Rails - Nested includes on Active Records?

🎉 Title: Demystifying Nested Includes in Rails Active Records

👋 Hey there, tech enthusiasts! Welcome to another exciting blog post where we dive deep into the world of Rails 🚂. Today, we are going to unravel the mystery of nested includes on Active Records. 🧩

🔎 Problem Statement: Our dear reader had a question regarding fetching a list of events and including every user associated with each event, along with their profiles. 📋 However, despite using the Event.includes(:users [{profile:}]) code snippet, the profiles were missing. 😕

🤔 Understanding the Issue: Now, if you've worked with Rails for a while, you'll know that the includes method is great for eager loading associations. It helps us avoid the infamous N+1 query problem and boosts the performance of our application. But why did the profiles not get included in this case? 🕵️‍♂️ Let's find out!

👣 Finding the Solution: The reason the profiles didn't get included is due to a minor syntax error in the code snippet provided. 😮 Fear not, dear reader, for we have the solution to your problem! 🙌

To correctly include the profiles in the query, you need to modify the code like this:

Event.includes(users: :profile)

✔️ What changed? Instead of using {profile:}, we use :profile in the nested includes statement. This tells Rails to include the profiles associated with the users. 🔄

📚 Further Reading: If you're interested in learning more about Active Record querying or want better insights into how associations work in Rails, I highly recommend checking out the official Rails guides on Active Record Querying. 📖

💡 Key Takeaways: 1️⃣ Use includes for eager loading associations and avoiding N+1 queries. 2️⃣ Correctly nest the includes statement to include deeply associated models. 3️⃣ If in doubt, consult the official Rails guides for comprehensive documentation. 📚

📣 Dive Deeper: Now that you have solved the mystery of nested includes, it's time to put your newfound knowledge into practice and level up your Rails skills. Share your experiences, ask questions, or discuss your favorite Rails tips with our wonderful tech community in the comments below! Let's learn and grow together. 🌟

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