link_to 中的参数不正确

Question

我想单击名为 "User" 和 "Admin" 的下拉项，这应该将我帐户 table 中的角色列更新为此值。

      %tr
        %td 
          .dropdown
            %button#dropdownMenuLink.btn.btn-outline.btn-sm.dropdown-toggle{"aria-expanded" => "false", "aria-haspopup" => "true", "data-toggle" => "dropdown", :type => "button"}
              =account.role
            .dropdown-menu{"aria-labelledby" => "dropdownMenuButton"}
              .dropdown-item #{link_to "User", account.update_attribute("role", "user")} 
              .dropdown-item #{link_to "Admin", account.update_attribute("role", "admin")}

我收到这个错误： undefined method `to_model' for true:TrueClass Did you mean? to_yaml

Answer 1

您需要在控制器中更新属性，而不是在视图中。您可以使用 link_to 转到操作并传递其他参数。

%tr
  %td 
    .dropdown
      %button#dropdownMenuLink.btn.btn-outline.btn-sm.dropdown-toggle{"aria-expanded" => "false", "aria-haspopup" => "true", "data-toggle" => "dropdown", :type => "button"}
        =account.role
      .dropdown-menu{"aria-labelledby" => "dropdownMenuButton"}
        .dropdown-item= link_to "User", path_to_your_action(id: account.id, role: :user) 
        .dropdown-item= link_to "Admin", path_to_your_action(id: account.id, role: :admin)

无论如何，您处理更新和重定向的控制器应该如下所示：

accounts_controller.rb

def your_action
  @account = Account.find(params[:id])
  if @account.update(role: params[:role])
    redirect_to # <somewhere>
  end
end

而不是link_to，你最好使用form_for。

.dropdown-item
  = form_for account do |f|
    = f.hidden_field :role, value: :user
    = f.submit 'User'

link_to 中的参数不正确

incorrect params in link_to

ruby

ruby-on-rails

link-to

update-attributes