The Likes Table Problem: Why We Went Polymorphic.

📰 Dev.to · Saurav Dhakal

Learn how to solve the Likes Table problem using polymorphic associations and why it matters for scalable database design

intermediate Published 21 Feb 2026
Action Steps
  1. Identify the problem of having multiple likes tables for different entities
  2. Design a polymorphic association to handle likes for various entities
  3. Implement a single likes table with a polymorphic foreign key
  4. Configure the database to handle the polymorphic relationship
  5. Test the implementation to ensure data consistency and scalability
Who Needs to Know This

Backend developers and database architects can benefit from this approach to improve database scalability and reduce complexity

Key Insight

💡 Using polymorphic associations can simplify database design and improve scalability

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Solve the Likes Table problem with polymorphic associations #database #scalability

Full Article

A few days ago, I was working on adding a Community section to an application. The idea was simple,...
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