GoLang How to load nested objects using GORM - mysql

Question

Hi let's say that I have 3 Structs in the following format
type Employee struct {
Id int
Name string
CompanyId int `gorm:"column:companyId"`
Company Company `gorm:"foreignKey:CompanyId"`
}
type Company struct {
Id int
CompanyName string
OwnerId `gorm:"column:owner"`
Owner Owner `gorm:"foreignKey:OwnerId"`
}
type Owner struct {
Id int
Name string
Age int
Email string
}
func (E Employee) GetAllEmployees() ([]Employee, error) {
Employees := []Employee
db.Preload("Company").Find(&Employees)
}
// -- -- There response will be like
[
{
id: 1
name: "codernadir"
company: {
id: 5
company_name: "Company"
owner: {
id 0
Name ""
Age 0
Email ""
}
}
}
]
here I'm getting Owner values with the default values.
the given examples are for describing what I'm trying to reach.
I need a way how to load the Owner struct with its values when I load the Employees?
any suggestions will be appreciated and thanks in advance

Answer 1

You can use the gorm:"embedded" tag:
type Employee struct {
Id int
Name string
CompanyId int `gorm:"column:companyId"`
Company Company `gorm:"embedded"`
}
type Company struct {
Id int
CompanyName string
OwnerId `gorm:"column:owner"`
Owner Owner `gorm:"embedded"`
}
type Owner struct {
Id int
Name string
Age int
Email string
}

Answer 2

this is what I found as a solution to load the nested objects from embedded structs
db.Preload("Company").Preload("Company.Owner").Find(&Employees)