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Note that we ve added the argument :default => false to add_column in Listing 1035, which means that users will not be administrators by default (Without the :default => false argument, admin will be nil by default, which is still false, so this step is not strictly necessary It is more explicit, though, and communicates our intentions more clearly both to Rails and to readers of our code) Finally, we migrate the development database and prepare the test database:

causes slush to run MyApptini from the bin directory and redirect all output from javalangSystemout and javalangSystemerr to a log le named

As expected, Rails figures out the boolean nature of the admin attribute and automatically adds the question-mark method admin :11

$ rails console >> user = Userfirst >> useradmin => false >> userpassword = "foobar" >> usertoggle!(:admin) => true >> useradmin => true

<!ELEMENT review ANY> <!ATTLIST review xlink:type (simple|extended|locator|arc) #FIXED "locator" <!-- This is a locator link because it points to an external resource --> xlink:href xlink:type xlink:show the linked-to data come up in a new window, be embedded in the current window or replace the current content --> xlink:actuate request (for example, the user clicks on the link text) --> >

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All applications launched from the startup le are forced to run in the background This concludes our mini-tour of our new le system Type cd / at the command prompt to return to the root directory

As a final step, let s update our sample data populator to make the first user an admin (Listing 1036)

The help command provides a hands-on approach to exploring slush as well as some insight into the capabilities of TINI s runtime environment Type help at the prompt at any time to obtain a complete list of all commands supported by slush

require 'faker' namespace :db do desc "Fill database with sample data" task :populate => :environment do Rake::Task['db:reset']invoke admin = Usercreate!(:name => "Example User",

11 The toggle! method invokes the Active Record callbacks but not the validations, so we have to set the password attribute (but not the confirmation) in order to have a non-blank password in the encrypt_password callback

TINI /> help Available Commands: append chmod cp dir gc hostname ls mv ping reboot setenv stopserver userdel whoami arp chown date downserver genlog ipconfig md netstat ps rm source su wall cat clear del echo help java mkdir nslookup pwd rmdir startserver touch wd cd copy df ftp history kill move passwd rd sendmail stats useradd who

Now let's imagine the following partial decomposition table in which to store this link data:

:email => "example@railstutorialorg", :password => "foobar", :password_confirmation => "foobar") admintoggle!(:admin) end end

A command s description and usage is obtained by typing help followed by the name of the command at the prompt Typing help java at the prompt displays the usage message for the java command

Finally, re-run the populator to reset the database and then rebuild it from scratch:

Revisiting attr_accessible You might have noticed that Listing 1036 makes the user an admin with toggle!(:admin), but why not just add :admin => true to the initialization hash The answer is, it won t work, and this is by design: only attr_accessible attributes can be assigned through mass assignment, and the admin attribute isn t accessible Listing 1037 reproduces the most recent list of attr_accessible attributes note that :admin is not on the list

TINI /> help java java FILE [&] Executes the given Java application & indicates a background process

CDATA (topic | genre | other) (new | embed | replace)

class User < ActiveRecord::Base attr_accessor :password attr_accessible :name, :email, :password, :password_confirmation end

The java command is used to launch new Java processes The usage message speci es the required and optional parameters In this case, the java command requires the name of the application binary le to be executed and optionally allows the user to launch the application as a background process using the & parameter We ll use the java command in Section 26 to run the example programs

Explicitly defining accessible attributes is crucial for good site security If we omitted the attr_accessible list in the User model (or foolishly added :admin to the list), a malicious user could send a PUT request as follows:12

This request would make user 17 an admin, which could be a potentially serious security breach, to say the least Because of this danger, it is a good practice to define attr_accessible for every model

2

The signin form (/sessions/new)

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