3 questions

rubyonrails-talk
1

1) validates_format_of :name, :with => /\A(\w(?:[\/' \-\.])?)*\Z/i

What does the 'i' do at the end of the regular expression?

2) Should I do validation for attributes that are not from a form?

3)   def self.up     create_table :customers do |t|       t.column :number, :integer, :limit => 4     end   end

As far as I know, Mysql 5.0.27 uses Int for number here. Will also a small number need 4 bytes in the database?

2

validates_format_of :name, :with => /\A(\w(?:[\/' \-\.])?)*\Z/i

What does the 'i' do at the end of the regular expression?

/i makes a regex case-insensitive. See http://www.ruby-doc.org/core/classes/Regexp.html#M001219 for other Regexp options