quickbooks integration in rails application (parameter rejected OAuth) - ruby-on-rails

Question

I am creating a rails application to post invoices to quickbooks I am using this gem quickbooks-ruby every time when I try to authenticate with quickbooks It gives this error OAuth::Problem parameter_rejected below is my code.
quickbook.rb (initialiser)
::QB_OAUTH_CONSUMER = OAuth::Consumer.new(OAUTH_CONSUMER_KEY, OAUTH_CONSUMER_SECRET, {
:site => "https://oauth.intuit.com",
:request_token_path => "/oauth/v1/get_request_token",
:authorize_url => "https://appcenter.intuit.com/Connect/Begin",
:access_token_path => "/oauth/v1/get_access_token"
})
Authenticate method in controller
def authenticate_quickbooks
callback = api_webhooks_quickbook_oauth_callback_path
token = QB_OAUTH_CONSUMER.get_request_token(:oauth_callback => callback)
session[:qb_request_token] = token
redirect_to("https://appcenter.intuit.com/Connect/Begin?oauth_token=#{token.token}") and return
end
callback
def quickbooks_oauth_callback
at = session[:qb_request_token].get_access_token(:oauth_verifier => params[:oauth_verifier])
token = at.token
secret = at.secret
realm_id = params['realmId']
end

Answer 1

Problem solved. My quickbooks app was using oAuth2 and the gem has different method of authentication for oAuth1 and oAuth2.
below is the code (for OAuth2):
quickbook.rb (initialiser)
oauth_params = {
:site => "https://appcenter.intuit.com/connect/oauth2",
:authorize_url => "https://appcenter.intuit.com/connect/oauth2",
:token_url => "https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer"
}
::QB_OAUTH2_CONSUMER = OAuth2::Client.new(OAUTH_CONSUMER_KEY, OAUTH_CONSUMER_SECRET, oauth_params)
Quickbooks.sandbox_mode = true
Authenticate method in controller
redirect_uri = "http://localhost:3000#{quickbooks_authenticate_callback_path}"
grant_url = ::QB_OAUTH2_CONSUMER.auth_code.authorize_url(:redirect_uri => redirect_uri, :response_type => "code", :state => SecureRandom.hex(12), :scope => "com.intuit.quickbooks.accounting")
redirect_to grant_url
callback
redirect_uri = oauth_callback_quickbooks_url
if resp = ::QB_OAUTH2_CONSUMER.auth_code.get_token(params[:code], :redirect_uri => redirect_uri)
where oauth_callback_quickbooks_url = application callback which is also defined in quickbooks app
please note that you also have to include oauth2 gem