Rails: how can I get unique values from column

Question

How can I get unique values from column in the table? For example, I have this Products table:

ID NAME CATEGORY
1 name1 1st_cat
2 name2 2nd_cat
3 name3 1st_c         


        

Answer 1

Try this (in the rails console)

Product.group(:category)

Product.group(:category).each { |p| p.name }