Model based on an active record from an existing table operation

The guide is directly generated by mode, then db migrate to generate the database, in real-world scenarios, which is likely to be reversed

For example

Test Table App_versions

Inside rails, create model

class AppVersion < activerecord::base  #  This is manually added  'app_versions ' End

Just fine.

Test controller, the specific active record query can be more than Google check

class Mytestcontroller < Applicationcontroller  def  index    = Appversion.select ("platform")  endend

Test View

<% @versions. Each do |version|%><%= version.platform%></br><%end%>

Model based on an active record from an existing table operation