lib/arel/select_manager.rb


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
35

module Arel
  class SelectManager < Arel::TreeManager
    include Arel::Crud

    def initialize engine
      super
      @head   = Nodes::SelectStatement.new
      @ctx    = @head.cores.last
    end

    def from table
      @ctx.froms << table
      self
    end

    def project projection
      @ctx.projections << projection
      self
    end

    def where expr
      @ctx.wheres << expr
      self
    end

    def wheres
      Compatibility::Wheres.new @engine, @ctx.wheres
    end

    def take limit
      @head.limit = limit
      self
    end
  end
end