2018-01-19 rails101

app/helpers/flashes_helper.rb
错：FLASS_CLASSES.fetch key.to_sym, key
对：FLASH_CLASSES.fetch key.to_sym, key

app/controllers/welcome_controller.rb
错：flash[:nitice] = "早安!你好！"
对：flash[:notice] = "早安!你好！"

app/views/groups/index.html.erb
错：<%= link_to("New group", new_group_path, class="btn btn-primary pull-right") %>
对：<%= link_to("New group", new_group_path, class:"btn btn-primary pull-right") %>

错：<% link_to("Edit", edit_group_path(group), class: "btn btn-sm btn-default")%>
对：<%= link_to("Edit", edit_group_path(group), class: "btn btn-sm btn-default")%>

错：<%= link_to("Delete", group_path(group), class: "btn btn-sm btn-default",mothod: :delete, data: { confirm: "Are you sure?" }) %>
对：<%= link_to("Delete", group_path(group), class: "btn btn-sm btn-default",method: :delete, data: { confirm: "Are you sure?" }) %>
这个一直做到下面的delete，不对，才回来找。幸好找到了。
庆幸。