-
Notifications
You must be signed in to change notification settings - Fork 0
/
engine.js
162 lines (150 loc) · 5.85 KB
/
engine.js
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
var __slice = [].slice;
function die () {
console.log.apply(console, __slice.call(arguments, 0));
process.exit(1);
}
function say () { console.log.apply(console, __slice.call(arguments, 0)) }
Mutator.name = 'Mutator';
function Mutator() {}
exports.Mutator = Mutator;
Mutator.prototype.raw = function (mutation, operation, callback) {
this.sql(operation.sql, operation.parameters, callback);
};
Mutator.prototype.select = function (mutation, operation, callback) {
mutation.relatable._select(mutation.schema,
mutation.connection,
operation.strings,
operation.parameters,
false,
callback);
};
Mutator.prototype.insertIf = function (mutation, operation, callback) {
var mutator = this,
relatable = mutation.relatable,
table = operation.table,
schema = mutation.schema[operation.schema.toLowerCase()][table.toLowerCase()],
parameters = Object.keys(operation.parameters),
literals = Object.keys(operation.literals),
into = parameters.concat(literals)
.map(function (key) { return relatable._toSQL(key) }),
values = parameters.map(function (_, index) { return mutator._placeholder(index) })
.concat(literals.map(function (key) { operation.literals[key] })),
where = operation.where.map(function (key, index) {
return key + " = " + mutator._placeholder(values.length + index)
}),
dual = mutation.relatable._engine._dual ? "FROM DUAL\n" : "",
sql = "\
INSERT INTO " + qualify(relatable, operation) + " (" + (into.join(", ")) + ")\n\
SELECT " + (values.join(", ")) + "\n\
" + dual +"\
WHERE NOT EXISTS (\n\
SELECT 1\n\
FROM " + qualify(relatable, operation) + "\n\
WHERE " + where.join(" AND ") + "\n\
)\n\
";
values = parameters.map(function (key) {
return operation.parameters[key];
}).concat(operation.where.map(function (key) {
return operation.parameters[key];
}));
sql = mutator._returning(relatable, sql, schema);
mutator.sql(sql, values, function (error, results) {
if (error) callback(error);
else callback(null, mutator._inserted(results, schema));
});
}
function qualify (relatable, operation) {
return operation.schema == 'public'
? relatable._toSQL(operation.table)
: relatable._toSQL(operation.schema) + '.' + relatable._toSQL(operation.table);
}
Mutator.prototype.insert = function (mutation, operation, callback) {
var mutator = this,
relatable = mutation.relatable,
table = operation.table,
schema = mutation.schema[operation.schema.toLowerCase()][table.toLowerCase()],
parameters = Object.keys(operation.parameters),
literals = Object.keys(operation.literals),
into = parameters.concat(literals)
.map(function (key) { return relatable._toSQL(key) }),
values = parameters.map(function (_, index) { return mutator._placeholder(index) })
.concat(literals.map(function (key) { return operation.literals[key] })),
sql = "\
INSERT INTO " + qualify(relatable, operation) + " (" + (into.join(", ")) + ")\n\
VALUES(" + values.join(", ") + ")\n\
";
values = parameters.map(function (key) {
return operation.parameters[key];
});
sql = mutator._returning(relatable, sql, schema);
mutator.sql(sql, values, function (error, results) {
if (error) callback(error);
else callback(null, mutator._inserted(results, schema));
});
};
Mutator.prototype.update = function (mutation, operation, callback) {
var mutator = this,
relatable = mutation.relatable,
table = relatable._toSQL(operation.table),
where = operation.where,
parameters = operation.parameters,
literals ,
setOrder = Object.keys(operation.parameters),
set = [],
whereOrder = Object.keys(operation.where),
where = [],
parameters = [],
exists = {}, sql, key;
mutation.schema[operation.schema.toLowerCase()][table.toLowerCase()].columns.forEach(function (key) {
exists[key.toLowerCase()] = true;
});
for (key in operation.parameters) {
key = relatable._toSQL(key);
if (!exists[key.toLowerCase()]) {
delete operation.parameters[key];
}
}
setOrder.forEach(function (key, index) {
set.push("" + relatable._toSQL(key) + " = " + mutator._placeholder(index));
});
for (key in operation.literals) {
set.push("" + relatable._toSQL(key) + " = " + operation.literals[key]);
}
whereOrder.forEach(function (k, i) {
where.push("" + (relatable._toSQL(k)) + " = " + (mutator._placeholder(setOrder.length + i)));
});
sql = "\
UPDATE " + qualify(relatable, operation) + "\n\
SET " + (set.join(", ")) + "\n\
WHERE " + (where.join(" AND "));
setOrder.forEach(function (key) {
parameters.push(operation.parameters[key]);
});
whereOrder.forEach(function (key) {
parameters.push(operation.where[key]);
});
mutator.sql(sql, parameters, function (error, results) {
if (error) callback(error);
else callback(null, mutator._updated(results));
});
};
Mutator.prototype["delete"] = function (mutation, operation, callback) {
var mutator = this,
relatable = mutation.relatable,
table = operation.table,
where = operation.where,
selected = Object.keys(where),
conditions = selected.map(function (k, i) {
return "" + relatable._toSQL(k) + " = " + mutator._placeholder(i);
}),
sql = "\
DELETE FROM " + qualify(relatable, operation) + "\n\
WHERE " + (conditions.join(" AND ")) + "\n\
",
parameters = selected.map(function (key) { return where[key] });
mutator.sql(sql, parameters, function (error, results) {
if (error) callback(error);
else callback(null, mutator._deleted(results));
});
};