i got it
work place .text in a insert line

code:

require 'sqlite3'
Shoes.app do
  @name = edit_line
     button "save" do
  db = SQLite3::Database.new "test.db"
  db.execute "create table test (test VARCHAR(25))"
  db.execute "insert into test (test) values ('#{@name.text}')"
  rows = db.execute "select * from test"
  rows.each{|name| para "#{name}"}
    end
  end

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