[英]ActiveModel serializer inheritance
say I have this serializer 说我有这个序列化器
class FooSerializer < ActiveModel::Serializer
attributes :this, :that, :the_other
def this
SomeThing.expensive(this)
end
def that
SomeThing.expensive(that)
end
def the_other
SomeThing.expensive(the_other)
end
end
Where the operations for the individual serialized values is somewhat expensive... 单个序列化值的操作有些昂贵...
And then I have another serializer that whats to make use of that, but not return all of the members: 然后我有另一个序列化器,它可以使用它,但不会返回所有成员:
class BarSerializer < FooSerializr
attributes :the_other
end
This does not work... BarSerializer will still have this, that, and the_other... 这不起作用...... BarSerializer仍然会有这个,那个和另外的......
How can I make use of inheritance but not automatically get the same attributes? 如何使用继承但不能自动获取相同的属性? I am looking for a solution other than module mixins. 我正在寻找除模块mixins之外的解决方案。
Turns out the answer to this is to make use of the magic include_xxx? 原来这个答案就是利用魔法include_xxx? methods... 方法...
class BarSerializer < FooSerializr
def include_this?; false; end
def include_that?; false; end
end
This will make it only serialize "the_other" 这将使它只序列化“the_other”
Make the BarSerializer
the parents class and put the method the_other
in it. 将BarSerializer
设为父类,并将方法the_other
放入其中。 FooSerializer
will inherits only the method and the attribute defined in BarSerializer
. FooSerializer
将仅继承BarSerializer
定义的方法和属性。
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