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method

alter_table

Importance_0
Ruby on Rails latest stable (v6.1.7.7) - 0 notes - Class: ActiveRecord::ConnectionAdapters::SQLite3Adapter
alter_table( table_name, foreign_keys = foreign_keys(table_name), check_constraints = check_constraints(table_name), **options ) private

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# File activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb, line 358
        def alter_table(
          table_name,
          foreign_keys = foreign_keys(table_name),
          check_constraints = check_constraints(table_name),
          **options
        )
          altered_table_name = "a#{table_name}"

          caller = lambda do |definition|
            rename = options[:rename] || {}
            foreign_keys.each do |fk|
              if column = rename[fk.options[:column]]
                fk.options[:column] = column
              end
              to_table = strip_table_name_prefix_and_suffix(fk.to_table)
              definition.foreign_key(to_table, **fk.options)
            end

            check_constraints.each do |chk|
              definition.check_constraint(chk.expression, **chk.options)
            end

            yield definition if block_given?
          end

          transaction do
            disable_referential_integrity do
              move_table(table_name, altered_table_name, options.merge(temporary: true))
              move_table(altered_table_name, table_name, &caller)
            end
          end
        end
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