I'm trying to find a record by email - postgresql

Question

I have the following code.
Handler
func (authHandler *AuthHandler) Login(c *gin.Context) {
var user models.User
c.Bind(&user)
if &user == nil {
c.BindJSON(&user)
}
userObject, err := authHandler.userRepo.FindBy(
models.User{
Email: user.Email,
},
)
if err != nil {
c.JSON(401, gin.H{"_message": "User not found."})
return
}
passErr := bcrypt.CompareHashAndPassword([]byte(userObject.Password), []byte(user.Password))
if passErr != nil {
c.JSON(401, gin.H{"_message": "Password incorrect."})
return
}
token, err := services.CreateToken(userObject)
if err != nil {
c.JSON(401, gin.H{"_message": "Password incorrect."})
return
}
c.JSON(200, gin.H{"token": token, "user": gin.H{
"id": &userObject.ID,
"first_name": &userObject.FirstName,
"last_name": &userObject.LastName,
"email": &userObject.Email,
"avatar": &userObject.Avatar,
"location": &userObject.Location,
"bg_img": &userObject.BgImg,
}})
}
Model
// user.go
type User struct {
ID string `gorm:"primary_key:true"`
FirstName string `form:"first_name" json:"first_name,omitempty"`
LastName string `form:"last_name" json:"last_name,omitempty"`
Password string `form:"password" json:"password" bindind:"required"`
Email string `gorm:"type:varchar(110);unique_index" form:"email" json:"email,omitempty" binding:"required"`
Location string `form:"location" json:"location,omitempty"`
Avatar string `form:"avatar" json:"avatar,omitempty"`
BgImg string `form:"bg_img" json:"bg_img,omitempty"`
CreatedAt time.Time
UpdatedAt time.Time
DeletedAt time.Time
}
func (repo *UserRepo) FindBy(params User) (User, error) {
var user User
err := repo.db.First(&user, "email = ?", params.Email).Error
fmt.Println(err)
if err != nil {
return user, err
}
return user, nil
}
I've tried doing the find in several different ways with no luck. I get a 401 response every time and the fmt.Prinlnt(err) in the model shows an record not found error.

Answer 1

So it turns out I needed to set the DeletedAt field to a null value. Under the hood, GORM automatically checks for a DeletedAt value. I.e SELECT * FROM users WHERE email = 'someone#gmail.com' AND deleted_at IS NULL. However, my DeletedAt fields were automatically being set to a blank date, which technically isn't NULL.
I added a struct...
type NullTime struct {
time.Time
Valid bool
}
Then updated my model...
type User struct {
ID string `gorm:"primary_key:true"`
FirstName string `form:"first_name" json:"first_name,omitempty"`
LastName string `form:"last_name" json:"last_name,omitempty"`
Password string `form:"password" json:"password" bindind:"required"`
Email string `gorm:"type:varchar(110);unique_index" form:"email" json:"email,omitempty" binding:"required"`
Location string `form:"location" json:"location,omitempty"`
Avatar string `form:"avatar" json:"avatar,omitempty"`
BgImg string `form:"bg_img" json:"bg_img,omitempty"`
CreatedAt time.Time
UpdatedAt time.Time
DeletedAt NullTime
}

Answer 2

The convention in 'gorm' is to include the base model in your structs.
// Base Model definition from gomodel.go
type Model struct {
ID uint `gorm:"primary_key"`
CreatedAt time.Time
UpdatedAt time.Time
DeletedAt *time.Time
}
// Your struct
type User struct {
gorm.Model
Name string
}
As you can see, 'gorm' expected a pointer to handle the NULL value.