class Arel::Nodes::Node
Abstract base class for all AST nodes
Public Class Methods
Public Instance Methods
Source
# File lib/arel/nodes/node.rb, line 38 def and right Nodes::And.new [self, right] end
Factory method to create an Nodes::And
node.
Source
# File lib/arel/nodes/node.rb, line 54 def each &block return enum_for(:each) unless block_given? ::Arel::Visitors::DepthFirst.new(block).accept self end
Iterate through AST, nodes will be yielded depth-first
Source
# File lib/arel/nodes/node.rb, line 25 def not Nodes::Not.new self end
Factory method to create a Nodes::Not node that has the recipient of the caller as a child.
Source
# File lib/arel/nodes/node.rb, line 32 def or right Nodes::Grouping.new Nodes::Or.new(self, right) end
Factory method to create a Nodes::Grouping
node that has an Nodes::Or node as a child.
Source
# File lib/arel/nodes/node.rb, line 47 def to_sql engine = Table.engine collector = Arel::Collectors::SQLString.new collector = engine.connection.visitor.accept self, collector collector.value end
FIXME: this method should go away. I don’t like people calling to_sql
on non-head nodes. This forces us to walk the AST until we can find a node that has a “relation” member.
Maybe we should just use ‘Table.engine`? :’(