type CoolName struct {
Foo string `json:"foo"`
Bar string `json:"bar"`
}
With the Go validator, I want to make only one of these two fields required and give an error if the content of both fields is full.
I used required_without but it only helps with requiring one of them. I can't figure out how can i validate if both fields doesn't have a content at the same time.
i have follow this and work for me,
ref : https://github.com/go-playground/validator/issues/617
type Auth struct {
APIKey string `json:"apiKey" validate:"required_without=Username,required_without=Password"`
Username string `json:"username" validate:"required_without=APIKey"`
Password string `json:"password" validate:"required_without=APIKey"`}
Related
I have the following struct.
type Product struct {
gorm.Model
Code uuid.UUID `gorm:"type:uuid;" json:"code"`
Name string `json:"name" validate:"required"`
Quantity int `json:"qty" validate:"required,min=0"`
}
I want to ensure that when parsing the JSON body, I only receive both name and quantity. If the body has any other fields, e.g. code or any other irrelevant fields, I want the validator to invalidate the JSON given. How can I achieve this with this package: "github.com/go-playground/validator/v10"?
I have managed to use the local context to set database query results using a custom middleware. I am trying to see how I can authenticate a user then pull their details from the database and inject it to the context. This has been done.
The local data on the final method on the route is actually an interface and I would like to extract fields from the data I set from the previous auth middleware. How can I work with this interface type to some form like a struct or json so that I can get the fields and values for doing some logic?
user := c.Locals("user")
fmt.Println("checking for locals",user)
From above user is of struct user
{
Name string `json:"name"`
Emain string `json:"email"`
ID string `json:"id"`
Password string `json:"password"`
}
How can I get the name and email ?
So after digging into the fiber docs and reading about interfaces and especially empty interfaces I think I have a solution but stand to be corrected
I saw one can cast an interface to a concrete type. In my case I would take the c.Locals("user") of type var user interface{}
then cast it to a struct passing the pointer to the user model as follows
user := c.Locals("user")
details, ok :=user.(*models.User)
fmt.Println("checking for locals -----------",details.Name)
I have these 2 structs
type User struct {
gorm.Model
Name string
CompanyID int
Company Company
}
type Company struct {
gorm.Model
Name string
Adress string
}
I want to get users and preload their companies but I don't want to get the Adress field I tried the custom preload like bellow and I tested it in postman . the query returned all the fields but for adress I get an empty string , the reason why this is happening is that when storing the result in the user struct golang automatically initialize all the fields and the field adress get returned with its initial value which is an empty sting
var user []User
db.Table("users").Preload("Company",func(db *gorm.DB) *gorm.DB {
return db.Select("ID" ,"Name")
}).Find(&user)
what should I do to only have the name and id but not the adress
If your server exports the result as json you could add the json tag omitempty as such:
type Company struct {
gorm.Model
Name string
Adress string `json:"omitempty"`
}
That way the address field will not be included if it is an empty string.
I want to create a model User and Social where the User model has many Socials. Ideally a Social type would also have has one relation to simpilify querying from either side. Here is a code sample:
database type is MySQL 8.0
type base struct {
ID string `json:"id" gorm:"type:char(36);primaryKey;"`
Created time.Time `json:"created" gorm:"autoCreateTime"`
Updated time.Time `json:"updated" gorm:"autoUpdateTime"`
}
type User struct {
base
Friends []*User `json:"friends" gorm:"many2many:friends"`
Socials []*Social `json:"socials"`
}
type Social struct {
base
Provider string `json:"provider" gorm:"type:varchar(32);index"`
Identifier string `json:"identifier" gorm:"type:varchar(32);index"`
User *User `json:"user" gorm:"foreignKey:ID"`
Token string `json:"token"`
Link string `json:"link" gorm:"type:varchar(128)"`
}
Im getting the following error when using db.AutoMigrate(&User{}, &Social{}):
model.Social's field User, need to define a valid foreign key for relations or it need to implement the Valuer/Scanner interface
runtime error: invalid memory address or nil pointer dereference
I have tried:
adding gorm:"foreignKey:ID" to User.Socials tags
not using pointers (eg in User struct Socials []Social instead of Socials []*Social)
but the issue remains
According to documentation (https://gorm.io/docs/has_many.html#Has-Many),
you need to use objects, not references
type User struct {
base
Friends []User `json:"friends" gorm:"many2many:friends"`
Socials []Social `json:"socials"`
}
no * here
Also you can add UserID field to Social
type Social struct {
base
UserID string
Provider string `json:"provider" gorm:"type:varchar(32);index"`
Identifier string `json:"identifier" gorm:"type:varchar(32);index"`
User *User `json:"user" gorm:"foreignKey:ID"`
Token string `json:"token"`
Link string `json:"link" gorm:"type:varchar(128)"`
}
and add
type User struct {
base
FriendOf string `gorm:""`
Friends []*User `json:"friends" gorm:"many2many:friends,foreignKey:FriendOf"`
Socials []*Social `json:"socials"`
}
Issue was here:
type base struct {
...
}
type User {
base
...
}
type Social {
base
...
}
Since I thought base would just be package local definition I messed up the capitalization and had a private primary key.
Another issue was touched on by #vodolaz095, but (imo) not sufficiently clarified for any new go-gorm user.
It does not seem to be possible to use a has one relation like User User be the foreign key for a has many relation like Socials []Social gorm:"foreignKey:User". It is required to be split up as #vodolaz095 displayed in his 2nd code block
Using Jinzhu's GORM Package which is fantastic btw, I currently have this struct:
type User struct {
gorm.Model
// The Users username
Username string `gorm:"size:255;unique;not null"`
// The Users email address
Email string `gorm:"size:255;unique;not null"`
// The Users hashed password
Password string `gorm:"size:255;not null"`
// The Users password confirmation (only for forms)
PasswordC string `gorm:"-"`
// The Users FULL NAME (e.g. Burt Reynolds)
Fullname string `gorm:"size:255; not null"`
// The Users Karma level
Karma int
// Is the user banned?
Banned bool
}
But I also use Gorilla's Schema package so any form values populate the struct, but I don't want the PasswordC to be saved into the database because it will be plain text as the normal Password field gets bcrypt'd so any information on how to make GORM not save the PasswordC field.
The docs say gorm:"-", but the code indicates sql:"-" is the correct syntax.
My testing verifies this.
This is no longer correct. The code has been fixed, still use gorm:"-".