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Diffstat (limited to 'activerecord/examples/validation.rb')
| -rw-r--r-- | activerecord/examples/validation.rb | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/activerecord/examples/validation.rb b/activerecord/examples/validation.rb new file mode 100644 index 0000000000..334a1685f7 --- /dev/null +++ b/activerecord/examples/validation.rb @@ -0,0 +1,88 @@ +require File.dirname(__FILE__) + '/shared_setup' + +logger = Logger.new(STDOUT) + +# Database setup --------------- + +logger.info "\nCreate tables" + +[ "DROP TABLE people", + "CREATE TABLE people (id int(11) auto_increment, name varchar(100), pass varchar(100), email varchar(100), PRIMARY KEY (id))" +].each { |statement| + begin; ActiveRecord::Base.connection.execute(statement); rescue ActiveRecord::StatementInvalid; end # Tables doesn't necessarily already exist +} + + +# Class setup --------------- + +class Person < ActiveRecord::Base + # Active Record can only guess simple table names like Card/cards, Company/companies + def self.table_name() "people" end + + # Using + def self.authenticate(name, pass) + # find_first "name = '#{name}' AND pass = '#{pass}'" would be open to sql-injection (in a web-app scenario) + find_first [ "name = '%s' AND pass = '%s'", name, pass ] + end + + def self.name_exists?(name, id = nil) + if id.nil? + condition = [ "name = '%s'", name ] + else + # Check if anyone else than the person identified by person_id has that user_name + condition = [ "name = '%s' AND id <> %d", name, id ] + end + + !find_first(condition).nil? + end + + def email_address_with_name + "\"#{name}\" <#{email}>" + end + + protected + def validate + errors.add_on_empty(%w(name pass email)) + errors.add("email", "must be valid") unless email_address_valid? + end + + def validate_on_create + if attribute_present?("name") && Person.name_exists?(name) + errors.add("name", "is already taken by another person") + end + end + + def validate_on_update + if attribute_present?("name") && Person.name_exists?(name, id) + errors.add("name", "is already taken by another person") + end + end + + private + def email_address_valid?() email =~ /\w[-.\w]*\@[-\w]+[-.\w]*\.\w+/ end +end + +# Usage --------------- + +logger.info "\nCreate fixtures" +david = Person.new("name" => "David Heinemeier Hansson", "pass" => "", "email" => "") +unless david.save + puts "There was #{david.errors.count} error(s)" + david.errors.each_full { |error| puts error } +end + +david.pass = "something" +david.email = "invalid_address" +unless david.save + puts "There was #{david.errors.count} error(s)" + puts "It was email with: " + david.errors.on("email") +end + +david.email = "david@loudthinking.com" +if david.save then puts "David finally made it!" end + + +another_david = Person.new("name" => "David Heinemeier Hansson", "pass" => "xc", "email" => "david@loudthinking") +unless another_david.save + puts "Error on name: " + another_david.errors.on("name") +end
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