CODEWITHSUNDEEP
ruby-on-rails
OneZero
OneZero

Reputation: 11914

What is an index in migration?

I'm reading the online guide of RoR and saw this piece of code for migration. 

change_table: products do |t|
  #some code here

  t.string :part_number
  t.index :part_number

  #some code here
end

What is the index here? Since I already have a string column called part_number, how come it is possible to add another column with the same name but different type?

Upvotes: 0

Views: 1009

Answers (1)

AdamT
AdamT

Reputation: 6485

It's saying that the part_number will be used as an index. The column's name is not part_number.

Upvotes: 3

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