diff options
Diffstat (limited to 'lib/arel/engines/sql/relations/table.rb')
-rw-r--r-- | lib/arel/engines/sql/relations/table.rb | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/lib/arel/engines/sql/relations/table.rb b/lib/arel/engines/sql/relations/table.rb deleted file mode 100644 index b31df7a6d0..0000000000 --- a/lib/arel/engines/sql/relations/table.rb +++ /dev/null @@ -1,100 +0,0 @@ -module Arel - class Table - include Relation, Recursion::BaseCase - - @@engine = nil - @@tables = nil - class << self # FIXME: Do we really need these? - def engine; @@engine; end - def engine= e; @@engine = e; end - - def tables; @@tables; end - def tables= e; @@tables = e; end - end - - attr_reader :name, :engine, :table_alias, :options, :christener - attr_reader :table_exists - alias :table_exists? :table_exists - - def initialize(name, options = {}) - @name = name.to_s - @table_exists = nil - @table_alias = nil - @christener = Sql::Christener.new - @attributes = nil - @matching_attributes = nil - - if options.is_a?(Hash) - @options = options - @engine = options[:engine] || Table.engine - - if options[:as] - as = options[:as].to_s - @table_alias = as unless as == @name - end - else - @engine = options # Table.new('foo', engine) - end - - if @engine.connection - begin - require "arel/engines/sql/compilers/#{@engine.adapter_name.downcase}_compiler" - rescue LoadError - begin - # try to load an externally defined compiler, in case this adapter has defined the compiler on its own. - require "#{@engine.adapter_name.downcase}/arel_compiler" - rescue LoadError - raise "#{@engine.adapter_name} is not supported by Arel." - end - end - - @@tables ||= engine.connection.tables - @table_exists = @@tables.include?(name) || - @engine.connection.table_exists?(name) - end - end - - def as(table_alias) - Table.new(name, options.merge(:as => table_alias)) - end - - def attributes - return @attributes if @attributes - if table_exists? - attrs = columns.collect do |column| - Sql::Attributes.for(column).new(column, self, column.name.to_sym) - end - @attributes = Header.new(attrs) - else - Header.new - end - end - - def column_for(attribute) - has_attribute?(attribute) and columns.detect { |c| c.name == attribute.name.to_s } - end - - def columns - @columns ||= engine.connection.columns(name, "#{name} Columns") - end - - def reset - @columns = nil - @attributes = Header.new([]) - end - - private - def matching_attributes - @matching_attributes ||= Hash[attributes.map { |a| [a.root, true] }] - end - - def has_attribute?(attribute) - matching_attributes.key? attribute.root - end - end -end - -def Table(name, engine = Arel::Table.engine) - Arel::Table.new(name, engine) -end - |