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POI need simple but complete instructions for implementing a Devise authentication strategy
 

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  1. POI need simple but complete instructions for implementing a Devise authentication strategy
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    <p>I am trying to write a devise authentication strategy to authenticate against an existing legacy API. I have no database, so I cannot migrate Users from some existing source. I want to do something like:</p> <p><a href="http://4trabes.com/2012/10/31/remote-authentication-with-devise/" rel="nofollow">http://4trabes.com/2012/10/31/remote-authentication-with-devise/</a></p> <p>However, after following those instructions, Devise refuses to call my authentication strategy. I've tested this by attempting to insert puts calls into my RemoteAuthenticatable modules...</p> <p>Peter.</p> <p>EDIT adding code as requested.</p> <p>app/models/User.rb:</p> <pre><code>class User attr_accessor :id include ActiveModel::Validations #required because some before_validations are defined in devise extend ActiveModel::Callbacks #required to define callbacks extend Devise::Models define_model_callbacks :validation #required by Devise devise :remote_authenticatable end </code></pre> <p>lib/remote_authenticatable.rb (Note the puts I've inserted to get some poor-man's tracing).</p> <pre><code>module Devise module Models module RemoteAuthenticatable extend ActiveSupport::Concern # # Here you do the request to the external webservice # # If the authentication is successful you should return # a resource instance # # If the authentication fails you should return false # def remote_authentication(authentication_hash) puts "In Devise::Models::RemoteAuthenticatable.remote_authentication()" # Your logic to authenticate with the external webservice end module ClassMethods #################################### # Overriden methods from Devise::Models::Authenticatable #################################### # # This method is called from: # Warden::SessionSerializer in devise # # It takes as many params as elements had the array # returned in serialize_into_session # # Recreates a resource from session data # def serialize_from_session(id) resource = self.new resource.id = id resource end # # Here you have to return and array with the data of your resource # that you want to serialize into the session # # You might want to include some authentication data # def serialize_into_session(record) [record.id] end end end end module Strategies class RemoteAuthenticatable &lt; Authenticatable def valid? puts "In Devise::Strategies::RemoteAuthenticatable.valid?()" true end # # For an example check : https://github.com/plataformatec/devise/blob/master/lib/devise/strategies/database_authenticatable.rb # # Method called by warden to authenticate a resource. # def authenticate! puts "In Devise::Strategies::RemoteAuthenticatable.authenticate!()" # # authentication_hash doesn't include the password # auth_params = authentication_hash auth_params[:password] = password # # mapping.to is a wrapper over the resource model # resource = mapping.to.new return fail! unless resource # remote_authentication method is defined in Devise::Models::RemoteAuthenticatable # # validate is a method defined in Devise::Strategies::Authenticatable. It takes #a block which must return a boolean value. # # If the block returns true the resource will be loged in # If the block returns false the authentication will fail! # if validate(resource){ resource.remote_authentication(auth_params) } success!(resource) end end end end end </code></pre> <p>and the code I added to config/initializers/devise.rb</p> <pre><code> require 'remote_authenticatable' config.warden do |manager| manager.strategies.add(:remote, Devise::Strategies::RemoteAuthenticatable) manager.default_strategies(:scope =&gt; :user).unshift :remote end Devise.add_module :remote_authenticatable, :controller =&gt; :sessions, :route =&gt; { :session =&gt; :routes } </code></pre>
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    1. COShow some of your code?
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    2. COwere you able to fix this ? I'm getting the same issue
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    3. COI broke down and rolled my own. Sorry Sandeep.
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