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Ruby on Rails - changing tables in ruby on rails- ruby on rails tutorial - rails guides - rails tutorial - ruby rails

We have created a table with some wrong schema, then the easiest way to change the columns and their properties is change_table.

Example

change_table :orders do |t|
  t.remove :ordered_at # removes column ordered_at
  t.string :skew_number # adds a new column 
  t.index  :skew_number #creates an index
  t.rename :location, :state #renames location column to state
end

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Above migration changes a table orders.

line-by-line description of the changes

t.remove :ordered_at removes the column ordered_at from the table orders.
t.string :skew_number adding a new string-type column named skew_number in the orders table.
t.index :skew_number adding an index on the skew_number column in the orders table.
t.rename :location, :state renames the location column in the orders table to state.

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