Rails migration for change column
You can also use a block if you have multiple columns to change within a table.
Example:
change_table :table_name do |t| t.change :column_name, :column_type, {options}endSee the API documentation on the Table class for more details.
I'm not aware if you can create a migration from the command line to do all this, but you can create a new migration, then edit the migration to perform this taks.
If tablename is the name of your table, fieldname is the name of your field and you want to change from a datetime to date, you can write a migration to do this.
You can create a new migration with:
rails g migration change_data_type_for_fieldnameThen edit the migration to use change_table:
class ChangeDataTypeForFieldname < ActiveRecord::Migration def self.up change_table :tablename do |t| t.change :fieldname, :date end end def self.down change_table :tablename do |t| t.change :fieldname, :datetime end endendThen run the migration:
rake db:migrate