I’ve been looking to make a simple typeadapter based on the HSTORE data
type in postgres to do some value coercion and I have been having some
problems.
I want to coerce the individual values inside my dictionary before they are
put into the postgres HSTORE column and when I select keys, I want to
coerce them back.
What methods do I need to subclass to intercept subkey/indexing operations
as well as full assignment operations?
Normally for a simpler datatype I’d just implement process_bind_param,
process_result_value but that hasn't been working the way I expect it to
with HSTORE.
If it makes the problem simpler I don’t need the MutableExtension to work
so I only need to coerce data on the first assignment to the column.
I'll primarily be selecting data like
Query(MyObjectClass.MyHSTOREType['somekey'])
but occasionally, I may be doing
Query(MyObjectClass.MyHSTOREType)
and would like my postgres->python coercion to work in both scenarios.
Thanks in advance
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