/
mysql.go
541 lines (479 loc) · 14.7 KB
/
mysql.go
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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
package db
import (
"database/sql"
"errors"
"fmt"
"github.com/NeverStopDreamingWang/goi"
"github.com/NeverStopDreamingWang/goi/model"
_ "github.com/go-sql-driver/mysql"
"math"
"reflect"
"strings"
)
type MySQLDB struct {
DB *sql.DB
name string
metaDatabase goi.MetaDataBase
model model.MySQLModel
fields []string
where_sql []string
limit_sql string
order_sql string
sql string
args []interface{}
}
// 连接 MySQL 数据库
func MySQLConnect(UseDataBases ...string) (*MySQLDB, error) {
if len(UseDataBases) == 0 { // 使用默认数据库
UseDataBases = append(UseDataBases, "default")
}
for _, name := range UseDataBases {
database, ok := goi.Settings.DATABASES[name]
if ok == true && strings.ToLower(database.ENGINE) == "mysql" {
databaseObject, err := MetaMySQLConnect(name, database)
if err != nil {
continue
}
return databaseObject, err
}
}
return nil, errors.New("没有连接成功的 MySQL 数据库!")
}
// 连接 MySQL
func MetaMySQLConnect(name string, database goi.MetaDataBase) (*MySQLDB, error) {
connectStr := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", database.USER, database.PASSWORD, database.HOST, database.PORT, database.NAME)
mysqlDB, err := sql.Open(database.ENGINE, connectStr)
return &MySQLDB{
DB: mysqlDB,
name: name,
metaDatabase: database,
model: nil,
fields: nil,
where_sql: nil,
limit_sql: "",
order_sql: "",
sql: "",
args: nil,
}, err
}
// 关闭连接
func (mysqlDB *MySQLDB) Close() error {
err := mysqlDB.DB.Close()
return err
}
// 获取数据库别名
func (mysqlDB *MySQLDB) Name() string {
return mysqlDB.name
}
// 获取数据库配置
func (mysqlDB *MySQLDB) MetaDatabase() goi.MetaDataBase {
return mysqlDB.metaDatabase
}
// 执行语句
func (mysqlDB *MySQLDB) Execute(query string, args ...interface{}) (sql.Result, error) {
// 开启事务
transaction, err := mysqlDB.DB.Begin()
if err != nil {
return nil, err
}
// 执行SQL语句
result, err := transaction.Exec(query, args...)
if err != nil {
rollErr := transaction.Rollback() // 回滚事务
if rollErr != nil {
return result, rollErr
}
return result, err
}
// 提交事务
err = transaction.Commit()
if err != nil {
return result, err
}
return result, err
}
// 查询语句
func (mysqlDB *MySQLDB) Query(query string, args ...interface{}) (*sql.Rows, error) {
rows, err := mysqlDB.DB.Query(query, args...)
if err != nil {
return nil, err
}
return rows, err
}
// 模型迁移
func (mysqlDB *MySQLDB) Migrate(model model.MySQLModel) {
var err error
modelSettings := model.ModelSet()
row := mysqlDB.DB.QueryRow("SELECT COUNT(*) FROM information_schema.tables WHERE table_schema=? AND table_name=?;", mysqlDB.metaDatabase.NAME, modelSettings.TABLE_NAME)
if row.Err() != nil {
panic(fmt.Sprintf("MySQL [%v] 数据库 查询错误错误: %v", mysqlDB.name, row.Err()))
}
var count int
err = row.Scan(&count)
if err != nil {
panic(fmt.Sprintf("MySQL [%v] 数据库 查询错误错误: %v", mysqlDB.name, err))
}
modelType := reflect.TypeOf(model)
if modelType.Kind() == reflect.Ptr {
modelType = modelType.Elem()
}
tampFieldMap := make(map[string]bool)
fieldSqlSlice := make([]string, modelType.NumField(), modelType.NumField())
for i := 0; i < modelType.NumField(); i++ {
field := modelType.Field(i)
fieldName, ok := field.Tag.Lookup("field_name")
if !ok {
fieldName = strings.ToLower(field.Name)
}
fieldType, ok := field.Tag.Lookup("field_type")
tampFieldMap[fieldName] = true
fieldSqlSlice[i] = fmt.Sprintf(" `%v` %v", fieldName, fieldType)
}
createSql := fmt.Sprintf("CREATE TABLE `%v` (\n%v\n)", modelSettings.TABLE_NAME, strings.Join(fieldSqlSlice, ",\n"))
if modelSettings.ENGINE != "" { // 设置存储引擎
createSql += fmt.Sprintf(" ENGINE=%v", modelSettings.ENGINE)
}
if modelSettings.AUTO_INCREMENT != 0 { // 设置自增长起始值
createSql += fmt.Sprintf(" AUTO_INCREMENT=%v", modelSettings.AUTO_INCREMENT)
}
if modelSettings.DEFAULT_CHARSET != "" { // 设置默认字符集
createSql += fmt.Sprintf(" DEFAULT CHARSET=%v", modelSettings.DEFAULT_CHARSET)
}
if modelSettings.COLLATE != "" { // 设置校对规则
createSql += fmt.Sprintf(" COLLATE=%v", modelSettings.COLLATE)
}
if modelSettings.MIN_ROWS != 0 { // 设置最小行数
createSql += fmt.Sprintf(" MIN_ROWS=%v", modelSettings.MIN_ROWS)
}
if modelSettings.MAX_ROWS != 0 { // 设置最大行数
createSql += fmt.Sprintf(" MAX_ROWS=%v", modelSettings.MAX_ROWS)
}
if modelSettings.CHECKSUM != 0 { // 表格的校验和算法
createSql += fmt.Sprintf(" CHECKSUM=%v", modelSettings.CHECKSUM)
}
if modelSettings.DELAY_KEY_WRITE != 0 { // 控制非唯一索引的写延迟
createSql += fmt.Sprintf(" DELAY_KEY_WRITE=%v", modelSettings.DELAY_KEY_WRITE)
}
if modelSettings.ROW_FORMAT != "" { // 设置行的存储格式
createSql += fmt.Sprintf(" ROW_FORMAT=%v", modelSettings.ROW_FORMAT)
}
if modelSettings.DATA_DIRECTORY != "" { // 设置数据存储目录
createSql += fmt.Sprintf(" DATA DIRECTORY='%v'", modelSettings.DATA_DIRECTORY)
}
if modelSettings.INDEX_DIRECTORY != "" { // 设置索引存储目录
createSql += fmt.Sprintf(" INDEX DIRECTORY='%v'", modelSettings.INDEX_DIRECTORY)
}
if modelSettings.PARTITION_BY != "" { // 定义分区方式
createSql += fmt.Sprintf(" PARTITION_BY %v", modelSettings.PARTITION_BY)
}
if modelSettings.COMMENT != "" { // 设置表注释
createSql += fmt.Sprintf(" COMMENT='%v'", modelSettings.COMMENT)
}
if count == 0 { // 创建表
if modelSettings.MigrationsHandler.BeforeFunc != nil { // 迁移之前处理
goi.Log.Info("迁移之前处理...")
err = modelSettings.MigrationsHandler.BeforeFunc()
if err != nil {
panic(fmt.Sprintf("迁移之前处理错误: %v", err))
}
}
goi.Log.Info(fmt.Sprintf("正在迁移 MySQL: %v 数据库: %v 表: %v ...", mysqlDB.name, mysqlDB.metaDatabase.NAME, modelSettings.TABLE_NAME))
_, err = mysqlDB.Execute(createSql)
if err != nil {
panic(fmt.Sprintf("迁移错误: %v", err))
}
if modelSettings.MigrationsHandler.AfterFunc != nil { // 迁移之后处理
goi.Log.Info("迁移之后处理...")
err = modelSettings.MigrationsHandler.AfterFunc()
if err != nil {
panic(fmt.Sprintf("迁移之后处理错误: %v", err))
}
}
}
}
// 设置使用模型
func (mysqlDB *MySQLDB) SetModel(model model.MySQLModel) *MySQLDB {
mysqlDB.model = model
ModelType := reflect.TypeOf(model)
// 获取字段
mysqlDB.fields = make([]string, ModelType.NumField())
for i := 0; i < ModelType.NumField(); i++ {
mysqlDB.fields[i] = ModelType.Field(i).Name
}
return mysqlDB
}
// 插入数据库
func (mysqlDB *MySQLDB) Insert(ModelData model.MySQLModel) (sql.Result, error) {
if mysqlDB.model == nil {
return nil, errors.New("请先设置 SetModel")
}
TableName := mysqlDB.model.ModelSet().TABLE_NAME
ModelValue := reflect.ValueOf(ModelData)
if ModelValue.Kind() == reflect.Ptr {
ModelValue = ModelValue.Elem()
}
insertValues := make([]interface{}, len(mysqlDB.fields))
for i, fieldName := range mysqlDB.fields {
field := ModelValue.FieldByName(fieldName)
if field.Elem().IsValid() {
insertValues[i] = field.Elem().Interface()
} else {
insertValues[i] = field.Interface()
}
}
fieldsSQL := strings.Join(mysqlDB.fields, "`,`")
tempValues := make([]string, len(mysqlDB.fields))
for i := 0; i < len(mysqlDB.fields); i++ {
tempValues[i] = "?"
}
valuesSQL := strings.Join(tempValues, ",")
mysqlDB.sql = fmt.Sprintf("INSERT INTO `%v` (`%v`) VALUES (%v)", TableName, fieldsSQL, valuesSQL)
return mysqlDB.Execute(mysqlDB.sql, insertValues...)
}
// 设置查询字段
func (mysqlDB *MySQLDB) Fields(fields ...string) *MySQLDB {
mysqlDB.fields = fields
return mysqlDB
}
// 查询语句
func (mysqlDB *MySQLDB) Where(query string, args ...interface{}) *MySQLDB {
mysqlDB.where_sql = append(mysqlDB.where_sql, query)
mysqlDB.args = append(mysqlDB.args, args...)
return mysqlDB
}
// 排序
func (mysqlDB *MySQLDB) OrderBy(orders ...string) *MySQLDB {
var orderFields []string
for _, order := range orders {
order = strings.Trim(order, " `'\"")
if order == "" {
continue
}
var sequence string
var orderSQL string
if order[0] == '-' {
orderSQL = order[1:]
sequence = "DESC"
} else {
orderSQL = order
sequence = "ASC"
}
orderFields = append(orderFields, fmt.Sprintf("`%s` %s", orderSQL, sequence))
}
if len(orderFields) > 0 {
mysqlDB.order_sql = fmt.Sprintf(" ORDER BY %s", strings.Join(orderFields, ", "))
} else {
mysqlDB.order_sql = ""
}
return mysqlDB
}
// 排序
func (mysqlDB *MySQLDB) Page(page int, pagesize int) (int, int, error) {
if page <= 0 {
page = 1
}
if pagesize <= 0 {
pagesize = 10 // 默认分页大小
}
offset := (page - 1) * pagesize
mysqlDB.limit_sql = fmt.Sprintf(" LIMIT %d OFFSET %d", pagesize, offset)
total, err := mysqlDB.Count()
totalPages := int(math.Ceil(float64(total) / float64(pagesize)))
return total, totalPages, err
}
// 执行查询语句获取数据
func (mysqlDB *MySQLDB) Select(queryResult interface{}) error {
defer func() {
mysqlDB.where_sql = nil
mysqlDB.limit_sql = ""
mysqlDB.order_sql = ""
mysqlDB.args = nil
}()
if mysqlDB.model == nil {
return errors.New("请先设置 SetModel")
}
TableName := mysqlDB.model.ModelSet().TABLE_NAME
var (
isPtr bool
ItemType reflect.Type
result = reflect.ValueOf(queryResult)
)
if result.Kind() != reflect.Ptr {
return errors.New("queryResult 不是一个指向结构体的指针")
}
result = result.Elem()
if kind := result.Kind(); kind != reflect.Slice {
return errors.New("queryResult 不是一个切片")
}
ItemType = result.Type().Elem() // 获取切片中的元素
if ItemType.Kind() == reflect.Ptr {
isPtr = true
ItemType = ItemType.Elem()
}
queryFields := make([]string, len(mysqlDB.fields))
for i, fieldName := range mysqlDB.fields {
queryFields[i] = strings.ToLower(fieldName)
}
fieldsSQl := strings.Join(queryFields, "`,`")
mysqlDB.sql = fmt.Sprintf("SELECT `%v` FROM `%v`", fieldsSQl, TableName)
if len(mysqlDB.where_sql) > 0 {
mysqlDB.sql += fmt.Sprintf(" WHERE %v", strings.Join(mysqlDB.where_sql, " AND "))
}
if mysqlDB.order_sql != "" {
mysqlDB.sql += mysqlDB.order_sql
}
if mysqlDB.limit_sql != "" {
mysqlDB.sql += mysqlDB.limit_sql
}
rows, err := mysqlDB.DB.Query(mysqlDB.sql, mysqlDB.args...)
defer rows.Close()
if err != nil {
return err
} else if rows.Err() != nil {
return rows.Err()
}
for rows.Next() {
values := make([]interface{}, len(mysqlDB.fields))
item := reflect.New(ItemType).Elem()
for i, fieldName := range mysqlDB.fields {
values[i] = item.FieldByName(fieldName).Addr().Interface()
}
err = rows.Scan(values...)
if err != nil {
return err
}
if isPtr {
result.Set(reflect.Append(result, item.Addr()))
} else {
result.Set(reflect.Append(result, item))
}
}
return nil
}
// 返回第一条数据
func (mysqlDB *MySQLDB) First(queryResult interface{}) error {
defer func() {
mysqlDB.where_sql = nil
mysqlDB.limit_sql = ""
mysqlDB.order_sql = ""
mysqlDB.args = nil
}()
if mysqlDB.model == nil {
return errors.New("请先设置 SetModel")
}
TableName := mysqlDB.model.ModelSet().TABLE_NAME
result := reflect.ValueOf(queryResult)
if result.Kind() != reflect.Ptr {
return errors.New("queryResult 不是一个指向结构体的指针")
}
result = result.Elem()
if kind := result.Kind(); kind != reflect.Struct {
return errors.New("queryResult 不是一个结构体")
}
queryFields := make([]string, len(mysqlDB.fields))
for i, fieldName := range mysqlDB.fields {
queryFields[i] = strings.ToLower(fieldName)
}
fieldsSQl := strings.Join(queryFields, "`,`")
mysqlDB.sql = fmt.Sprintf("SELECT `%v` FROM `%v`", fieldsSQl, TableName)
if len(mysqlDB.where_sql) > 0 {
mysqlDB.sql += fmt.Sprintf(" WHERE %v", strings.Join(mysqlDB.where_sql, " AND "))
}
if mysqlDB.order_sql != "" {
mysqlDB.sql += mysqlDB.order_sql
}
if mysqlDB.limit_sql != "" {
mysqlDB.sql += mysqlDB.limit_sql
}
row := mysqlDB.DB.QueryRow(mysqlDB.sql, mysqlDB.args...)
if row == nil {
return nil
} else if row.Err() != nil {
return row.Err()
}
values := make([]interface{}, len(mysqlDB.fields))
for i, fieldName := range mysqlDB.fields {
values[i] = result.FieldByName(fieldName).Addr().Interface()
}
err := row.Scan(values...)
if err != nil {
return err
}
return nil
}
// 返回查询条数数量
func (mysqlDB *MySQLDB) Count() (int, error) {
if mysqlDB.model == nil {
return 0, errors.New("请先设置 SetModel")
}
TableName := mysqlDB.model.ModelSet().TABLE_NAME
mysqlDB.sql = fmt.Sprintf("SELECT count(*) FROM `%v`", TableName)
if len(mysqlDB.where_sql) > 0 {
mysqlDB.sql += fmt.Sprintf(" WHERE %v", strings.Join(mysqlDB.where_sql, " AND "))
}
row := mysqlDB.DB.QueryRow(mysqlDB.sql, mysqlDB.args...)
if row == nil {
return 0, nil
} else if row.Err() != nil {
return 0, row.Err()
}
var count int
err := row.Scan(&count)
if err != nil {
return 0, err
}
return count, nil
}
// 更新数据,返回操作条数
func (mysqlDB *MySQLDB) Update(ModelData model.MySQLModel) (sql.Result, error) {
defer func() {
mysqlDB.where_sql = nil
mysqlDB.args = nil
}()
if mysqlDB.model == nil {
return nil, errors.New("请先设置 SetModel 表")
}
TableName := mysqlDB.model.ModelSet().TABLE_NAME
ModelValue := reflect.ValueOf(ModelData)
if ModelValue.Kind() == reflect.Ptr {
ModelValue = ModelValue.Elem()
}
// 字段
updateFields := make([]string, 0)
// 值
updateValues := make([]interface{}, 0)
for _, fieldName := range mysqlDB.fields {
field := ModelValue.FieldByName(fieldName)
if field.Kind() == reflect.Ptr {
field = field.Elem()
}
if field.IsValid() {
fieldValue := field.Interface()
updateFields = append(updateFields, fmt.Sprintf("`%v`=?", strings.ToLower(fieldName)))
updateValues = append(updateValues, fieldValue)
}
}
fieldsSQl := strings.Join(updateFields, ",")
mysqlDB.sql = fmt.Sprintf("UPDATE `%v` SET %v", TableName, fieldsSQl)
if len(mysqlDB.where_sql) > 0 {
mysqlDB.sql += fmt.Sprintf(" WHERE %v", strings.Join(mysqlDB.where_sql, " AND "))
}
updateValues = append(updateValues, mysqlDB.args...)
return mysqlDB.Execute(mysqlDB.sql, updateValues...)
}
// 删除数据,返回操作条数
func (mysqlDB *MySQLDB) Delete() (sql.Result, error) {
defer func() {
mysqlDB.where_sql = nil
mysqlDB.args = nil
}()
if mysqlDB.model == nil {
return nil, errors.New("请先设置 SetModel 表")
}
TableName := mysqlDB.model.ModelSet().TABLE_NAME
mysqlDB.sql = fmt.Sprintf("DELETE FROM `%v`", TableName)
if len(mysqlDB.where_sql) > 0 {
mysqlDB.sql += fmt.Sprintf(" WHERE %v", strings.Join(mysqlDB.where_sql, " AND "))
}
return mysqlDB.Execute(mysqlDB.sql, mysqlDB.args...)
}