GORM get data from both tables on a one to one relationship

Question

I have this two structs on my Go app

type Customer struct {
    ID             uint       `json: "id" gorm:"primary_key"`
    Name           string     `json: "name"`
    AddressId      int        `json: "addressId"`
    Address        Address    `json: "address"`
}

type Address struct {
    ID        uint   `json: "id" gorm:"primary_key"`
    ZipCode   string `json: "zipCode"`
    StreetOne string `json: "streetOne"`
    StreetTwo string `json: "streetTwo"`
    City      string `json: "city"`
    State     string `json: "state"`
    Number    string `json: "number"`
}

I'm using Angular at my front-end, so it would be very practical if I don't have to make two requests to get the Customer then the Address.

I searched in here but couldn't find an example for a one to one relationship, is there a way to make this query get not only the customer data, but also the address?

func (u customer) GetCustomers(params string) ([]models.Customer, error) {
    customers := []models.Customer{}
    u.db.Preload("Addresses").Find(&customers)
    return customers, nil
}

Answer 1

When you use the Preload function, you pass it the name of the field you want to load the data for.

In your case, it should look like this (because your field in the Customer struct is named Address):

u.db.Preload("Address").Find(&customers)

You can check out the documentation for more details.