How to save array of structs - postgresql

Question

I am trying to save an Array of Structs.
I tried:
type ShiftValue struct {
Hour uint8 `json:"hour"`
Minute uint8 `json:"minute"`
}
type Shift struct {
Start ShiftValue `json:"start"`
End ShiftValue `json:"end"`
}
type Config struct {
ID uuid.UUID `gorm:"type:uuid;primary_key;index;" json:"id"`
CreatedAt time.Time `json:"created_at"`
UpdatedAt time.Time `json:"updated_at"`
DeletedAt *time.Time `json:"deleted_at,omitempty"`
Shifts []Shift `gorm:"type:varchar(100)[];" json:"shifts,"`
}
But is not working. I also tried to save Shifts as pq.StringArray:
type Config struct {
ID uuid.UUID `gorm:"type:uuid;primary_key;index;" json:"id"`
CreatedAt time.Time `json:"created_at"`
UpdatedAt time.Time `json:"updated_at"`
DeletedAt *time.Time `json:"deleted_at,omitempty"`
Shifts pq.StringArray `gorm:"type:varchar(100)[];" json:"shifts,"`
}
Which is kind of working, but I don't know how can I convert a slice of Shift to StringArray.
Should I use GenericArrray?
How can I make the conversion from Slice to GenericArray or StringArray?
When I Unmarshall the data, I do it in the following struct, I validate the data, and after that I want to save it to Database:
type ConfigUpdate struct {
Shifts []Shift `json:"shifts,"`
}

Answer 1

The nearest scenario that can be seen in gorm embedded struct test is
package gorm_test
import "testing"
type BasePost struct {
Id int64
Title string
URL string
}
type Author struct {
ID string
Name string
Email string
}
type HNPost struct {
BasePost
Author `gorm:"embedded_prefix:user_"` // Embedded struct
Upvotes int32
}
type EngadgetPost struct {
BasePost BasePost `gorm:"embedded"`
Author Author `gorm:"embedded;embedded_prefix:author_"` // Embedded struct
ImageUrl string
}
As can be seen, all of these Base Struct have Id to be referred to as foreign key in parent struct.
One more scenario that can be found handled in one of StackOverflow another answer.
type Children struct {
Lat float64
Lng float64
}
type ChildArray []Children
func (sla *ChildArray) Scan(src interface{}) error {
return json.Unmarshal(src.([]byte), &sla)
}
func (sla ChildArray) Value() (driver.Value, error) {
val, err := json.Marshal(sla)
return string(val), err
}
type Parent struct {
*gorm.Model
Childrens ChildArray `gorm:"column:childrens;type:longtext"`
}
Please verify it on your own as I don't have a gorm set up. I just did the R & D part. I hope, it will help many of us. thanks