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
|
# frozen_string_literal: true
require "cases/helper"
class ActiveRecord::Relation
class WhereClauseTest < ActiveRecord::TestCase
test "+ combines two where clauses" do
first_clause = WhereClause.new([table["id"].eq(bind_param)], [["id", 1]])
second_clause = WhereClause.new([table["name"].eq(bind_param)], [["name", "Sean"]])
combined = WhereClause.new(
[table["id"].eq(bind_param), table["name"].eq(bind_param)],
[["id", 1], ["name", "Sean"]],
)
assert_equal combined, first_clause + second_clause
end
test "+ is associative, but not commutative" do
a = WhereClause.new(["a"], ["bind a"])
b = WhereClause.new(["b"], ["bind b"])
c = WhereClause.new(["c"], ["bind c"])
assert_equal a + (b + c), (a + b) + c
assert_not_equal a + b, b + a
end
test "an empty where clause is the identity value for +" do
clause = WhereClause.new([table["id"].eq(bind_param)], [["id", 1]])
assert_equal clause, clause + WhereClause.empty
end
test "merge combines two where clauses" do
a = WhereClause.new([table["id"].eq(1)], [])
b = WhereClause.new([table["name"].eq("Sean")], [])
expected = WhereClause.new([table["id"].eq(1), table["name"].eq("Sean")], [])
assert_equal expected, a.merge(b)
end
test "merge keeps the right side, when two equality clauses reference the same column" do
a = WhereClause.new([table["id"].eq(1), table["name"].eq("Sean")], [])
b = WhereClause.new([table["name"].eq("Jim")], [])
expected = WhereClause.new([table["id"].eq(1), table["name"].eq("Jim")], [])
assert_equal expected, a.merge(b)
end
test "merge removes bind parameters matching overlapping equality clauses" do
a = WhereClause.new(
[table["id"].eq(bind_param), table["name"].eq(bind_param)],
[bind_attribute("id", 1), bind_attribute("name", "Sean")],
)
b = WhereClause.new(
[table["name"].eq(bind_param)],
[bind_attribute("name", "Jim")]
)
expected = WhereClause.new(
[table["id"].eq(bind_param), table["name"].eq(bind_param)],
[bind_attribute("id", 1), bind_attribute("name", "Jim")],
)
assert_equal expected, a.merge(b)
end
test "merge allows for columns with the same name from different tables" do
skip "This is not possible as of 4.2, and the binds do not yet contain sufficient information for this to happen"
# We might be able to change the implementation to remove conflicts by index, rather than column name
end
test "a clause knows if it is empty" do
assert WhereClause.empty.empty?
assert_not WhereClause.new(["anything"], []).empty?
end
test "invert cannot handle nil" do
where_clause = WhereClause.new([nil], [])
assert_raises ArgumentError do
where_clause.invert
end
end
test "invert replaces each part of the predicate with its inverse" do
random_object = Object.new
original = WhereClause.new([
table["id"].in([1, 2, 3]),
table["id"].eq(1),
"sql literal",
random_object
], [])
expected = WhereClause.new([
table["id"].not_in([1, 2, 3]),
table["id"].not_eq(1),
Arel::Nodes::Not.new(Arel::Nodes::SqlLiteral.new("sql literal")),
Arel::Nodes::Not.new(random_object)
], [])
assert_equal expected, original.invert
end
test "accept removes binary predicates referencing a given column" do
where_clause = WhereClause.new([
table["id"].in([1, 2, 3]),
table["name"].eq(bind_param),
table["age"].gteq(bind_param),
], [
bind_attribute("name", "Sean"),
bind_attribute("age", 30),
])
expected = WhereClause.new([table["age"].gteq(bind_param)], [bind_attribute("age", 30)])
assert_equal expected, where_clause.except("id", "name")
end
test "ast groups its predicates with AND" do
predicates = [
table["id"].in([1, 2, 3]),
table["name"].eq(bind_param),
]
where_clause = WhereClause.new(predicates, [])
expected = Arel::Nodes::And.new(predicates)
assert_equal expected, where_clause.ast
end
test "ast wraps any SQL literals in parenthesis" do
random_object = Object.new
where_clause = WhereClause.new([
table["id"].in([1, 2, 3]),
"foo = bar",
random_object,
], [])
expected = Arel::Nodes::And.new([
table["id"].in([1, 2, 3]),
Arel::Nodes::Grouping.new(Arel.sql("foo = bar")),
Arel::Nodes::Grouping.new(random_object),
])
assert_equal expected, where_clause.ast
end
test "ast removes any empty strings" do
where_clause = WhereClause.new([table["id"].in([1, 2, 3])], [])
where_clause_with_empty = WhereClause.new([table["id"].in([1, 2, 3]), ""], [])
assert_equal where_clause.ast, where_clause_with_empty.ast
end
test "or joins the two clauses using OR" do
where_clause = WhereClause.new([table["id"].eq(bind_param)], [bind_attribute("id", 1)])
other_clause = WhereClause.new([table["name"].eq(bind_param)], [bind_attribute("name", "Sean")])
expected_ast =
Arel::Nodes::Grouping.new(
Arel::Nodes::Or.new(table["id"].eq(bind_param), table["name"].eq(bind_param))
)
expected_binds = where_clause.binds + other_clause.binds
assert_equal expected_ast.to_sql, where_clause.or(other_clause).ast.to_sql
assert_equal expected_binds, where_clause.or(other_clause).binds
end
test "or returns an empty where clause when either side is empty" do
where_clause = WhereClause.new([table["id"].eq(bind_param)], [bind_attribute("id", 1)])
assert_equal WhereClause.empty, where_clause.or(WhereClause.empty)
assert_equal WhereClause.empty, WhereClause.empty.or(where_clause)
end
private
def table
Arel::Table.new("table")
end
end
end
|
