go-gorm，postgres：简单插入会返回错误

Question

I'm trying to do simple inserts, trying to evaluate the usefulness of Postgres because of this recent hype. I'm a mongoDB guy. And this is what I'm trying to do:

db, e := gorm.Open("postgres", fmt.Sprintf("host=%s user=%s dbname=%s password=%s sslmode=disable", pgHost, pgUser, pgDatabase, pgPass))
if e != nil {
    log.Fatal(e.Error())
}
defer db.Close()
db.AutoMigrate(&model.Customer{}, &model.Email{}, &model.Address{}, &model.Name{}, &model.Logindata{})

name := new(model.Name)
email := new(model.Email)
customer := &model.Customer{
    Name:         name,
    PrimaryEmail: email,
}
customer.Name.First = "Darko"
customer.Name.Last = "Luketic"
customer.Name.Middle = "" // also tried without this line
customer.PrimaryEmail.Address = "[e-mail]"
customer.PrimaryEmail.Verified = true
tx := db.Begin()

if e := tx.Create(name); e != nil {
    tx.Rollback()
    log.Fatal("create name", e.Error)
}

if e := tx.Create(email); e != nil {
    tx.Rollback()
    log.Fatal("create email", e.Error)
}

if e := tx.Create(customer); e != nil {
    tx.Rollback()
    log.Fatal("create customer", e.Error)
}

tx.Commit()

with the models being

package model

import "github.com/jinzhu/gorm"

type Customer struct {
    gorm.Model
    Name            *Name
    BillingAddress  *Address
    ShippingAddress *Address
    PrimaryEmail    *Email
    AlternateEmails []*Email
    Logindata       *Logindata
}

type Name struct {
    gorm.Model
    First  string `json:"first"`
    Middle string `json:"middle"`
    Last   string `json:"last"`
}

type Logindata struct {
    gorm.Model
    Username string
    Password []byte
}

type Email struct {
    gorm.Model
    Address  string
    Verified bool
}

type Address struct {
    gorm.Model
    Address1 string
    Address2 string
    City     string
    Code     string
    Country  string
}

The output:

go run main.go migrate
migrate called
2017/08/01 17:10:26 create name<nil>
exit status 1

What am I doing wrong? Why is there no error message? How do I fix it?

Answer 1

According to the docs, Create returns a *DB, not an error. So your code should be more like

if tx = tx.Create(name); tx.Error != nil { /* ... */ }