docs: fix auth hooks plpgsql examples by mandar1045 · Pull Request #50302 · supabase/supabase

mandar1045 · 2026-09-12T11:05:36Z

TL;DR

Fixes a few runtime syntax and type errors in the MFA and password verification auth hook guides.

Problem

The examples currently fail when copied directly into Postgres:

event->'valid' is true causes a jsonb vs. boolean type error.
select into last_failed_at conflicts with the column name.
user_id = event->'user_id' compares a uuid with jsonb.
on conflict do update is missing the required conflict target.
The function is missing the grant execute permission needed for Auth to call it.

Solution

Cast ->> values to ::boolean and ::uuid where needed.
Rename the variable to _last_failed_at to avoid the naming conflict.
Add the appropriate conflict targets: (user_id, factor_id) and (user_id).
Add the missing grant execute permission for supabase_auth_admin.

Testing

Verified everything against Postgres 16, including a valid attempt, the first failed attempt, and a rate-limited retry. All three scenarios now return the expected responses.

Summary by CodeRabbit

Documentation
- Updated MFA and password verification hook examples with explicit JSON value type casting.
- Improved rate-limit handling examples to perform atomic conditional updates and return a 429 response when the limit is reached.
- Clarified timestamp variable naming and conflict-handling behavior.
- Added function execution permission statements for authentication hooks.

github-actions · 2026-09-12T11:05:43Z

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vercel · 2026-09-12T11:05:43Z

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coderabbitai · 2026-09-12T11:06:25Z

No actionable comments were generated in the recent review. 🎉

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📥 Commits

Reviewing files that changed from the base of the PR and between 93d7523 and f8ba188.

📒 Files selected for processing (2)

apps/docs/content/guides/auth/auth-hooks/mfa-verification-hook.mdx
apps/docs/content/guides/auth/auth-hooks/password-verification-hook.mdx

🚧 Files skipped from review as they are similar to previous changes (2)

apps/docs/content/guides/auth/auth-hooks/password-verification-hook.mdx
apps/docs/content/guides/auth/auth-hooks/mfa-verification-hook.mdx

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📝 Walkthrough

Walkthrough

The MFA and password verification hook SQL examples now cast JSONB values to boolean and UUID types, use explicit upsert conflict targets, avoid variable ambiguity, and define function execution permissions.

Changes

Auth hook SQL examples

Layer / File(s)	Summary
Typed event values and upserts `apps/docs/content/guides/auth/auth-hooks/*-verification-hook.mdx`	The examples cast event values to boolean and UUID types, rename the timestamp variable, and specify conflict targets for upserts.
Hook function permissions `apps/docs/content/guides/auth/auth-hooks/*-verification-hook.mdx`	The examples grant execution to `supabase_auth_admin` and revoke it from `authenticated`, `anon`, and `public`.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: awaseem

Merge Risk: ⚪ Minimal · up to f8ba1

No concrete merge-blocking risk remains from the supplied review context.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely identifies the documentation fixes for Auth Hooks PL/pgSQL examples.
Description check	✅ Passed	The description explains the problem, solution, testing, and runtime impact. It is mostly complete, although it does not reproduce every template heading or explicitly confirm that CONTRIBUTING.md was…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@apps/docs/content/guides/auth/auth-hooks/mfa-verification-hook.mdx`:
- Around line 123-130: Update every copy of the MFA verification hook example to
replace the separate _last_failed_at SELECT and unconditional upsert with a
single conditional INSERT ... ON CONFLICT ... DO UPDATE ... WHERE ... RETURNING
statement. Use whether the statement returns a row to decide whether
verification may continue; return the 429 response when it returns no row,
preserving the two-second rate-limit window.

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 26585dd and 93d7523.

📒 Files selected for processing (2)

apps/docs/content/guides/auth/auth-hooks/mfa-verification-hook.mdx
apps/docs/content/guides/auth/auth-hooks/password-verification-hook.mdx

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docs: fix broken PL/pgSQL examples in MFA and password auth hooks

93d7523

mandar1045 requested a review from a team as a code owner September 12, 2026 11:05

vercel Bot temporarily deployed to Preview – kb September 12, 2026 11:05 Inactive

github-actions Bot added the documentation Improvements or additions to documentation label Sep 12, 2026

coderabbitai Bot reviewed Sep 12, 2026

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Comment thread apps/docs/content/guides/auth/auth-hooks/mfa-verification-hook.mdx Outdated

docs: make auth hook rate limit check atomic

f8ba188

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docs: fix auth hooks plpgsql examples - #50302

docs: fix auth hooks plpgsql examples#50302
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