From d70e0236df61d69c9299fe63df94da35c87ee2d8 Mon Sep 17 00:00:00 2001 From: Marcelo Silveira Date: Thu, 9 Feb 2012 01:20:52 -0200 Subject: Added where option to add_index to support postgresql partial indices The `add_index` method now supports a `where` option that receives a string with the partial index criteria. add_index(:accounts, :code, :where => "active") Generates CREATE INDEX index_accounts_on_code ON accounts(code) WHERE active --- .../connection_adapters/abstract/schema_statements.rb | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb') diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb index 1f9321edb6..ea6071ea46 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb @@ -381,9 +381,16 @@ module ActiveRecord # # Note: mysql doesn't yet support index order (it accepts the syntax but ignores it) # + # ====== Creating a partial index + # add_index(:accounts, [:branch_id, :party_id], :unique => true, :where => "active") + # generates + # CREATE UNIQUE INDEX index_accounts_on_branch_id_and_party_id ON accounts(branch_id, party_id) WHERE active + # + # Note: only supported by PostgreSQL + # def add_index(table_name, column_name, options = {}) - index_name, index_type, index_columns = add_index_options(table_name, column_name, options) - execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} (#{index_columns})" + index_name, index_type, index_columns, index_options = add_index_options(table_name, column_name, options) + execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} (#{index_columns})#{index_options}" end # Remove the given index from the table. @@ -581,6 +588,9 @@ module ActiveRecord if Hash === options # legacy support, since this param was a string index_type = options[:unique] ? "UNIQUE" : "" index_name = options[:name].to_s if options.key?(:name) + if supports_partial_index? + index_options = options[:where] ? " WHERE #{options[:where]}" : "" + end else index_type = options end @@ -593,7 +603,7 @@ module ActiveRecord end index_columns = quoted_columns_for_index(column_names, options).join(", ") - [index_name, index_type, index_columns] + [index_name, index_type, index_columns, index_options] end def index_name_for_remove(table_name, options = {}) -- cgit v1.2.3