Soft Delete

https://gorm.io/docs/delete.html#Soft-Delete

import "gorm.io/plugin/soft_delete"

type User struct {
  ID        uint
  Name      string
  DeletedAt soft_delete.DeletedAt
}

// Query
SELECT * FROM users WHERE deleted_at = 0;

// Delete
UPDATE users SET deleted_at = /* current unix second */ WHERE ID = 1;

Specify Time Unit

We now support ms and ns timestamp when filling the deleted_at col, only need to specify tag gorm:"softDelete:milli" or gorm:"softDelete:nano".

type User struct {
  ID    uint
  Name  string
  DeletedAt soft_delete.DeletedAt `gorm:"softDelete:milli"`
  // DeletedAt soft_delete.DeletedAt `gorm:"softDelete:nano"`
}

// Query
SELECT * FROM users WHERE deleted_at = 0;

// Delete
UPDATE users SET deleted_at = /* current unix milli second or nano second */ WHERE ID = 1;

Flag Mode

flag mode will use 0, 1 to mark data as deleted or not, 1 means deleted

type User struct {
  ID    uint
  Name  string
  IsDel soft_delete.DeletedAt `gorm:"softDelete:flag"`
}

// Query
SELECT * FROM users WHERE is_del = 0;

// Delete
UPDATE users SET is_del = 1 WHERE ID = 1;

Mixed Mode

mixed mode will use 0, 1 to mark data as deleted or not, 1 means deleted, and store delete time

type User struct {
  ID        uint
  Name      string
  DeletedAt time.Time
  IsDel     soft_delete.DeletedAt `gorm:"softDelete:flag,DeletedAtField:DeletedAt"`
}

// Query
SELECT * FROM users WHERE is_del = 0;

// Delete
UPDATE users SET is_del = 1, deleted_at = /* current unix second */ WHERE ID = 1;

support mixed mode specify time unit, e.g. gorm:"softDelete:flag,DeletedAtField:DeletedAt" or gorm:"softDelete:flag,DeletedAtField:DeletedAt,DeletedAtFieldUnit:milli" or gorm:"softDelete:flag,DeletedAtField:DeletedAt,DeletedAtFieldUnit:nano".

type User struct {
  ID        uint
  Name      string
  DeletedAt int64
  IsDel     soft_delete.DeletedAt `gorm:"softDelete:flag,DeletedAtField:DeletedAt,DeletedAtFieldUnit:milli"`
}

// Query
SELECT * FROM users WHERE is_del = 0;

// Delete
UPDATE users SET is_del = 1, deleted_at = /* current unix milli second second*/ WHERE ID = 1;