find_by_sql等价于蒙古包吗? [英] find_by_sql equivalent for mongoid?

问题描述

是否存在与mongoid等效的find_by_sql，您在其中传递了mongo查询，并从结果中实现了Mongoid :: Document?

Is there some sort of find_by_sql equivalent for mongoid, where you pass a mongo query and it materializes Mongoid::Document s from the results?

推荐答案

Mongoid包装Collection对象以返回适当类的对象.

Mongoid wraps the Collection object to return objects of the proper class.

因此，如果用户是Mongoid模型:

So, if User is a Mongoid model:

cursor = User.collection.find({}, {}) # Just like the Ruby driver...
records = cursor.to_a # An array of User objects

编辑添加:它实际上也包装了Mongo的Cursor类. 请参见此处:

Edit to add: It actually wraps Mongo's Cursor class too. See here:

def each
  @cursor.each do |document|
    yield Mongoid::Factory.build(@klass, document)
  end
end

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