forked from cloudquery/cloudquery
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathdatabase.go
More file actions
193 lines (170 loc) · 4.07 KB
/
database.go
File metadata and controls
193 lines (170 loc) · 4.07 KB
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
181
182
183
184
185
186
187
188
189
190
191
192
193
package database
import (
"fmt"
"github.com/iancoleman/strcase"
"github.com/neo4j/neo4j-go-driver/v4/neo4j"
"gorm.io/driver/mysql"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/driver/sqlserver"
"gorm.io/gorm"
"gorm.io/gorm/logger"
"log"
"net/url"
"reflect"
"strings"
"text/template"
)
type Database struct {
GormDB *gorm.DB
neo4j neo4j.Driver
neo4jKeys []string
neo4jValues []string
Driver string
}
func Open(driver string, dsn string) (*Database, error) {
var err error
gormLogger := logger.Default.LogMode(logger.Error)
r := Database{
Driver: driver,
}
switch driver {
case "sqlite":
r.GormDB, err = gorm.Open(sqlite.Open(dsn), &gorm.Config{
Logger: gormLogger,
})
if err != nil {
return nil, err
}
r.GormDB.Exec("PRAGMA foreign_keys = ON")
sqlDB, err := r.GormDB.DB()
if err != nil {
return nil, err
}
sqlDB.SetMaxOpenConns(1)
case "postgresql":
r.GormDB, err = gorm.Open(postgres.Open(dsn), &gorm.Config{
Logger: gormLogger,
})
case "mysql":
r.GormDB, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
Logger: gormLogger,
})
case "sqlserver":
r.GormDB, err = gorm.Open(sqlserver.Open(dsn), &gorm.Config{
Logger: gormLogger,
})
case "neo4j":
u, err := url.Parse(dsn)
if err != nil {
return nil, err
}
password, _ := u.User.Password()
r.neo4j, err = neo4j.NewDriver(dsn, neo4j.BasicAuth(u.User.Username(), password, ""))
default:
return nil, fmt.Errorf("database driver only supports one of sqlite,postgresql,mysql,sqlserver")
}
if err != nil {
return nil, err
}
return &r, nil
}
func (d *Database) AutoMigrate(dst ...interface{}) error {
if d.GormDB != nil {
return d.GormDB.AutoMigrate(dst...)
}
return nil
}
func getNodeName(v reflect.Value) string {
NodeName := v.Type().Name()
m := v.MethodByName("TableName")
if m.IsValid() {
r := m.Call([]reflect.Value{})
NodeName = r[0].String()
}
return strcase.ToCamel(NodeName)
}
func (d *Database) Delete(dst ...interface{}) {
if d.GormDB != nil {
d.GormDB.Delete(dst[0])
return
}
cypherTpl := `
MATCH (n: {{ .Node }} {
{{- $FieldsLen := len .Fields }}
{{- $FieldsLen = minus $FieldsLen 1 }}
{{- range $index, $element := .Fields }}
{{- if eq $index $FieldsLen }}
{{ $element }}: ${{ $element }}
{{- else }}
{{ $element }}: ${{ $element }},
{{- end }}
{{- end }}
})
DETACH DELETE (n)
`
session := d.neo4j.NewSession(neo4j.SessionConfig{})
defer session.Close()
params := map[string]interface{}{}
for i, key := range d.neo4jKeys {
params[key] = d.neo4jValues[i]
}
for _, nodeStruct := range dst {
var s strings.Builder
nodeName := getNodeName(reflect.ValueOf(nodeStruct).Elem())
t := template.Must(template.New("").Funcs(funcMap).Parse(cypherTpl))
err := t.Execute(&s, map[string]interface{}{
"Node": nodeName,
"Fields": d.neo4jKeys,
})
if err != nil {
log.Fatal(err)
}
_, err = session.Run(s.String(), params)
if err != nil {
log.Fatal(err)
}
}
}
func (d *Database) Where(key string, value string) *Database {
if d.GormDB != nil {
return &Database{
GormDB: d.GormDB.Where(key+" = ?", value),
neo4j: d.neo4j,
neo4jKeys: d.neo4jKeys,
neo4jValues: d.neo4jValues,
}
}
return &Database{
GormDB: d.GormDB,
neo4j: d.neo4j,
neo4jKeys: append(d.neo4jKeys, key),
neo4jValues: append(d.neo4jValues, value),
}
}
const chunkSize = 100
func (d *Database) InsertOne(value interface{}) {
if d.GormDB != nil {
d.GormDB.Create(reflect.ValueOf(value).Interface())
return
}
session := d.neo4j.NewSession(neo4j.SessionConfig{})
defer session.Close()
d.neo4jInsertOne(reflect.ValueOf(value).Elem(), session, nil, "")
}
func (d *Database) ChunkedCreate(value interface{}) {
arr := reflect.ValueOf(value)
if d.GormDB != nil {
for i := 0; i < arr.Len(); i += chunkSize {
end := i + chunkSize
if i+chunkSize > arr.Len() {
end = arr.Len()
}
d.GormDB.Create(arr.Slice(i, end).Interface())
}
return
}
session := d.neo4j.NewSession(neo4j.SessionConfig{})
defer session.Close()
d.neo4jInsertMany(arr, session, nil, "")
}