instance method `change_column_default`

Ruby on Rails 6.0.6

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

change_column_default(table_name, column_name, default_or_changes)

Sets a new default value for a column:

change_column_default(:suppliers, :qualification, 'new')
change_column_default(:accounts, :authorized, 1)

Setting the default to nil effectively drops the default:

change_column_default(:users, :email, nil)

Passing a hash containing :from and :to will make this change reversible in migration:

change_column_default(:posts, :state, from: nil, to: "draft")

Parameters

table_name req
column_name req
default_or_changes req

Source

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 641
      def change_column_default(table_name, column_name, default_or_changes)
        raise NotImplementedError, "change_column_default is not implemented"
      end

Defined in activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb line 641 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::ConnectionAdapters::SchemaStatements

Signature

Parameters