method
extract_expression_for_virtual_column
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Class: SchemaDumper
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extract_expression_for_virtual_column(column)
private
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# File activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb, line 68 def extract_expression_for_virtual_column(column) if @connection.mariadb? && @connection.database_version < "10.2.5" create_table_info = @connection.send(:create_table_info, table_name) column_name = @connection.quote_column_name(column.name) if /#{column_name} #{Regexp.quote(column.sql_type)}(?: COLLATE \w+)? AS \((?<expression>.+?)\) #{column.extra}/ =~ create_table_info $~[:expression].inspect end else scope = @connection.send(:quoted_scope, table_name) column_name = @connection.quote(column.name) sql = "SELECT generation_expression FROM information_schema.columns" " WHERE table_schema = #{scope[:schema]}" " AND table_name = #{scope[:name]}" " AND column_name = #{column_name}" # Calling .inspect leads into issues with the query result # which already returns escaped quotes. # We remove the escape sequence from the result in order to deal with double escaping issues. @connection.query_value(sql, "SCHEMA").gsub("\\'", "'").inspect end end