aboutsummaryrefslogtreecommitdiffstats
path: root/lib/arel/predications.rb
blob: c485de07e3cca495f494166edc1aab050a17f3bb (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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
module Arel
  module Predications
    def not_eq other
      Nodes::NotEqual.new self, other
    end

    def not_eq_any others
      grouping_any :not_eq, others
    end

    def not_eq_all others
      grouping_all :not_eq, others
    end

    def eq other
      Nodes::Equality.new self, other
    end

    def eq_any others
      grouping_any :eq, others
    end

    def eq_all others
      grouping_all :eq, others
    end

    def in other
      case other
      when Arel::SelectManager
        Arel::Nodes::In.new(self, other.ast)
      when Range
        if other.begin == -Float::INFINITY && other.end == Float::INFINITY
          Nodes::NotIn.new self, []
        elsif other.end == Float::INFINITY
          Nodes::GreaterThanOrEqual.new(self, other.begin)
        elsif other.begin == -Float::INFINITY && other.exclude_end?
          Nodes::LessThan.new(self, other.end)
        elsif other.begin == -Float::INFINITY
          Nodes::LessThanOrEqual.new(self, other.end)
        elsif other.exclude_end?
          left  = Nodes::GreaterThanOrEqual.new(self, other.begin)
          right = Nodes::LessThan.new(self, other.end)
          Nodes::And.new [left, right]
        else
          Nodes::Between.new(self, Nodes::And.new([other.begin, other.end]))
        end
      else
        Nodes::In.new self, other
      end
    end

    def in_any others
      grouping_any :in, others
    end

    def in_all others
      grouping_all :in, others
    end

    def not_in other
      case other
      when Arel::SelectManager
        Arel::Nodes::NotIn.new(self, other.ast)
      when Range
        if other.begin == -Float::INFINITY && other.end == Float::INFINITY
          Nodes::In.new self, []
        elsif other.end == Float::INFINITY
          Nodes::LessThan.new(self, other.begin)
        elsif other.begin == -Float::INFINITY && other.exclude_end?
          Nodes::GreaterThanOrEqual.new(self, other.end)
        elsif other.begin == -Float::INFINITY
          Nodes::GreaterThan.new(self, other.end)
        elsif other.exclude_end?
          left  = Nodes::LessThan.new(self, other.begin)
          right = Nodes::GreaterThanOrEqual.new(self, other.end)
          Nodes::Or.new left, right
        else
          left  = Nodes::LessThan.new(self, other.begin)
          right = Nodes::GreaterThan.new(self, other.end)
          Nodes::Or.new left, right
        end
      else
        Nodes::NotIn.new self, other
      end
    end

    def not_in_any others
      grouping_any :not_in, others
    end

    def not_in_all others
      grouping_all :not_in, others
    end

    def matches other
      Nodes::Matches.new self, other
    end

    def matches_any others
      grouping_any :matches, others
    end

    def matches_all others
      grouping_all :matches, others
    end

    def does_not_match other
      Nodes::DoesNotMatch.new self, other
    end

    def does_not_match_any others
      grouping_any :does_not_match, others
    end

    def does_not_match_all others
      grouping_all :does_not_match, others
    end

    def gteq right
      Nodes::GreaterThanOrEqual.new self, right
    end

    def gteq_any others
      grouping_any :gteq, others
    end

    def gteq_all others
      grouping_all :gteq, others
    end

    def gt right
      Nodes::GreaterThan.new self, right
    end

    def gt_any others
      grouping_any :gt, others
    end

    def gt_all others
      grouping_all :gt, others
    end

    def lt right
      Nodes::LessThan.new self, right
    end

    def lt_any others
      grouping_any :lt, others
    end

    def lt_all others
      grouping_all :lt, others
    end

    def lteq right
      Nodes::LessThanOrEqual.new self, right
    end

    def lteq_any others
      grouping_any :lteq, others
    end

    def lteq_all others
      grouping_all :lteq, others
    end

    private

    def grouping_any method_id, others
      nodes = others.map {|expr| send(method_id, expr)}
      Nodes::Grouping.new nodes.inject { |memo,node|
        Nodes::Or.new(memo, node)
      }
    end

    def grouping_all method_id, others
      Nodes::Grouping.new Nodes::And.new(others.map {|expr| send(method_id, expr)})
    end
  end
end