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Ruby on Rails - remove an existing column in a table in ruby on rails - ruby on rails tutorial - rails guides - rails tutorial - ruby rails

To remove existing column name from users table, run the command

rails generate migration RemoveNameFromUsers name:string

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This will generate the below migration:

class RemoveNameFromUsers < ActiveRecord::Migration[5.0]
  def change
    remove_column :users, :name, :string
  end
end

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When the migration name is of the form RemoveYYYFromZZZ followed by list of columns with data types then the generated migration will contain the appropriate remove_column statements.
While it’s not required to specify the data type (e.g. :string) as a parameter to remove_column, it is highly recommended.
If the data type is not specified, then the migration will not be reversible.

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