具有嵌套属性的 Rails 表单保存两次

Question

将rails表单与嵌套表单集成，一切正常，但问题是记录保存多次。

app/models/user.rb

has_many :badges, :dependent => :destroy
accepts_nested_attributes_for :badges, :allow_destroy => true, reject_if:  proc { |attributes| attributes['badge_type'] == "0" }

app/models/badge.rb

belongs_to :user_id

app/controllers/user_controller.rb

def new
    @user = User.new
    @user.badges.build
end

def create
   @user = User.new(user_params)
   @user.save!
end

private
def user_params
    params.require(:user).permit(:name,:email,badges_attributes: [:id, :badge_type,:_destroy])
end   

app/views/users/_form.html.erb

<%= f.fields_for :badges do |ff| %>
    <%= ff.check_box :badge_type %>
    <label>Admin</label>
<% end %>

但它是保存记录两次。如何解决？

Answer 1

创建新的User 时，您只需将:badges 属性作为user_params 的一部分传递

user_controller.rb

def create
  @user = User.new(user_params)
  @user.save
end

def user_params
  params.require(:user).permit(:name, :phone, :email, attributes_for_badges: %i[id badge_type _destroy])
end