Do you know "in theory" the difference between "includes", "preload", "eager_load" and "joins", but you still think that you need to practice a little more?

Here you will find a set of exercises to help you understand how you can use this 4 methods.

This is are the exercises for the post Examples to learn the difference between preload, includes or eager_load, you can find the answers there.

On /exercises you will find a list of exercises with:

• The description of a task
• And a function to write the results

You should provide a way to fetch the records.

For example:

puts "-----------------------------"
puts "TASK"
puts "1. Fetch all acomodations preloading rooms (with includes)"
puts "-----------------------------"
# accomodations = ?
# display_with_rooms(accomodations)

How to run the examples

1. Create a postgres database with createdb preloading_quiz. As you can see the in db/config.rb the name of the database is hardcoded, so you will need to create a database with that name.

2. Install the dependencies with bundle install.

3. Run the seeds with ruby db/seeds.rb. You can also update the data that you want to use, there.

4. Run the exercises with ruby exercises/01.rb, etc...