Gorm Create/Save failed with default values

Regard to #5538, clarify testing below:

func TestIssue5538(t *testing.T) {
    type Policy struct {
        gorm.Model
        Name      string `gorm:"unique;unique_index"`
        BoolFalse bool   `gorm:"default:false"`
        BoolTrue  bool   `gorm:"default:true"`
    }

    // Open the Database
    db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
        Logger: logger.Default.LogMode(logger.Info),
        NamingStrategy: schema.NamingStrategy{
            SingularTable: true,
        },
    })
    assert.Nil(t, err)

    // Create the tables
    err = db.AutoMigrate(&Policy{})
    assert.Nil(t, err)

    // Create a new policy with all default settings
    policy1 := Policy{Name: "policy10"}
    result1 := db.Create(&policy1)
    assert.Nil(t, result1.Error)
    assert.Equal(t, uint(1), policy1.ID)
    assert.False(t, policy1.BoolFalse)
    assert.True(t, policy1.BoolTrue)

    policy2 := Policy{Name: "policy20", BoolFalse: true, BoolTrue: false}
    result2 := db.Create(&policy2)
    assert.Nil(t, result2.Error)
    assert.Equal(t, uint(2), policy2.ID)
    assert.True(t, policy2.BoolFalse)
    assert.False(t, policy2.BoolTrue) // NOT RIGHT HERE

    // Save
    policy3 := Policy{Name: "policy30"}
    result3 := db.Save(&policy3)
    assert.Nil(t, result3.Error)
    assert.Equal(t, uint(3), policy3.ID)
    assert.False(t, policy3.BoolFalse)
    assert.True(t, policy3.BoolTrue)

    policy4 := Policy{Name: "policy40", BoolFalse: true, BoolTrue: false}
    result4 := db.Save(&policy4)
    assert.Nil(t, result4.Error)
    assert.Equal(t, uint(4), policy4.ID)
    assert.True(t, policy4.BoolFalse)
    assert.False(t, policy4.BoolTrue) // NOT RIGHT HERE
}

policy2.BoolTrue and policy4.BoolTrue is not right. Is this a bug?

Add playground PR: https://github.com/go-gorm/playground/pull/617

Thanks

Comment From: github-actions[bot]

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Comment From: a631807682

There is no way to know the difference between the bool type is not set and set to false, you can use *bool or sql.NullBool or other custom types.

https://gorm.io/docs/create.html#Default-Values

Comment From: pedia

NOTE You have to setup the default tag for fields having default or virtual/generated value in database, if you want to skip a default value definition when migrating, you could use default:(-)...

It worked. Thanks