Rails

https://guides.rubyonrails.org/getting_started.html

https://guides.rubyonrails.org/active_record_basics.html

笔记

bin/rails console

Project.all
Project.create(name: "Hello")
p = Project.new(name: "Hello")
p.save

p.valid?
p.errors
p.errors.full_messages

flash message

partial 模板代码复用