diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters')
3 files changed, 79 insertions, 59 deletions
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 09ccf0c193..fac9e1cca2 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb @@ -600,7 +600,7 @@ module ActiveRecord # to provide these in a migration's +change+ method so it can be reverted. # In that case, +type+ and +options+ will be used by #add_column. def remove_column(table_name, column_name, type = nil, options = {}) - execute "ALTER TABLE #{quote_table_name(table_name)} DROP #{quote_column_name(column_name)}" + execute "ALTER TABLE #{quote_table_name(table_name)} #{remove_column_for_alter(table_name, column_name, type, options)}" end # Changes the column's definition according to the new options. @@ -1365,6 +1365,20 @@ module ActiveRecord options.is_a?(Hash) && options.key?(:name) && options.except(:name, :algorithm).empty? end + def add_column_for_alter(table_name, column_name, type, options = {}) + td = create_table_definition(table_name) + cd = td.new_column_definition(column_name, type, options) + schema_creation.accept(AddColumnDefinition.new(cd)) + end + + def remove_column_for_alter(table_name, column_name, type = nil, options = {}) + "DROP COLUMN #{quote_column_name(column_name)}" + end + + def remove_columns_for_alter(table_name, *column_names) + column_names.map { |column_name| remove_column_for_alter(table_name, column_name) } + end + def insert_versions_sql(versions) sm_table = quote_table_name(ActiveRecord::SchemaMigration.table_name) diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index ede8a9c1e2..143dc6d08d 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -299,7 +299,7 @@ module ActiveRecord def bulk_change_table(table_name, operations) #:nodoc: sqls = operations.flat_map do |command, args| table, arguments = args.shift, args - method = :"#{command}_sql" + method = :"#{command}_for_alter" if respond_to?(method, true) send(method, table, *arguments) @@ -372,11 +372,11 @@ module ActiveRecord end def change_column(table_name, column_name, type, options = {}) #:nodoc: - execute("ALTER TABLE #{quote_table_name(table_name)} #{change_column_sql(table_name, column_name, type, options)}") + execute("ALTER TABLE #{quote_table_name(table_name)} #{change_column_for_alter(table_name, column_name, type, options)}") end def rename_column(table_name, column_name, new_column_name) #:nodoc: - execute("ALTER TABLE #{quote_table_name(table_name)} #{rename_column_sql(table_name, column_name, new_column_name)}") + execute("ALTER TABLE #{quote_table_name(table_name)} #{rename_column_for_alter(table_name, column_name, new_column_name)}") rename_column_indexes(table_name, column_name, new_column_name) end @@ -671,13 +671,7 @@ module ActiveRecord end end - def add_column_sql(table_name, column_name, type, options = {}) - td = create_table_definition(table_name) - cd = td.new_column_definition(column_name, type, options) - schema_creation.accept(AddColumnDefinition.new(cd)) - end - - def change_column_sql(table_name, column_name, type, options = {}) + def change_column_for_alter(table_name, column_name, type, options = {}) column = column_for(table_name, column_name) type ||= column.sql_type @@ -698,7 +692,7 @@ module ActiveRecord schema_creation.accept(ChangeColumnDefinition.new(cd, column.name)) end - def rename_column_sql(table_name, column_name, new_column_name) + def rename_column_for_alter(table_name, column_name, new_column_name) column = column_for(table_name, column_name) options = { default: column.default, @@ -712,31 +706,23 @@ module ActiveRecord schema_creation.accept(ChangeColumnDefinition.new(cd, column.name)) end - def remove_column_sql(table_name, column_name, type = nil, options = {}) - "DROP #{quote_column_name(column_name)}" - end - - def remove_columns_sql(table_name, *column_names) - column_names.map { |column_name| remove_column_sql(table_name, column_name) } - end - - def add_index_sql(table_name, column_name, options = {}) + def add_index_for_alter(table_name, column_name, options = {}) index_name, index_type, index_columns, _, index_algorithm, index_using = add_index_options(table_name, column_name, options) index_algorithm[0, 0] = ", " if index_algorithm.present? "ADD #{index_type} INDEX #{quote_column_name(index_name)} #{index_using} (#{index_columns})#{index_algorithm}" end - def remove_index_sql(table_name, options = {}) + def remove_index_for_alter(table_name, options = {}) index_name = index_name_for_remove(table_name, options) "DROP INDEX #{quote_column_name(index_name)}" end - def add_timestamps_sql(table_name, options = {}) - [add_column_sql(table_name, :created_at, :datetime, options), add_column_sql(table_name, :updated_at, :datetime, options)] + def add_timestamps_for_alter(table_name, options = {}) + [add_column_for_alter(table_name, :created_at, :datetime, options), add_column_for_alter(table_name, :updated_at, :datetime, options)] end - def remove_timestamps_sql(table_name, options = {}) - [remove_column_sql(table_name, :updated_at), remove_column_sql(table_name, :created_at)] + def remove_timestamps_for_alter(table_name, options = {}) + [remove_column_for_alter(table_name, :updated_at), remove_column_for_alter(table_name, :created_at)] end # MySQL is too stupid to create a temporary table for use subquery, so we have diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb index af13a9e16f..64f08e0ee1 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb @@ -399,51 +399,24 @@ module ActiveRecord end def change_column(table_name, column_name, type, options = {}) #:nodoc: - clear_cache! quoted_table_name = quote_table_name(table_name) - quoted_column_name = quote_column_name(column_name) - sql_type = type_to_sql(type, options) - sql = "ALTER TABLE #{quoted_table_name} ALTER COLUMN #{quoted_column_name} TYPE #{sql_type}".dup - if options[:collation] - sql << " COLLATE \"#{options[:collation]}\"" - end - if options[:using] - sql << " USING #{options[:using]}" - elsif options[:cast_as] - cast_as_type = type_to_sql(options[:cast_as], options) - sql << " USING CAST(#{quoted_column_name} AS #{cast_as_type})" - end - execute sql - - change_column_default(table_name, column_name, options[:default]) if options.key?(:default) - change_column_null(table_name, column_name, options[:null], options[:default]) if options.key?(:null) - change_column_comment(table_name, column_name, options[:comment]) if options.key?(:comment) + sqls, procs = change_column_for_alter(table_name, column_name, type, options) + execute "ALTER TABLE #{quoted_table_name} #{sqls.join(", ")}" + procs.each(&:call) end # Changes the default value of a table column. def change_column_default(table_name, column_name, default_or_changes) # :nodoc: - clear_cache! - column = column_for(table_name, column_name) - return unless column - - default = extract_new_default_value(default_or_changes) - alter_column_query = "ALTER TABLE #{quote_table_name(table_name)} ALTER COLUMN #{quote_column_name(column_name)} %s" - if default.nil? - # <tt>DEFAULT NULL</tt> results in the same behavior as <tt>DROP DEFAULT</tt>. However, PostgreSQL will - # cast the default to the columns type, which leaves us with a default like "default NULL::character varying". - execute alter_column_query % "DROP DEFAULT" - else - execute alter_column_query % "SET DEFAULT #{quote_default_expression(default, column)}" - end + execute "ALTER TABLE #{quote_table_name(table_name)} #{change_column_default_for_alter(table_name, column_name, default_or_changes)}" end def change_column_null(table_name, column_name, null, default = nil) #:nodoc: clear_cache! unless null || default.nil? column = column_for(table_name, column_name) - execute("UPDATE #{quote_table_name(table_name)} SET #{quote_column_name(column_name)}=#{quote_default_expression(default, column)} WHERE #{quote_column_name(column_name)} IS NULL") if column + execute "UPDATE #{quote_table_name(table_name)} SET #{quote_column_name(column_name)}=#{quote_default_expression(default, column)} WHERE #{quote_column_name(column_name)} IS NULL" if column end - execute("ALTER TABLE #{quote_table_name(table_name)} ALTER #{quote_column_name(column_name)} #{null ? 'DROP' : 'SET'} NOT NULL") + execute "ALTER TABLE #{quote_table_name(table_name)} #{change_column_null_for_alter(table_name, column_name, null, default)}" end # Adds comment for given table column or drops it if +comment+ is a +nil+ @@ -679,6 +652,53 @@ module ActiveRecord end end + def change_column_for_alter(table_name, column_name, type, options = {}) + clear_cache! + quoted_column_name = quote_column_name(column_name) + sql_type = type_to_sql(type, options) + sql = "ALTER COLUMN #{quoted_column_name} TYPE #{sql_type}".dup + if options[:collation] + sql << " COLLATE \"#{options[:collation]}\"" + end + if options[:using] + sql << " USING #{options[:using]}" + elsif options[:cast_as] + cast_as_type = type_to_sql(options[:cast_as], options) + sql << " USING CAST(#{quoted_column_name} AS #{cast_as_type})" + end + + sqls = [sql] + procs = [] + sqls << change_column_default_for_alter(table_name, column_name, options[:default]) if options.key?(:default) + sqls << change_column_null_for_alter(table_name, column_name, options[:null], options[:default]) if options.key?(:null) + procs << Proc.new { change_column_comment(table_name, column_name, options[:comment]) } if options.key?(:comment) + + [sqls, procs] + end + + + # Changes the default value of a table column. + def change_column_default_for_alter(table_name, column_name, default_or_changes) # :nodoc: + clear_cache! + column = column_for(table_name, column_name) + return unless column + + default = extract_new_default_value(default_or_changes) + alter_column_query = "ALTER COLUMN #{quote_column_name(column_name)} %s" + if default.nil? + # <tt>DEFAULT NULL</tt> results in the same behavior as <tt>DROP DEFAULT</tt>. However, PostgreSQL will + # cast the default to the columns type, which leaves us with a default like "default NULL::character varying". + alter_column_query % "DROP DEFAULT" + else + alter_column_query % "SET DEFAULT #{quote_default_expression(default, column)}" + end + end + + def change_column_null_for_alter(table_name, column_name, null, default = nil) #:nodoc: + clear_cache! + "ALTER #{quote_column_name(column_name)} #{null ? 'DROP' : 'SET'} NOT NULL" + end + def data_source_sql(name = nil, type: nil) scope = quoted_scope(name, type: type) scope[:type] ||= "'r','v','m'" # (r)elation/table, (v)iew, (m)aterialized view |