Rails - Aug 2012 - ActiveRecord storing arrays and hashes

Hi,

When trying to store a Array or Hash to a string field, ActiveRecord
automatically
serializes them to yaml. If that''s so why is there a special option
called serialize?

-- 
Azhagu Selvan

http://tamizhgeek.in

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On Friday, August 24, 2012 11:46:35 AM UTC+1, Azhaguselvan SP
wrote:
>
> Hi, 
>
> When trying to store a Array or Hash to a string field, ActiveRecord 
> automatically 
> serializes them to yaml. If that''s so why is there a special
option
> called serialize? 
>
> The automatic serialization is just a side effect that everything has to 
be forced into a string before active record will have it. Because Active 
Record doesn''t know that the column is a serialzied one, when you try
and
retrieve the value you''ll just get the raw yaml string. Using serialise
tells Active Record  to unserialize when reading.

Fred

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On Fri, Aug 24, 2012 at 4:35 PM, Frederick Cheung
<frederick.cheung-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
>
> On Friday, August 24, 2012 11:46:35 AM UTC+1, Azhaguselvan SP wrote:
>>
>> Hi,
>>
>> When trying to store a Array or Hash to a string field, ActiveRecord
>> automatically
>> serializes them to yaml. If that''s so why is there a special
option
>> called serialize?
>>
> The automatic serialization is just a side effect that everything has to be
> forced into a string before active record will have it. Because Active
> Record doesn''t know that the column is a serialzied one, when you
try and
> retrieve the value you''ll just get the raw yaml string. Using
serialise
> tells Active Record  to unserialize when reading.
Oops yeah. I was checking this within a rails console without reloading it.
After reloading, the attribute just returns a yaml string.

Thanks for the clarification!



-- 
Azhagu Selvan

http://tamizhgeek.in

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On Friday, 24 August 2012 06:12:02 UTC-5, Azhaguselvan SP wrote:
>
> Oops yeah. I was checking this within a rails console without reloading 
> it. 
> After reloading, the attribute just returns a yaml string. 
>
It also exists so we can build custom serializers, for example I have 
several fields like role which are symbolized and string-ified using a 
serializer and a custom serializer to store an array of tags as a NULL 
hstore hash. 

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