I've created database and wrote controllers without using UUID's.
While exporting and importing databases, I'm facing these problems

i)  record id's are getting changed while importing and my search
functions are no longer working because I've reference of id's of
other tables, which are changing

example:
db1(product)
db2(db1.id,person)

I've read in Manual that UUID's should be used to reference rather
than Id's. So should I change all my search functions also to search
by uuid and not by id?

ii) How to modify entire existing database to have UUID's apart from
changing model ? I don't want to recreate entire database.



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