小時後和研究時間,有人可以幫我這個問題: 當我把命令的Heroku運行耙分貝:遷移,我有這個問題: $ heroku run rake db:migrate
Your version of git is 1.9.4.. Which has serious security vulnerabilities.
More information here: https://blog.heroku.c
我在教程中遇到了以下代碼。 的目標是從表books class RemoveGenreFromBooks < ActiveRecord::Migration
def up
remove_index :books, column: [:genre_id]
remove_column :books, :genre_id
end
def down