Rails 复选框和序列化数据

发布于 2024-11-08 16:29:27 字数 1162 浏览 0 评论 0原文

我试图找出让复选框正确显示其当前状态的最佳方法。这就是我在表单中的

<%= form_for @user, :url => user_notification_preferences_path(@user), :method => :put do |f| %>
  <%= f.fields_for :notification_preferences, @user.notification_preferences do |p| %>

    <%= p.check_box :notify_on_friend_post %>

    <%= p.check_box :notify_on_friend_post %>

    <%= p.check_box :notify_on_friend_request %>

    <%= p.check_box :notify_on_friend_comment %>
  <% end %>
  <%= f.submit %>
<% end %>

notification_preferences 是我的用户模型上的序列化哈希

class User < ActiveRecord::Base
  serialize :notification_preferences, Hash

我的问题是，无论我尝试什么，我都无法让复选框反映哈希值的现有状态。 IE，如果哈希已经包含：notify_on_friend_post => 1，则应选中该值的复选框。

该表单可以很好地发布数据，我也可以更新我的模型。

使用 check_box_tag更新

我可以让它工作

<%= p.hidden_field :notify_on_friend_post, :value => "0" %>
<%= check_box_tag "user[notification_preferences][notify_on_friend_post]", "1", @user.notification_preferences[:notify_on_friend_post] == "1" ? true : false %>

丑陋但工作，仍然希望我错过了一些非常明显的东西

原文

I'm trying to figure out whats the best way to get checkboxes to properly show their current state. This is what I have in my form

<%= form_for @user, :url => user_notification_preferences_path(@user), :method => :put do |f| %>
  <%= f.fields_for :notification_preferences, @user.notification_preferences do |p| %>

    <%= p.check_box :notify_on_friend_post %>

    <%= p.check_box :notify_on_friend_post %>

    <%= p.check_box :notify_on_friend_request %>

    <%= p.check_box :notify_on_friend_comment %>
  <% end %>
  <%= f.submit %>
<% end %>

notification_preferences is a serialized hash on my user model

class User < ActiveRecord::Base
  serialize :notification_preferences, Hash

My issue that is no matter what I try, I can not get the check boxes to reflect the existing state of the hash values. IE, if the hash already contains :notify_on_friend_post => 1, then the check box for that value should be checked.

The form posts the data fine, and I'm able to update my model as well.

Update

using check_box_tag I can get this to work

<%= p.hidden_field :notify_on_friend_post, :value => "0" %>
<%= check_box_tag "user[notification_preferences][notify_on_friend_post]", "1", @user.notification_preferences[:notify_on_friend_post] == "1" ? true : false %>

ugly but working, still hoping I'm missing something very obvious

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寄与心 2024-11-15 16:29:27

我遇到了这个问题并以更简单的方式解决了它。

<%= form_for @user do |f| %>

  <%= f.fields_for :notifications, @user.notifications do |n| %>
    <%= n.check_box :new_task, checked: @user.notifications[:new_task] == "1" %>
  <% end %>

  <%= f.submit %>
<% end %>

通过这种方式，您可以发挥 check_box 的魔力，并且不需要隐藏字段，因为 Rails 将为您提供一个隐藏字段。仍然不确定为什么需要一个“检查”字段，但如果没有它似乎就无法工作。

I ran into this problem and solved it in a simpler way.

<%= form_for @user do |f| %>

  <%= f.fields_for :notifications, @user.notifications do |n| %>
    <%= n.check_box :new_task, checked: @user.notifications[:new_task] == "1" %>
  <% end %>

  <%= f.submit %>
<% end %>

In this way you let the magic of check_box to the work and don't need to have a hidden_field because Rails will provide one for you. Still unsure why you need a "checked" field, but it seemed to not work without one.

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誰認得朕 2024-11-15 16:29:27

尝试这样的事情：

 <%= form_for @user, :url => user_notification_preferences_path(@user), :method => :put do |f| %>

  <%= check_box_tag "user[notification_preferences][]", :notify_on_friend_post, @user.notification_preferences.try(notify_on_friend_post) %>

 <%= f.submit %>
<% end %>

Try something like this:

 <%= form_for @user, :url => user_notification_preferences_path(@user), :method => :put do |f| %>

  <%= check_box_tag "user[notification_preferences][]", :notify_on_friend_post, @user.notification_preferences.try(notify_on_friend_post) %>

 <%= f.submit %>
<% end %>

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