When you use Active Record in Ruby, it's easy to make some common mistakes. These mistakes can cause problems in your back-end development. Here are some issues to watch out for:
N+1 Query Problem: This happens when you get a list of records and then make extra database calls to get more information about each record. It can slow down your application. To avoid this, always use includes or eager_load to pull in all the related data at once. This makes your program run faster.
Ignoring Validations: If you skip checking the data before saving it, you might end up with bad data in your database. This can lead to problems later. Make sure to set up validations in your models to keep your data clean and reliable.
Not Using Transactions: If something goes wrong and you haven't used transactions, your database could end up in a messy state. To prevent this, use ActiveRecord::Base.transaction when doing important operations. This way, if something fails, everything will go back to how it was before.
Overusing Callbacks: Relying too much on callbacks can make your code confusing and hard to fix. Instead, try to keep the main parts of your program in service objects or controllers. This can help keep your models simple and easy to understand.
By knowing these common mistakes and how to fix them, you can work better with Active Record and improve your skills in managing databases.
When you use Active Record in Ruby, it's easy to make some common mistakes. These mistakes can cause problems in your back-end development. Here are some issues to watch out for:
N+1 Query Problem: This happens when you get a list of records and then make extra database calls to get more information about each record. It can slow down your application. To avoid this, always use includes or eager_load to pull in all the related data at once. This makes your program run faster.
Ignoring Validations: If you skip checking the data before saving it, you might end up with bad data in your database. This can lead to problems later. Make sure to set up validations in your models to keep your data clean and reliable.
Not Using Transactions: If something goes wrong and you haven't used transactions, your database could end up in a messy state. To prevent this, use ActiveRecord::Base.transaction when doing important operations. This way, if something fails, everything will go back to how it was before.
Overusing Callbacks: Relying too much on callbacks can make your code confusing and hard to fix. Instead, try to keep the main parts of your program in service objects or controllers. This can help keep your models simple and easy to understand.
By knowing these common mistakes and how to fix them, you can work better with Active Record and improve your skills in managing databases.