Ruby-on-rails LoadError 无法自动加载常量消息
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LoadError Unable to autoload constant Message
提问by pwz2000
In my app; when I submit form, I get this error:
在我的应用程序中；当我提交表单时，出现此错误：
LoadError at /questions
Unable to autoload constant Message, expected /app/models/message.rb to define it
It points to the createaction in the Questionscontroller:
它指向控制器中的create动作Questions：
@message = current_user.messages.new(:subject => "You have a question from #{@question.sender_id}"`
Message model:
消息模型：
class Mailboxer::Message < ActiveRecord::Base
attr_accessible :notification_id, :receiver_id, :conversation_id
end
回答by kik
By convention in rails (and this is enforced by autoloader), file paths should match namespaces.
按照 Rails 的约定（这是由自动加载器强制执行的），文件路径应该匹配命名空间。
So, if you have a Mailboxer::Messagemodel, it should be in app/models/mailboxer/message.rb.
所以，如果你有一个Mailboxer::Message模型，它应该在app/models/mailboxer/message.rb.
Additionally, you probably have autoloader kicking in when trying to load a Messageclass (my guess is that it happens from within ActAsMessageable). It looks for a message.rbfile in load path, find it in app/model/and thus load that file so it can find the Messageclass.
此外，您可能在尝试加载Message类时启动了自动加载器（我的猜测是它发生在 ActAsMessageable 中）。它message.rb在加载路径中查找文件，在其中找到app/model/并加载该文件，以便它可以找到Message类。
Problem is, it doesn't find a Messageclass in that file, only a Mailboxer::Messageclass (which is radically different). This is why it throws "Unable to autoload constant Message, expected /app/models/message.rb to define it".
问题是，它没有Message在该文件中找到一个类，只有一个Mailboxer::Message类（这是完全不同的）。这就是为什么它会抛出“无法自动加载常量消息，需要 /app/models/message.rb 来定义它”。
To fix that, create directory app/models/mailboxer/and put Mailboxer::Messagein it.
要解决该问题，请创建目录app/models/mailboxer/并将其放入Mailboxer::Message。
回答by Jay
I got this during integration testing. Turns out, it was fixtures related. Had to delete the my unused file in /test/fixtures/wrong_name.yml
我在集成测试期间得到了这个。原来，这与固定装置有关。不得不删除 /test/fixtures/wrong_name.yml 中我未使用的文件
回答by tebayoso
As stated in the documentation, to send a message from Amodel to Bmodel you have to add:
如文档中所述，要在A模型之间发送消息，B您必须添加：
acts_as_messageable
in both models.
在这两种模型中。
And then do:
然后做：
a.send_message(b, "Body", "subject")
So in your models:
所以在你的模型中：
class User < ...
act_as_messageable
end
@question_sendermust be a Userinstance.
@question_sender必须是一个User实例。
@question_sender.send_message({attr_accessor_hash}, recipient_user, @question.body, "You have a question from #{@question_sender.id}")
As long as the attr_accessoris not related to the gem, and the method send_message is not aware of this attributes you will have to redefine it:
只要attr_accessor与 gem 无关，并且方法 send_message 不知道此属性，您将不得不重新定义它：
https://github.com/mailboxer/mailboxer/blob/master/lib/mailboxer/models/messageable.rb#L60
https://github.com/mailboxer/mailboxer/blob/master/lib/mailboxer/models/messageable.rb#L60
add the attr_accessor_hash to method
将 attr_accessor_hash 添加到方法中
def send_message({attr_accesor_hash}, recipients, msg_body, subject, sanitize_text=true, attachment=nil, message_timestamp = Time.now)
And look at the code add the fields where you need as: attr_accessor["param"]
并查看代码在您需要的位置添加字段： attr_accessor["param"]
回答by Acacia
Notice these lines;
注意这些行；
@question = Question.new(params[:question])
@question.message = @message
and ;
和 ;
attr_accessible :answer, :question, :sender_id, :recipient_id, :conversation_id
The @question.messageline is calling an attribute that is not accessible in the Question Modelso do this;
该@question.message行正在调用一个无法访问的属性，Question Model所以这样做；
attr_accessible :answer, :question, :sender_id, :recipient_id, :conversation_id, message
