type (
		Level0 struct {
			ID       uint
			Value    string
			Level1ID uint
		}
		Level1 struct {
			ID         uint
			Value      string
			Level2ID   *uint
			Level2_1ID *uint
			Level0s    []Level0 `json:",omitempty"`
		}
		Level2 struct {
			ID       uint
			Level1s  []Level1
			Level3ID uint
		}
		Level2_1 struct {
			ID       uint

	})
}

func TestEmbeddedBelongsTo(t *testing.T) {
	type Country struct {
		ID   int `gorm:"primaryKey"`
		Name string
	}
	type Address struct {
		CountryID int
		Country   Country
	}
	type NestedAddress struct {
		Address
	}
	type CountryMixin struct {
		CountryID int
		Country   Country
	}
	type Org struct {
		ID              int

}

type NullString struct {
	sql.NullString
}

type Point struct {
	X, Y int
}

func (point Point) GormDataType() string {
	return "geo"
}

func (point Point) GormValue(ctx context.Context, db *gorm.DB) clause.Expr {
	return clause.Expr{
		SQL:  "ST_PointFromText(?)",

		t.Errorf("No error should happen, got %v", err)
	}

	type NestedEmbeddedStruct struct {
		NestedEmbeddedIntField            int
		NestedEmbeddedIntFieldWithDefault int `gorm:"default:2"`
	}

	type EmbeddedStruct struct {
		EmbeddedIntField     int
		NestedEmbeddedStruct `gorm:"embedded"`
	}

	type EmbeddedPtrStruct struct {
		EmbeddedPtrIntField   int
		*NestedEmbeddedStruct `gorm:"embedded"`
	}

			f.Readable = true
		})
	}
}

func TestEmbeddedStruct(t *testing.T) {
	type CorpBase struct {
		gorm.Model
		OwnerID string
	}

	type Company struct {
		ID      int
		OwnerID int
		Name    string
		Ignored string `gorm:"-"`
	}

	type Corp struct {
		CorpBase
		Base Company `gorm:"embedded;embeddedPrefix:company_"`
	}

func TestNestedPreloadWithNestedJoin(t *testing.T) {
	type (
		Preload struct {
			ID       uint
			Value    string
			NestedID uint
		}
		Join struct {
			ID       uint
			Value    string
			NestedID uint
		}
		Nested struct {
			ID       uint
			Preloads []*Preload
			Join     Join
			ValueID  uint
		}
		Value struct {
			ID     uint
			Name   string
			Nested Nested
		}
	)

	// do nothing
}

func TestAssociationEmptyQueryClause(t *testing.T) {
	type Organization struct {
		gorm.Model
		Name string
	}
	type Region struct {
		gorm.Model
		Name          string
		Organizations []Organization `gorm:"many2many:region_orgs;"`
	}
	type RegionOrg struct {
		RegionId       uint
		OrganizationId uint
		Empty          myType
	}

	if field, ok := schema.FieldsByDBName[namerColumnName]; ok {
		return field
	}

	return nil
}

// LookUpFieldByBindName looks for the closest field in the embedded struct.
//
//	type Struct struct {
//		Embedded struct {
//			ID string // is selected by LookUpFieldByBindName([]string{"Embedded", "ID"}, "ID")
//		}
//		ID string // is selected by LookUpFieldByBindName([]string{"ID"}, "ID")
//	}

		}
	}
}

// User has many Toys, its `Polymorphic` is `Owner`, Pet has one Toy, its `Polymorphic` is `Owner`
//
//	type User struct {
//	  Toys []Toy `gorm:"polymorphic:Owner;"`
//	}
//	type Pet struct {
//	  Toy Toy `gorm:"polymorphic:Owner;"`
//	}
//	type Toy struct {
//	  OwnerID   int
//	  OwnerType string
//	}
func (schema *Schema) buildPolymorphicRelation(relation *Relationship, field *Field) {

					for i := 0; i < db.Statement.ReflectValue.Len(); i++ {
						obj := db.Statement.ReflectValue.Index(i)
						if reflect.Indirect(obj).Kind() == reflect.Struct {
							appendToElems(obj)
						}
					}
				case reflect.Struct:
					appendToElems(db.Statement.ReflectValue)
				}

				if elems.Len() > 0 {
					assignmentColumns := make([]string, 0, len(rel.References))