问题描述
这个问题下面有一个很好的答案，使用 Comment.includes一击抢一个ActiveRecord收集相关的值（：用户）。那么当你有你想抓住一次过多个关联？
The question below had a good answer to grab associated values of an activerecord collection in one hit using Comment.includes(:user). What about when you have multiple associations that you want to grab in one go?
Rails有ActiveRecord的抢在一个所有需要的团体去？
时，只是这些链在一起，就像下面 Customer.includes的最佳方式（：用户）.includes（：销售）.includes（：价格）或有更清洁的方式。
Is the best way to just chain these together like below Customer.includes(:user).includes(:sales).includes(:prices) or is there a cleaner way.
此外，当我在一个索引表中的循环这样做。我可以在 customer.rb 模型添加一个方法，这样我可以叫 @ customers.table_includes 等，并有
Furthermore, when I am doing this on a loop on an index table. Can I add a method on the customer.rb model so that I can call @customers.table_includes etc and have
def table_includes
self.includes(:user).includes(:sales).includes(:prices)
end
有关的记录，我测试了上面，并没有因为它的上一个采集工作的方法（还没有弄清楚如何做到这一点）。
For the record I tested the above and it didn't work because its a method on a collection (yet to figure out how to do this).
推荐答案
在回答这个，我假设用户，销售和价格都是协会的关客户。
In answering this, I'm assuming that user, sales, and prices are all associations off of Customer.
相反链中，你可以做这样的事情：
Instead of chaining, you can do something like this:
Customer.includes(:user, :sales, :prices)
在创造这个抽象的方面，你有几个选项。
In terms of creating an abstraction for this, you do have a couple options.
首先，你可以创建一个范围：
First, you could create a scope:
class Customer < ActiveRecord::Base
scope :table_includes, -> { includes(:user, :sales, :prices) }
end
或者，如果你想为它是一种方法，你应该考虑把它一类级别的方法，而不是实例级别之一：
Or if you want for it to be a method, you should consider making it a class-level method instead of an instance-level one:
def self.table_includes
self.includes(:user, :sales, :prices)
end
我会考虑，虽然创造这种抽象的目的。就像一个非常通用的名称 table_includes 将可能不会很友好长期。
I would consider the purpose of creating this abstraction though. A very generic name like table_includes will likely not be very friendly over the long term.
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