为了处理通过关系的has_many [英] handling order with has_many through relationship

问题描述

我有两个型号：项目和任务（例如）与加盟模式：project_task使通过关系的has_many这样的任务可以跨项目共享

I have two models: project and task (for example) with a join model: project_task enabling a has_many through relationship so that tasks may be shared across projects.

我已指定的位置作为project_task模型的一个属性。现在，我希望能够通过一个给定的项目，以访问任务由他们在project_tasks表中的位置。

I have specified position as an attribute of the project_task model. Now I want to be able to access tasks by their position in the project_tasks table via a given project.

即。 project.tasks（上市在project_tasks表中的每个任务的位置排序）。

i.e. project.tasks (ordered by the position listed for each task in the project_tasks table).

这可能吗？

推荐答案

我想类似的东西，可以帮助你：

I think something like that can help you:

has_many :project_tasks
has_many :tasks, :through => :project_tasks, :order => 'project_tasks.position'

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