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
| 'use strict';
const mysql = require( 'mysql' );
const config = require('../config.js'),
log = require('../utils/logger.js');
var pool = mysql.createPool( {
connectionLimit : config.mysql.connectionLimit,
host : config.mysql.host,
user : config.mysql.user,
password : config.mysql.password,
database : config.mysql.database,
multipleStatements : true //是否允许执行多条sql语句
} );
var add=(table , data )=>{
return new Promise(function(resolve,reject){
pool.getConnection(function(err,connection){
if(err){
log.error('[add getConnection ERROR] - ',err.message);
reject(err);
return;
}
var keys = '';
var values = '';
var params = [];
for(var key in data){
keys += ',' + key;
values += ',?';
params.push(data[key]);
}
var sql = 'INSERT INTO ' + table + '(id' + keys + ') VALUES(0' + values + ')';
connection.query( sql , params , function(error,res){
connection.release();
if(error){
log.error('[add ERROR] - ',err.message);
reject(error);
return;
}
resolve( res );
});
});
});
};
var updateOne=(table , data, ids )=>{
return new Promise(function(resolve,reject){
pool.getConnection(function(err,connection){
if(err){
log.error('[updateOne getConnection ERROR] - ',err.message);
reject(err);
return;
}
var keys = '';
var params = [];
for(var key in data){
if(keys.length > 0) keys += ',';
keys += ' ' + key + ' = ? ';
params.push(data[key]);
}
params.push(ids[1]);
var sql = 'UPDATE ' + table + ' SET ' + keys + ' WHERE ' + ids[0] + ' = ?';
connection.query( sql , params , function(error,res){
connection.release();
if(error){
log.error('[updateOne ERROR] - ',error.message);
reject(error);
return;
}
resolve( res );
});
});
});
};
//将结果已对象数组返回
var find=( sql , ...params )=>{
return new Promise(function(resolve,reject){
pool.getConnection(function(err,connection){
if(err){
log.error('[find getConnection ERROR] - ',err.message);
reject(err);
return;
}
connection.query( sql , params , function(error,res){
connection.release();
if(error){
log.error('[find ERROR] - ',err.message);
reject(error);
return;
}
resolve(res);
});
});
});
};
//返回一个对象
var findOne=( sql , ...params )=>{
return new Promise(function(resolve,reject){
pool.getConnection(function(err,connection){
if(err){
log.error('[findOne getConnection ERROR] - ',err.message);
reject(err);
return;
}
connection.query( sql , params , function(error,res){
connection.release();
if(error){
log.error('[findOne ERROR] - ',err.message);
reject(error);
return;
}
resolve( res[0] || null );
});
});
});
};
var deleteById=(table , id, ...params )=>{
return new Promise(function(resolve,reject){
pool.getConnection(function(err,connection){
if(err){
log.error('[deleteById getConnection ERROR] - ',err.message);
reject(err);
return;
}
var sql = 'DELETE FROM ' + table + ' WHERE id = ' + id;
connection.query( sql , params , function(error,res){
connection.release();
if(error){
log.error('[deleteById ERROR] - ',err.message);
reject(error);
return;
}
resolve( res );
});
});
});
};
//执行代码，返回执行结果
var execute=(sql , ...params )=>{
return new Promise(function(resolve,reject){
pool.getConnection(function(err,connection){
if(err){
log.error('[execute getConnection ERROR] - ',err.message);
reject(err);
return;
}
connection.query( sql , params , function(error,res){
connection.release();
if(error){
log.error('[execute ERROR] - ',err.message);
reject(error);
return;
}
resolve( res );
});
});
});
};
//模块导出
module.exports = {
add : add ,
updateOne : updateOne,
find : find ,
findOne : findOne ,
deleteById : deleteById ,
execute : execute ,
}
|