Well you don't exactly have to do it by *hand*. It's pretty easy to write a 
script to generate the command for you. Just change table_name to whatever 
your model is...

table_name = "Post"
output = [ "rails g scaffold #{table_name} --skip-migration" ]
ignore_columns = [ 'id', 'created_at', 'updated_at' ]
table_name.constantize.columns.each do |c|
  output << "#{c.name}:#{c.type}" unless ignore_columns.include?(c.name)
end
puts output.join(" ")

returns: rails g scaffold Post --skip-migration title:string body:text 
published_at:datetime

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