Rails Migration to make a column null => true

Question

I had originally created a table with column as

t.string   \"email\",  :default => \"\", :null => false

The requirement has changed and n

Answer 1

Try:

change_column :table_name, :email, :string, :null => true

Answer 2

I could not get the above solution to work with Active Record 4.0.8 and Postgresql 9.3

However change_column_null worked perfectly.

change_column_null :users, :email, true

The reverse has a nice option to update existing records (but not set the default) when null is not allowed.