Go
go version
go version go1.17 darwin/amd64- Ent: v0.9.1
- MySQL: 5.7
package schema
import (
"time"
"entgo.io/ent"
"entgo.io/ent/schema/field"
)
// User holds the schema definition for the User entity.
type User struct {
ent.Schema
}
// Fields of the User.
func (User) Fields() []ent.Field {
return []ent.Field{
field.String("name").Default("unknown"),
field.Time("created_at").Immutable().Default(time.Now),
}
}
// Edges of the User.
func (User) Edges() []ent.Edge {
return nil
}git clone [email protected]:iwata/ent-issue.git
cd ent-issue
docker compose up -d
go mod download
go run cmd/main.gocmd/main.go executes a simple task, so migrates schema, creates a user, and selects a user.
But it occures an error.
go run cmd/main.go
2021/08/31 20:08:49 failed to get a user: sql: Scan error on column index 2, name "created_at": unsupported Scan, storing driver.Value type []uint8 into type *time.Time
exit status 1And it creates users, but not expected about created_at.
mysql -h 127.0.0.1 -P 3306 -u root -ppass test -e 'desc users'
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | bigint(20) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | | unknown | |
| created_at | timestamp | YES | | NULL | |
+------------+--------------+------+-----+---------+----------------+go run cmd/main.go
select a user successfully
And it should create users looks like below.
mysql -h 127.0.0.1 -P 3306 -u root -ppass test -e 'desc users'
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | bigint(20) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | | unknown | |
| created_at | timestamp | NO | | NULL | |
+------------+--------------+------+-----+---------+----------------+created_at shouldn't be nullable.
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