I want to do a column from my table from not null to allow null through rails migrations? How to do this? Do i change the original migration which created the table or write a new one? And what to do in it.
You need change_column
: http://apidock.com/rails/ActiveRecord/ConnectionAdapters/SchemaStatements/change_column
Create a new migration file with this
change_column :my_table, :my_column, :integer, :null => true
Or you can use a specialised command for this ( change_column_null ):
change_column_null :my_table, :my_column, true
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