Evgeniy Demin – Medium

Evgeniy Demin

Surprising breaking change during Rails upgrade in sprockets

I have noticed one strange behavior about how Rails serves static files. It looks like a breaking change because I’m upgrading Rails 5.2 to…

4 min readAug 10, 2023

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Surprising breaking change during Rails upgrade in sprockets

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Evgeniy Demin

Rails upgrade led to Ruby bug

Have you ever seen Ruby bugs? I did. Join my short journey on how that happened.

2 min readJun 30, 2023

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Rails upgrade led to Ruby bug

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Evgeniy Demin

Rails upgrade: why it’s hard and a single trick on simplifying it..

I’m working on a Rails upgrade for a giant monolith application. It’s been a while already, and while I’m encountering many issues trying…

4 min readJun 27, 2023

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Rails upgrade: why it’s hard and a single trick on simplifying it..

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Evgeniy Demin
in
Better Programming

The Mysterious Time-to-DateTime Conversion: Unraveling Ruby’s Unexpected Behavior

I recently stumbled upon a perplexing discrepancy while converting Time to DateTime using the #to_datetime method. Intrigued by this…

3 min readMay 22, 2023

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The Mysterious Time-to-DateTime Conversion: Unraveling Ruby’s Unexpected Behavior

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Evgeniy Demin

From Rails Controller to Business Action

Level up your Rails controllers by extracting business logic into reusable, testable, and more organized code units. Learn how in this…

5 min readApr 11, 2023

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From Rails Controller to Business Action

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Evgeniy Demin

Automatic preloading in Rails: the dream that came true.

Stop using includes for resolving N+1 issues. You don’t need it. Use auto-preloading instead, and here is how.

5 min readMar 14, 2023

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Automatic preloading in Rails: the dream that came true.

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Evgeniy Demin

Stop using manual preloading in your Rails application; use this instead.

It’s a popular internet recommendation to use preloading in Ruby on Rails applications to eliminate the N+1 query problem. It may seem like…

3 min readFeb 28, 2023

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Stop using manual preloading in your Rails application; use this instead.

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Evgeniy Demin

Ruby Numbers and the Memory: how I got confused.

I was suddenly doing a simple task to generate a bunch of random integers. There were no strict requirements, so I was thinking about an…

3 min readFeb 21, 2023

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Ruby Numbers and the Memory: how I got confused.

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Evgeniy Demin

Ruby on Rails associations can be buggy

When dealing with has_one associations in the Ruby on Rails ORM framework ActiveRecord, there is a tiny but essential detail. This missing…

4 min readFeb 1, 2023

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Ruby on Rails associations can be buggy

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Evgeniy Demin

Uniqueness validation does not work since the beginning of Ruby on Rails.

This story is about a problem of uniqueness validation in ActiveRecord (Ruby on Rails default ORM). It’s time to solve it once and for…

4 min readJan 19, 2023

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Uniqueness validation does not work since the beginning of Ruby on Rails.

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Evgeniy Demin

Evgeniy Demin

Ruby & Golang practitioner. Remote expert. Open-source contributor. Beginner blogger. Join my network to grow your expertise.

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