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
|
require_relative "spec_helper"
describe "Dataset::PlaceholderLiteralizer" do
before do
@c = Sequel::Dataset::PlaceholderLiteralizer
@db = Sequel.mock
@ds = @db[:items]
@h = {:id=>1}
@ds.db.fetch = @h
end
it "should handle calls with no placeholders" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>1)}
loader.first.must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should handle calls with a single placeholder" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.first(1).must_equal @h
loader.first(2).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)", "SELECT * FROM items WHERE (a = 2)"]
end
it "should handle calls with multiple placeholders" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg).where(:b=>Sequel.+(pl.arg, 1)).where(pl.arg)}
loader.first(1, :c, :id=>1).must_equal @h
loader.first(2, :d, :id=>2).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE ((a = 1) AND (b = (c + 1)) AND (id = 1))", "SELECT * FROM items WHERE ((a = 2) AND (b = (d + 1)) AND (id = 2))"]
end
it "should handle calls with placeholders and delayed arguments" do
h = :h
s = :s
d = @ds.having(Sequel.delay{h}).select(Sequel.delay{s})
loader = @c.loader(d){|pl, ds| ds.where(:a=>pl.arg).where(:b=>Sequel.+(pl.arg, 1)).where(pl.arg)}
loader.first(1, :c, :id=>1).must_equal @h
h = :h2
s = :s2
loader.first(2, :d, :id=>2).must_equal @h
@db.sqls.must_equal ["SELECT s FROM items WHERE ((a = 1) AND (b = (c + 1)) AND (id = 1)) HAVING h", "SELECT s2 FROM items WHERE ((a = 2) AND (b = (d + 1)) AND (id = 2)) HAVING h2"]
end
it "should handle calls with placeholders and delayed arguments that take dataset argument" do
d = @ds.select(Sequel.delay{|ds| ds.first_source})
loader = @c.loader(d){|pl, ds| ds.where(:a=>pl.arg).where(:b=>Sequel.+(pl.arg, 1)).where(pl.arg)}
loader.first(1, :c, :id=>1).must_equal @h
loader.first(2, :d, :id=>2).must_equal @h
@db.sqls.must_equal ["SELECT items FROM items WHERE ((a = 1) AND (b = (c + 1)) AND (id = 1))", "SELECT items FROM items WHERE ((a = 2) AND (b = (d + 1)) AND (id = 2))"]
end
it "should handle calls with a placeholders used as filter arguments" do
loader = @c.loader(@ds){|pl, ds| ds.where(pl.arg)}
loader.first(:id=>1).must_equal @h
loader.first(Sequel.expr{a(b)}).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE (id = 1)", "SELECT * FROM items WHERE a(b)"]
end
it "should handle calls with a literal strings used as filter arguments" do
loader = @c.loader(@ds){|pl, ds| ds.where(pl.arg)}
loader.first(Sequel.lit("a = 1")).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should handle calls with a placeholders used as right hand side of condition specifiers" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.first(1).must_equal @h
loader.first([1, 2]).must_equal @h
loader.first(nil).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)", "SELECT * FROM items WHERE (a IN (1, 2))", "SELECT * FROM items WHERE (a IS NULL)"]
end
it "should handle calls with a placeholder used multiple times" do
loader = @c.loader(@ds){|pl, ds| a = pl.arg; ds.where(:a=>a).where(:b=>a)}
loader.first(1).must_equal @h
loader.first(2).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE ((a = 1) AND (b = 1))", "SELECT * FROM items WHERE ((a = 2) AND (b = 2))"]
end
it "should handle calls with a placeholder used multiple times in different capacities" do
loader = @c.loader(@ds){|pl, ds| a = pl.arg; ds.select(a).where(:b=>a)}
loader.first("a").must_equal @h
loader.first(["a = ?", 2]).must_equal @h
@db.sqls.must_equal ["SELECT 'a' FROM items WHERE (b = 'a')", "SELECT ('a = ?', 2) FROM items WHERE (b IN ('a = ?', 2))"]
end
it "should handle calls with manually specified argument positions" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg(1)).where(:b=>pl.arg(0))}
loader.first(1, 2).must_equal @h
loader.first(2, 1).must_equal @h
@db.sqls.must_equal ["SELECT * FROM items WHERE ((a = 2) AND (b = 1))", "SELECT * FROM items WHERE ((a = 1) AND (b = 2))"]
end
it "should handle dataset with row procs" do
@ds = @ds.with_row_proc(proc{|r| {:foo=>r[:id]+1}})
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.first(1).must_equal(:foo=>2)
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should return all rows for #all" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.all(1).must_equal [@h]
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should iterate over block for #all" do
a = []
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.all(1){|r| a << r}.must_equal [@h]
a.must_equal [@h]
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should iterate over block for #each" do
a = []
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.each(1){|r| a << r}
a.must_equal [@h]
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should return first value for #get" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.get(2).must_equal 1
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 2)"]
end
it "should support modifying dataset used on per-call basis with #run" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
loader.with_dataset do |ds|
ds.with_row_proc(lambda{|row| [row]})
end.all(1).must_equal [[@h]]
@db.sqls.must_equal ["SELECT * FROM items WHERE (a = 1)"]
end
it "should literalize args as NULL if :placeholder_literal_null is set" do
loader = @c.loader(@ds){|pl, ds| ds.where(pl.arg=>:a).clone(:placeholder_literal_null=>true)}
loader.sql(1).must_equal "SELECT * FROM items WHERE (NULL = a)"
end
it "should raise an error if called with an incorrect number of arguments" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg)}
proc{loader.first}.must_raise(Sequel::Error)
proc{loader.first(1, 2)}.must_raise(Sequel::Error)
end
it "should raise an error if called with an incorrect number of arguments when manually providing argument positions" do
loader = @c.loader(@ds){|pl, ds| ds.where(:a=>pl.arg(1))}
proc{loader.first}.must_raise(Sequel::Error)
proc{loader.first(1)}.must_raise(Sequel::Error)
proc{loader.first(1, 2, 3)}.must_raise(Sequel::Error)
end
it "should raise an error if argument literalized into a different string than returned by query" do
o = Object.new
def o.wrap(v)
@v = v
self
end
def o.sql_literal(ds)
ds.literal(@v)
end
proc{@c.loader(@ds){|pl, ds| ds.where(o.wrap(pl.arg))}}.must_raise(Sequel::Error)
end
end
|
