module FakeRecord class Column < Struct.new(:name, :type) end class Connection attr_reader :tables, :columns_hash, :visitor def initialize(visitor) @tables = %w{ users photos developers products} @columns = { 'users' => [ Column.new('id', :integer), Column.new('name', :string), Column.new('bool', :boolean), Column.new('created_at', :date) ], 'products' => [ Column.new('id', :integer), Column.new('price', :decimal) ] } @columns_hash = { 'users' => Hash[@columns['users'].map { |x| [x.name, x] }], 'products' => Hash[@columns['products'].map { |x| [x.name, x] }] } @primary_keys = { 'users' => 'id', 'products' => 'id' } @visitor = visitor end def primary_key name @primary_keys[name.to_s] end def table_exists? name @tables.include? name.to_s end def columns name, message = nil @columns[name.to_s] end def quote_table_name name "\"#{name.to_s}\"" end def quote_column_name name "\"#{name.to_s}\"" end def quote thing, column = nil if column && column.type == :integer return 'NULL' if thing.nil? return thing.to_i end case thing when true "'t'" when false "'f'" when nil 'NULL' when Numeric thing else "'#{thing}'" end end end class ConnectionPool class Spec < Struct.new(:config) end attr_reader :spec, :connection def initialize @spec = Spec.new(:adapter => 'america') @connection = Connection.new(Arel::Visitors::ToSql.new(self)) end def with_connection yield connection end def table_exists? name connection.tables.include? name.to_s end def columns_hash connection.columns_hash end end class Base attr_accessor :connection_pool def initialize @connection_pool = ConnectionPool.new end def connection connection_pool.connection end end end