---
title: "ProxyLogger, MIME deprecations, and more fixes"
url: https://daily.dev/posts/proxylogger-mime-deprecations-and-more-fixes-u2zb9fllh
source_url: https://world.hey.com/this.week.in.rails/proxylogger-mime-deprecations-and-more-fixes-0c367d2c
type: article
source: "This Week in Rails"
published: 2026-07-03T14:43:39.582Z
updated: 2026-07-03T14:52:05.859Z
tags: ["postgresql", "rails"]
reading_time: 3
upvotes: 0
comments: 0
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# ProxyLogger, MIME deprecations, and more fixes

**[This Week in Rails](https://daily.dev/sources/twirails)** · 3 min read · 0 upvotes · 0 comments

## Summary

This week's Rails changelog covers several fixes and additions: `add_foreign_key(if_not_exists: true)` is now properly reversible in migrations; `ActiveJob.retry_on` now accepts Float values for `:wait`; a new `ActiveSupport::ProxyLogger` lets you forward logs to another logger at a different severity level; `Mime::SET`, `Mime::LOOKUP`, and `Mime::EXTENSION_LOOKUP` constants are deprecated in favor of public API methods; `Cache#exist?` instrumentation now includes call options in its payload; PostgreSQL timestamp/time column precision is now correctly reported as 6 microseconds by default; and a new product reviews tutorial has been added to the Rails guides.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://world.hey.com/this.week.in.rails/proxylogger-mime-deprecations-and-more-fixes-0c367d2c>

## Similar posts on daily.dev

- [ProxyLogger, MIME deprecations, and more fixes](https://daily.dev/posts/proxylogger-mime-deprecations-and-more-fixes-bupjwrxap) · RUBYLAND · 0 upvotes · 0 comments
- [This Week in Rails: Faster Logs, Reliable Parallel Tests, and Key Deprecations](https://daily.dev/posts/this-week-in-rails-faster-logs-reliable-parallel-tests-and-key-deprecations-vczhuavgw) · RUBYLAND · 0 upvotes · 0 comments
- [Better guides, better framework](https://daily.dev/posts/better-guides-better-framework-u808pzsy9) · Rails · 0 upvotes · 0 comments
- [Better guides, better framework](https://daily.dev/posts/better-guides-better-framework-omtror6i9) · This Week in Rails · 0 upvotes · 0 comments
- [New date time helpers, improved hash methods and more\!](https://daily.dev/posts/new-date-time-helpers-improved-hash-methods-and-more--3dbcfe6bg) · This Week in Rails · 1 upvotes · 0 comments

---

Tags: [#postgresql](https://daily.dev/tags/postgresql), [#rails](https://daily.dev/tags/rails)

[View this post on daily.dev](https://daily.dev/posts/proxylogger-mime-deprecations-and-more-fixes-u2zb9fllh)