sharding plugin seems not compatable with gorm.Model well.

[redochenzhen]

my code works well befor using sharding middleware:

func (r *MySQLRepo) PlanExists(id uint) (bool, error) {
    var exists bool
    err := r.db.Model(&entity.StockPlan{}).
        Select("count(*) > 0").
        Where("id = ?", id).
        Find(&exists).
        Error
    return exists, err
}

but the error occurs after registering sharding like this:

db.Use(sharding.Register(sharding.Config{
    ShardingKey:         "title",
    NumberOfShards:      4,
    PrimaryKeyGenerator: sharding.PKSnowflake,
}, "stock_plans"))

and the error is:

Error 1054: Unknown column 'stock_plans.deleted_at' in 'where clause'

[hyperphoton]

var exists bool
err := db.Model(&Order{}).
	Select("count(*) > 0").
	Where("id = ?", int64(10)).
	Find(&exists).
	Error
assert.Equal(t, nil, err)

Above code can not get the error, can you provide more information?