pluck_and_select_optimization

🚀 Fetch Specific Columns with pluck and select

Reduce memory usage by loading only needed fields. Use pluck when you only need raw values, and select when you want model instances with partial attributes.

# Get an array of email strings:
emails = User.where(subscribed: true).pluck(:email)

# Load only id and name into User objects:
users = User.select(:id, :name).where('created_at > ?', 1.month.ago)