mirror of
https://gitee.com/johng/gf
synced 2026-06-06 02:25:47 +08:00
f24729206b
error log
```
2025-06-18T15:36:08.315+08:00 [DEBU] {10a3b0cfd9124a186b89b07f50e67ce6} [ 0 ms] [default] [db_0] [rows:1 ] SELECT `id`,`custom_name` FROM `custom` WHERE `id`=1 LIMIT 1
2025-06-18T15:36:09.259+08:00 [DEBU] {10a3b0cfd9124a186b89b07f50e67ce6} [ 1 ms] [default] [db_0] [rows:1 ] SELECT `id`,`custom_name`,`remark`FROM `custom` WHERE `id`=2 LIMIT 1
```
right log
```
2025-06-18T15:36:08.315+08:00 [DEBU] {10a3b0cfd9124a186b89b07f50e67ce6} [ 0 ms] [default] [db_0] [rows:1 ] SELECT `id`,`custom_name` FROM `custom` WHERE `id`=1 LIMIT 1
2025-06-18T15:36:09.259+08:00 [DEBU] {10a3b0cfd9124a186b89b07f50e67ce6} [ 1 ms] [default] [db_1] [rows:1 ] SELECT `id`,`custom_name`,`remark`FROM `custom` WHERE `id`=2 LIMIT 1
```
```
type DbShardingRule struct {
}
func (d *DbShardingRule) SchemaName(ctx context.Context, config gdb.ShardingSchemaConfig, value any) (string, error) {
if name, ok := value.(string); ok && (len(name) > 0) && gstr.HasPrefix(name, config.Prefix) {
return name, nil
}
return "default", nil
}
func (d *DbShardingRule) TableName(ctx context.Context, config gdb.ShardingTableConfig, value any) (string, error) {
return "", nil
}
```
```
config := gdb.ShardingConfig{
Schema: gdb.ShardingSchemaConfig{
Enable: true,
Prefix: "db_",
Rule: &DbShardingRule{},
},
}
dao.Custom.Ctx(ctx).Sharding(config).ShardingValue("db_0").Where("id", 1).One()
dao.Custom.Ctx(ctx).Sharding(config).ShardingValue("db_1").Where("id", 2).One()
```
我有两个完全一样的数据库db_0和db_1，两个custom表里都只有一条数据，id是1和2，执行上面两条查询得的结果是正确的，
输出日志中应该分别是`[default] [db_0]`和`[default] [db_1]`，但是实际输出的都是`[default]
[db_0]`，
查看具体代码实现，该日志由Core实例中获取group和schema构成，而实际执行sql时如果使用了分库特性那么执行sql的link会使用当前面schema重新生成，但是没有重新赋给Core实例，所以输出日志的时候还是错的，只需要在生成link后生成日志前把schema赋给Core就行，方法执行完成后defer将schema重置回去，防止有人重复使用同一个gdb对象造成困扰
A powerful framework for faster, easier, and more efficient project development.
Documentation
- GoFrame Official Site: https://goframe.org
- GoFrame Official Site(en): https://goframe.org/en
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- GoDoc API: https://pkg.go.dev/github.com/gogf/gf/v2
Contributors
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License
GoFrame is licensed under the MIT License, 100% free and open-source, forever.