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- ## Problem: when i edit a user and either give or take a way administrator status (boolean in table) and click save, it says that it is successfully saved, but in reality fails to update the row in the table.
- Console gives the following warning:
- WARNING: Can't mass-assign these protected attributes: administrator
- ## edit.html.erb
- <% if logged_in? && current_user.administrator? %>
- <p><label for="user_administrator">Administrator</label><br />
- <%= f.check_box :administrator %></p>
- ## user_controller.rb
- def update
- @user = User.find(params[:id])
- respond_to do |format|
- if @user.update_attributes(params[:user])
- flash[:notice] = 'User was successfully updated.'
- format.html { redirect_to(@user) }
- format.xml { head :ok }
- else
- format.html { render :action => "edit" }
- format.xml { render :xml => @user.errors, :status => :unprocessable_entity }
- end
- end
- end
- ## Migration to add the administrator column
- class AddAdministratorColumnToUser < ActiveRecord::Migration
- def self.up
- add_column :users, :administrator, :boolean, :default => false
- end
- def self.down
- remove_column :users, :administrator
- end
- end
- ## user.rb
- require 'digest/sha1'
- class User < ActiveRecord::Base
- # Virtual attribute for the unencrypted password
- attr_accessor :password
- validates_presence_of :login, :email
- validates_presence_of :password, :if => :password_required?
- validates_presence_of :password_confirmation, :if => :password_required?
- validates_length_of :password, :within => 4..40, :if => :password_required?
- validates_confirmation_of :password, :if => :password_required?
- validates_length_of :login, :within => 3..40
- validates_length_of :email, :within => 3..100
- validates_uniqueness_of :login, :email, :case_sensitive => false
- before_save :encrypt_password
- # prevents a user from submitting a crafted form that bypasses activation
- # anything else you want your user to change should be added here.
- attr_accessible :login, :email, :password, :password_confirmation
- # Authenticates a user by their login name and unencrypted password. Returns the user or nil.
- def self.authenticate(login, password)
- u = find_by_login(login) # need to get the salt
- u && u.authenticated?(password) ? u : nil
- end
- # Encrypts some data with the salt.
- def self.encrypt(password, salt)
- Digest::SHA1.hexdigest("--#{salt}--#{password}--")
- end
- # Encrypts the password with the user salt
- def encrypt(password)
- self.class.encrypt(password, salt)
- end
- def authenticated?(password)
- crypted_password == encrypt(password)
- end
- def remember_token?
- remember_token_expires_at && Time.now.utc < remember_token_expires_at
- end
- # These create and unset the fields required for remembering users between browser closes
- def remember_me
- remember_me_for 2.weeks
- end
- def remember_me_for(time)
- remember_me_until time.from_now.utc
- end
- def remember_me_until(time)
- self.remember_token_expires_at = time
- self.remember_token = encrypt("#{email}--#{remember_token_expires_at}")
- save(false)
- end
- def forget_me
- self.remember_token_expires_at = nil
- self.remember_token = nil
- save(false)
- end
- # Returns true if the user has just been activated.
- def recently_activated?
- @activated
- end
- protected
- # before filter
- def encrypt_password
- return if password.blank?
- self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--") if new_record?
- self.crypted_password = encrypt(password)
- end
- def password_required?
- crypted_password.blank? || !password.blank?
- end
- end
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