rails開發隨手記-0

helper默認是只在view中可用的，如果在controller中也要使用，要在ApplicationController中 include

如果model中如果有叫做type的列的話，會觸發rails的Single Table Inheritance ，放棄它吧，不好用，還是安心使用外鍵約束吧。給model加上self.inheritance_column = nil disable它

controller中的參數變量會傳到對應的view中比如：

def new@user = User.new
end---------------------------------new.html.erb----------------------
<%= form_for(@user) do |f| %><%=f.label :name %><%=f.text_field :name %><%=f.label :email %><%=f.text_field :email %><%=f.label :type %><%= f.select(:type, options_for_select([['admin', 'admin'], ['teacher', 'teacher'], ['student', 'student']])) %><%=f.label :password %><%=f.password_field :password %><%=f.label :password_confirmation %><%=f.password_field :password_confirmation %><%= f.submit "Create my account"%>
<% end %>

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