method

remove_exclusion_constraint

rails latest stable - Class: ActiveRecord::ConnectionAdapters::PostgreSQL::SchemaStatements

remove_exclusion_constraint(table_name, expression = nil, **options)

public

Removes the given exclusion constraint from the table.

remove_exclusion_constraint :products, name: "price_check"

The expression parameter will be ignored if present. It can be helpful to provide this in a migration’s change method so it can be reverted. In that case, expression will be used by #add_exclusion_constraint.

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 716
        def remove_exclusion_constraint(table_name, expression = nil, **options)
          excl_name_to_delete = exclusion_constraint_for!(table_name, expression: expression, **options).name

          at = create_alter_table(table_name)
          at.drop_exclusion_constraint(excl_name_to_delete)

          execute schema_creation.accept(at)
        end

remove_exclusion_constraint

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