pluck
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- What's this?
pluck(column_name)
public
This method is designed to perform select by a single column as direct SQL query Returns Array with values of the specified column name The values has same data type as column.
Examples:
Person.pluck(:id) # SELECT people.id FROM people Person.uniq.pluck(:role) # SELECT DISTINCT role FROM people Person.where(:confirmed => true).limit(5).pluck(:id)
Text improvement
Where it says: without loading a bunch of records should say: without loading a bunch of columns/attributes Considering that record usually is a row.
Text improvement
The statement about not loading a bunch of records is correct because pluck returns an Array of values, not a ActiveRecord::Relation or an Array of Records.
The exact wording though may be:
“…without retrieving from the database unused columns or loading a bunch of records just to grab the attributes you want”