Having just touched Rails, following the tutorial on headfirst, I added a new field phone to an already created database, but it did not seem to be added. The code is as follows:
rails generate migration AddPhoneToTickets phone:string
And use migration:
The files under migrate under db under the project have also changed:
class AddPhoneToTickets < ActiveRecord::Migration[5.1] def change add_column :tickets, :phone, :string end end
However, it was not added when submitted on the webpage, as shown in the figure:
Ask big brother to answer! ! Thank you very much
It should be that the newly added attribute is not whitelisted.
Rails has a feature called robust parameters (http://guides.rubyonrails.org …), Active Model cannot directly use params for batch assignment, and only whitelisted parameters will be read by Active Model.
You can check that there should be a method called user_params in UsersController. This method is to whitelist the parameters in params. You can try adding: phone.