Ruby on Rails，habtm收集方法不收集？

发布于 2024-10-20 10:20:52 字数 510 浏览 1 评论 0原文

我正在尝试在删除时将数据备份到 yaml 存储，如下所示：

DeleteProject.create!(:data => {
  :project => project.attributes, 
  :domains => project.domains.collect(&:attributes), 
  :databases => project.databases.collect(&:attributes)
}.to_yaml)

但是，尽管项目和域数据存储良好，但数据库始终返回空白。该关系是通过

has_and_belongs_to_many :databases
has_and_belongs_to_many :projects

完成的我对此陷入了死胡同，因为我不知道为什么它根本不会传递当前数据来自项目.数据库。任何见解都会很棒，谢谢！

原文

I am trying to backup data to a yaml store on deletion like so:

DeleteProject.create!(:data => {
  :project => project.attributes, 
  :domains => project.domains.collect(&:attributes), 
  :databases => project.databases.collect(&:attributes)
}.to_yaml)

However although the project and domain data is stored fine, databases is always coming back blank. The relationship is done via

has_and_belongs_to_many :databases
has_and_belongs_to_many :projects

I am at a dead end with this one as I do not know why it simply would not be passing in the current data from project.databases. Any insight would be great, thanks!

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你的背包 2024-10-27 10:20:52

好的，我通过执行以下操作解决了这个问题：

has_many :database_connections
has_many :databases, :through =>
:database_connections

更新模型以使用 has_many，然后更新连接表，不再是database_projects，而是database_connections。

class DatabaseConnection < ActiveRecord::Base
  belongs_to :projects, :class_name => "Project",
                        :foreign_key => "project_id"
  belongs_to :databases, :class_name => "Database",
                         :foreign_key => "database_id"
end

Okay so I fixed this by doing the following:

has_many :database_connections
has_many :databases, :through =>
:database_connections

Updated models to use has_many and then updated the connecting table no longer database_projects but database_connections.

class DatabaseConnection < ActiveRecord::Base
  belongs_to :projects, :class_name => "Project",
                        :foreign_key => "project_id"
  belongs_to :databases, :class_name => "Database",
                         :foreign_key => "database_id"
end

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