How do you do UUID in Golangs Gorm?

Question

For postgresql, here is what I did:

Use uuid.UUID (from “github.com/google/uuid”), as type,
e.g

ID       uuid.UUID `gorm:"type:uuid;default:uuid_generate_v4()"`

Add uuid-ossp extension for postgres database,
e.g
```
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
```
Then, when you call DB’s Create() method, the uuid is generated automatically.

Update: pg14+ `gen_random_uuid()`

(as mentioned in Doron Segal‘s comment)

pg 14 has built-in function gen_random_uuid() to generate uuid v4, e.g:

create table:

create table uuid_test (uid text default gen_random_uuid());

insert a row:

insert into uuid_test(uid) values (DEFAULT);

Then uid column is generated automatically.

Similiar, in go you can use the function as defaul value I think, e.g:

ID uuid.UUID gorm:"type:uuid;default:gen_random_uuid()"

BTW, the gen_random_uuid() function only support uuid v4 now, to use other versions, you still need uuid-ossp extension.