我有一对一的关系,有一条<条码>,<>条码>>><代码>:has_many<条码>。
I m 寻求一种办法,在不进行N+1查询的情况下,建立一个Thing及其所有N元素。 我尝试:
[loop in Thing model]
self.elements.build({...})
...
self.save
但是,它为每个组成部分单独插入一个字。
我有一对一的关系,有一条<条码>,<>条码>>><代码>:has_many<条码>。
I m 寻求一种办法,在不进行N+1查询的情况下,建立一个Thing及其所有N元素。 我尝试:
[loop in Thing model]
self.elements.build({...})
...
self.save
但是,它为每个组成部分单独插入一个字。
This capability is not built in.
One option is to use a transaction, which will not eliminate the multiple INSERT
s but will send all of them in one request, which will help with performance some. For example:
ActiveRecord::Base.transaction do
1000.times { MyModel.create(options) }
end
但是,如果是真的批量
books = []
10.times do |i|
books << Book.new(:name => "book #{i}")
end
Book.import books
我认为,这可能是你的最佳选择。
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