So, let's say I'm using pgcrypto and in some circumstances, if a user has
sufficient access, I want to decrypt a column in the select. This is simple
enough when selecting using a single table or model.
So, let's say table1 has a column called crypted_column and I select
pgp_sym_decrypt(crypted_column, key) AS decrypted_column. Pretty simple.
class Table1
def decrypted_column
self[:decrypted_column]
end
end
So, t1 =
Table1.select_append(:pgp_sym_decrypt.sql_function(:crypted_column,
key).as(:decrypted_column)).first gives me t1.decrypted_column =>
"decrypted value"
However, how do I get this value to show up in an eager graph—preferably
without having to update every single instance of the association?
So let's say I have table2, table3, and table4 and they all have either a
many_to_one OR a one_through_one association with table1.
If I do
Table2.eager_graph(:table1).select_append(:pgp_sym_decrypt.sql_function(:crypted_column,
key).as(:decrypted_column)).first I can SEE the correct key in the hash
with the decrypted value, but if I do .all (which gives me the models
rather than a hash of values) where does "decrypted_column" go, where is it
accessible from, and how do I tell the process, "Hey. decrypted_column goes
with table1?"
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