Comprehensive list of acceptable values the Rails 3 generator rakes when defining ActiveRecord value types.

rails3_scaffold_generator_acceptable_value_types.txt

#################################
Scaffold generator options:
Format: [name, type]
#################################

# Active Record supports the following types:

:primary_key
:string
:text
:integer
:float
:decimal
:datetime
:timestamp
:time
:date
:binary
:boolean

# Options

[name:string], :null => false

#################################
Migration file options:
Format: [name, type, options]
#################################

:name, :datetime
:name, :string
:name, :decimal, :scale=>2, :default=>0, :precision=>8
[name, type, option 1, option 2, option 3]

#################################
View form options:
Format: [type, name, options]
#################################

file_field :name, :title => "Upload new Image"
text_area :name, :rows => 5, :size => "20x40", :value => "Hi, nice site"
check_box
email_field
fields_for
form_for
hidden_field
label
number_field
password_field
radio_button
range_field
search_field
telephone_field
text_field
url_field

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If I have left anything out, or made errors email me: victor.stan@gmail.com