="hidden" name="firstname" value=&quo…