tispratik opened a new pull request, #64:
URL: https://github.com/apache/casbin-ex/pull/64
The casbin_rule table has a unique index casbin_rule_content_unique on
(ptype, v0..v6) NULLS NOT DISTINCT. A bare repo.insert raises
Ecto.ConstraintError when a duplicate rule is inserted — e.g. two nodes racing
after an EnforcerServer restart, or in-memory and DB state diverging. That
exception propagates out of handle_call and crashes the EnforcerServer
GenServer, a critical process that is slow to recover.
Patched add_policy/2 and insert_policy/3 (used by save_policies/2) to use
on_conflict: :nothing, which silently skips the duplicate and returns {:ok,
struct}. No data is lost — the rule already exists in the DB.
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