aboutsummaryrefslogtreecommitdiffstats
path: root/lib/arel/visitors/bind_visitor.rb
blob: 5cb251ffdece0b88587f8131edf382f6cf182618 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
module Arel
  module Visitors
    module BindVisitor
      def initialize target
        @block = nil
        super
      end

      def accept node, &block
        @block = block if block_given?
        super
      end

      private

      def visit_Arel_Nodes_Assignment o
        if o.right.is_a? Arel::Nodes::BindParam
          "#{visit o.left} = #{visit o.right}"
        else
          super
        end
      end

      def visit_Arel_Nodes_BindParam o
        if @block
          @block.call
        else
          super
        end
      end

    end
  end
end