gorm enum

1. Define an enum type in Go using the string type.

type Status string

1. Declare constants for each enum value within the defined type.

const (
    Pending   Status = "Pending"
    Approved  Status = "Approved"
    Rejected  Status = "Rejected"
)

1. Create a struct that represents the data model where the enum will be used.

type YourModel struct {
    // other fields
    Status Status
}

1. Use GORM tags to specify the enum field type and constraints in the database.

type YourModel struct {
    // other fields
    Status Status `gorm:"type:enum('Pending', 'Approved', 'Rejected');default:'Pending'"`
}

1. Migrate the model to the database using GORM.

db.AutoMigrate(&YourModel{})

1. When creating or updating records, assign enum values using the declared constants.

newRecord := YourModel{
    // other field assignments
    Status: Approved,
}

db.Create(&newRecord)

1. Query records based on the enum value.

var approvedRecords []YourModel
db.Where("status = ?", Approved).Find(&approvedRecords)

1. Update enum values in records.

db.Model(&yourRecord).Update("status", Rejected)

1. Handle enum values in your application logic based on the declared constants.

if yourRecord.Status == Approved {
    // Perform actions for approved records
}