将参数传递给rails 3中的before_create回调

发布于 2024-12-04 16:49:54 字数 1289 浏览 7 评论 0原文

因此，受本教程的启发，我正在为 Facebook 的社交网络平台实现一个消息系统 http:// www.novawave.net/public/rails_messaging_tutorial.html

我已经具备发送消息的基本功能，现在我希望用户能够保存草稿以便稍后发送。

创建消息时，它会在消息模型的 before_create 方法中为每个收件人创建该消息的副本。

to.each do |recipient|
    recipient = User.find(recipient)
    message_copies.build(:folder_id => recipient.inbox.id, :recipient_id => recipient.id, :read => false)
  end

我想将参数传递给 before_create 回调，以便它知道是否应该为收件人构建消息副本，或者只是将其保存为草稿，这样我就可以使用相同的方法而无需更改模型。

我想过跳过这种特殊情况的回调，但不明白如何做到这一点。

这是创建新消息的视图

<% form_for @message, :url => {：控制器=> “已发送”，：动作=> “创建”}做|f| %>

<select name="message[to][]" multiple="multiple">
    <%= options_from_collection_for_select(User.find(:all), :id, :login, @message.to) %>
</select>

<p>
    Subject: <%= f.text_field :subject %>
</p>

<p>
    Body:
    <br />
    <%= f.text_area :body %>
</p>

<p>
    <%= submit_tag "Send", :name => 'do_send' %>
    <%= submit_tag "Save", :name => 'save_draft' %>
</p>

<%结束%>

有什么建议吗？

谢谢

编辑：更多代码！

原文

So i am implementing a messaging system à la Facebook for a social network platform inspired by this tutorial http://www.novawave.net/public/rails_messaging_tutorial.html

I have the basic funcionality of sending messages working and now I want the user to be able to save a draft for sending it later.

when creating a message it creates copies of this message for each recipient in the before_create method of my message model.

to.each do |recipient|
    recipient = User.find(recipient)
    message_copies.build(:folder_id => recipient.inbox.id, :recipient_id => recipient.id, :read => false)
  end

I would like to pass parameters to the before_create callback so that it knows if it should build message copies to the recipients or simply save it as a draft, so I can use the same method without altering the model.

I thought of skipping callbacks for this particular case but couldn't understand how to do it.

Here is the view for creating a new message

<% form_for @message, :url => {:controller => "sent", :action => "create"} do |f| %>

<select name="message[to][]" multiple="multiple">
    <%= options_from_collection_for_select(User.find(:all), :id, :login, @message.to) %>
</select>

<p>
    Subject: <%= f.text_field :subject %>
</p>

<p>
    Body:
    <br />
    <%= f.text_area :body %>
</p>

<p>
    <%= submit_tag "Send", :name => 'do_send' %>
    <%= submit_tag "Save", :name => 'save_draft' %>
</p>

<% end %>

Any suggestions?

thanks

edit : more code!

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岁吢 2024-12-11 16:49:54

我认为您可以借助 Ajax 将消息和消息的接收者存储在数据库中。这样您就可以像 gmail 一样继续发送消息。

另一种选择是在表单上对“发送”和“另存为草稿”进行 2 个不同的提交，并根据提交参数，您可以处理消息。

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我的奇迹 2024-12-11 16:49:54

您可能有条件回调

class Comment < ActiveRecord::Base
  before_create :send_email_to_author, :if => :author_wants_emails?,
    :unless => Proc.new { |comment| comment.post.ignore_comments? }
end

和虚拟属性之类的东西来决定是构建发送给收件人的消息副本还是简单地将其保存为草稿。

You might have something like conditional callbacks

class Comment < ActiveRecord::Base
  before_create :send_email_to_author, :if => :author_wants_emails?,
    :unless => Proc.new { |comment| comment.post.ignore_comments? }
end

and a virtual attribute to decide either build message copies to the recipients or simply save it as a draft.

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