Ruby on rails Ruby Rails—在现有数据库中添加一个布尔复选框列,以及如何使用它
如何使用默认值false向现有数据库添加布尔真假列?(假设用户协议复选框) 我现有的表格:Ruby on rails Ruby Rails—在现有数据库中添加一个布尔复选框列,以及如何使用它,ruby-on-rails,Ruby On Rails,如何使用默认值false向现有数据库添加布尔真假列?(假设用户协议复选框) 我现有的表格: create_table "users", :force => true do |t| t.string "name" t.string "email" end 那之后我该怎么办?我应该这样做吗 html: 首先,您需要运行迁移以将列user\u agreement添加到您的user模型中: $ rake generate migration AddUserAgreemen
create_table "users", :force => true do |t|
t.string "name"
t.string "email"
end
那之后我该怎么办?我应该这样做吗
html:
首先,您需要运行迁移以将列
user\u agreement
添加到您的user模型中:
$ rake generate migration AddUserAgreementToUsers user_agreement:boolean
打开刚刚生成的迁移文件,并添加默认值false
:
db/migrate/\u将用户协议添加到用户。rb
class AddUserAgreementToPeople < ActiveRecord::Migration
def change
add_column :people, :user_agreement, :boolean, default: false
end
end
<%= form_for @user %>
...
<%= f.check_box :user_agreement %>
...
<% end %>
app/controllers/users\u controller.rb
class AddUserAgreementToPeople < ActiveRecord::Migration
def change
add_column :people, :user_agreement, :boolean, default: false
end
end
<%= form_for @user %>
...
<%= f.check_box :user_agreement %>
...
<% end %>
如果您正在运行Rails 4,则需要将用户协议
添加到您将接受的参数列表中:
private
def user_params
params.require(:user).permit(:name, :email, :user_agreement)
end
最后将用户协议
添加到表单中
app/views/users/_-form.html.erb
class AddUserAgreementToPeople < ActiveRecord::Migration
def change
add_column :people, :user_agreement, :boolean, default: false
end
end
<%= form_for @user %>
...
<%= f.check_box :user_agreement %>
...
<% end %>
...
...
请看这里