## Додавання додаткових валідацій

Ви також можете додати параметр `min_length`:

{* ../../docs_src/query_params_str_validations/tutorial003_an_py310.py hl[10] *}

## Додавання регулярних виразів

		&Pet{Name: "pet-slice-append-1"},
		[]*Pet{{Name: "pet-slice-append-2-1"}, {Name: "pet-slice-append-2-2"}},
		&Pet{Name: "pet-slice-append-3"},
	)

	AssertAssociationCount(t, users, "Pets", 10, "After Append")

	// Replace -> same as append
	DB.Model(&users).Association("Pets").Replace(
		[]*Pet{{Name: "pet-slice-replace-1-1"}, {Name: "pet-slice-replace-1-2"}},

	tx.Statement.SetColumn("Price", s.Price+100)
	return nil
}

func (s Product3) BeforeUpdate(tx *gorm.DB) (err error) {
	if tx.Statement.Changed() {
		tx.Statement.SetColumn("Price", s.Price+10)
	}

	if tx.Statement.Changed("Code") {
		s.Price += 20
		tx.Statement.SetColumn("Price", s.Price+30)
	}
	return nil
}

func TestSetColumn(t *testing.T) {
	DB.Migrator().DropTable(&Product3{})

}

// Tests the correctness of constructing XLMetaV1 using jsoniter lib for XLMetaV1 of size 10 parts.
// The result will be compared with the result obtained from json.unMarshal of the byte data.
func TestGetXLMetaV1Jsoniter10(t *testing.T) {
	xlMetaJSON := getXLMetaBytes(10)

	var unMarshalXLMeta xlMetaV1Object
	if err := json.Unmarshal(xlMetaJSON, &unMarshalXLMeta); err != nil {

{* ../../docs_src/query_params_str_validations/tutorial004.py hl[10] *}

Cette expression régulière vérifie que la valeur passée comme paramètre :

* `^` : commence avec les caractères qui suivent, avec aucun caractère avant ceux-là.
* `fixedquery` : a pour valeur exacte `fixedquery`.

        hash = hash * 31 + Objects.hashCode(plugin.getArtifactId());
        hash = hash * 31 + Objects.hashCode(plugin.getVersion());

        hash = hash * 31 + (plugin.isExtensions() ? 1 : 0);

        for (Dependency dependency : plugin.getDependencies()) {
            hash = hash * 31 + Objects.hashCode(dependency.getGroupId());
            hash = hash * 31 + Objects.hashCode(dependency.getArtifactId());

Puedes usar la configuración del modelo de Pydantic para `prohibir` cualquier campo `extra`:

{* ../../docs_src/cookie_param_models/tutorial002_an_py310.py hl[10] *}

Si un cliente intenta enviar algunas **cookies extra**, recibirán un response de **error**.

package tests_test

import (
	"testing"

	. "gorm.io/gorm/utils/tests"
)

func TestGroupBy(t *testing.T) {
	users := []User{{
		Name:     "groupby",
		Age:      10,
		Birthday: Now(),
		Active:   true,
	}, {
		Name:     "groupby",
		Age:      20,
		Birthday: Now(),
	}, {
		Name:     "groupby",
		Age:      30,
		Birthday: Now(),
		Active:   true,
	}, {
		Name:     "groupby1",
		Age:      110,

  - type: dropdown
    id: source

Se por algum motivo você precisar desabilitar a conversão automática de sublinhados para hífens, defina o parâmetro `convert_underscores` de `Header` para `False`:

{* ../../docs_src/header_params/tutorial002_an_py310.py hl[10] *}

/// warning | Atenção

Antes de definir `convert_underscores` como `False`, lembre-se de que alguns proxies e servidores HTTP não permitem o uso de cabeçalhos com sublinhados.

///