```Python hl_lines="10"
{!../../docs_src/query_params_str_validations/tutorial003.py!}
```

## Adicionando expressões regulares

Você pode definir uma <abbr title="Uma expressão regular, regex ou regexp é uma sequência de caracteres que define um parâmetro de busca para textos.">expressão regular</abbr> que combine com um padrão esperado pelo parâmetro:

```Python hl_lines="11"

constraints.Null.message        = {item} muss leer sein.
constraints.Past.message        = {item} muss in der Vergangenheit liegen.
constraints.Pattern.message     = {item} muss dem regulären Ausdruck "{regexp}" entsprechen.
constraints.Size.message        = Die Größe von {item} muss zwischen {min} und {max} liegen.

# ----------------------------------------------------------

{* ../../docs_src/query_params_str_validations/tutorial003.py hl[9] *}

## Ajouter des validations par expressions régulières

On peut définir une <abbr title="Une expression régulière, regex ou regexp est une suite de caractères qui définit un pattern de correspondance pour les chaînes de caractères.">expression régulière</abbr> à laquelle le paramètre doit correspondre :

package gorm

import (
	"context"
	"database/sql"
	"database/sql/driver"
	"fmt"
	"reflect"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"sync"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
)

// Statement statement
type Statement struct {
	*DB
	TableExpr            *clause.Expr
	Table                string
	Model                interface{}

constraints.NotNull.message     = {item} may not be null.
constraints.Null.message        = {item} must be null.
constraints.Past.message        = {item} must be in the past.
constraints.Pattern.message     = {item} must match "{regexp}".
constraints.Size.message        = Size of {item} must be between {min} and {max}.

# ----------------------------------------------------------
#                                        Hibernate Validator

constraints.Min.message = {item}는 {value} 이상으로 하십시오.
constraints.NotNull.message = {item}은 null이면 안됩니다.
constraints.Null.message = {item}는 null이 아니면 안됩니다.
constraints.Past.message = {item}은 과거의 값으로 해야 합니다.
constraints.Pattern.message = {item}가 「{regexp}」 에 일치하지 않습니다.
constraints.Size.message = {item}의 크기는 {min}에서 {max}의 범위합니다.
# ----------------------------------------------------------
# Hibernate Validator
# -------------------

// See the License for the specific language governing permissions and
// limitations under the License.

package ztunnelconfig

import (
	"context"
	"fmt"
	"io"
	"os"
	"regexp"
	"sort"
	"strings"

	"github.com/hashicorp/go-multierror"
	"github.com/spf13/cobra"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"

	dryDB := DB.Session(&gorm.Session{DryRun: true})
	stmt := dryDB.Save(&user).Statement
	if !regexp.MustCompile(`.users.\..deleted_at. IS NULL`).MatchString(stmt.SQL.String()) {
		t.Fatalf("invalid updating SQL, got %v", stmt.SQL.String())
	}

	dryDB = DB.Session(&gorm.Session{DryRun: true})
	stmt = dryDB.Unscoped().Save(&user).Statement
	if !regexp.MustCompile(`WHERE .id. = [^ ]+$`).MatchString(stmt.SQL.String()) {

import (
	"bufio"
	"bytes"
	"encoding/json"
	"fmt"
	"go/ast"
	"go/build"
	"go/parser"
	"go/token"
	"go/types"
	"internal/testenv"
	"io"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"regexp"
	"runtime"
	"sort"
	"strconv"
	"strings"
	"sync"
	"testing"
)

const verbose = false

func goCmd() string {
	var exeSuffix string
	if runtime.GOOS == "windows" {
		exeSuffix = ".exe"

constraints.NotNull.message     = {item} may not be null.
constraints.Null.message        = {item} must be null.
constraints.Past.message        = {item} must be in the past.
constraints.Pattern.message     = {item} must match "{regexp}".
constraints.Size.message        = Size of {item} must be between {min} and {max}.

# ----------------------------------------------------------
#                                        Hibernate Validator