How to tell Ruby not to serialize an attribute or how to overload marshal_dump properly?
I have an 开发者_JAVA百科attribute in my AR:B that is not serializeable.
o = Discussion.find(6)
Marshal.dump(o)
TypeError: no marshal_dump is defined for class Proc
from (irb):10:in `dump'
I know the culprit and what I want is to set this variable to nil before any serialization takes place.
I can do this but I'm stuck with the proper way to override marshal_dump
def marshal_dump
@problem = nil
# what is the right return here?
end
Or is there is way to tell Ruby or AR not to serialize an object?
Your specialized marshal_dump
should return an object containing the data you want to serialize. That object will be passed back to marshal_load
at load time.
In this case, I'm assuming the data you want to dump corresponds to all AR attributes (and only those), so I'd try:
def marshal_dump
attributes
end
def marshal_load(data)
send :attributes=, data, false # false to override even protected attributes
end
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