How to set a default value for a datetime column to record creation time in a migration?

Question

Consider the table creation script below:

create_table :foo do |t|
  t.datetime :starts_at, :null => false
end

Is it\'s possible to set

Answer 1

I usually do:

def change
  execute("
    ALTER TABLE your_table
    ALTER COLUMN your_column
    SET DEFAULT CURRENT_TIMESTAMP
  ")
end

So, your schema.rb is going to have something like:

create_table "your_table", force: :cascade do |t|
  t.datetime "your_column", default: "now()"
end