return appendFileterPath(buf, escape(s));
    }

    /**
     * Escapes special regex characters in a string to create a literal pattern.
     * Handles anchor characters (^ and $) specially to preserve their regex meaning.
     *
     * @param s the string to escape
     * @return an escaped regex pattern, or empty string for comments
     */
    protected String escape(final String s) {

        // -------------------------------------------------------------------------------------
        // Alright, here's the justification for all the regexp wizardry below...
        //
        // Continuum and other server-like apps may need to locate the user-level and
        // global-level settings somewhere other than ${user.home} and ${maven.home},

cion","coercedNumber","value","isFinite","makeGetSet","keepTime","set$1","get","month","date","daysInMonth","regexes","match1","match2","match3","match4","match6","match1to2","match3to4","match5to6","match1to3","match1to4","match1to6","matchUnsigned","matchSigned","matchOffset","matchShortOffset","matchWord","addRegexToken","regex","strictRegex","isStrict","getParseRegexForToken","RegExp","regexEscape","matched","p1","p2","p3","p4","s","tokens","addParseToken","addWeekParseToken","_w","indexOf",...

## 🚮 🌅 🔬

👆 💪 🚮 🔢 `min_length`:

{* ../../docs_src/query_params_str_validations/tutorial003.py hl[10] *}

## 🚮 🥔 🧬

👆 💪 🔬 <abbr title="A regular expression, regex or regexp is a sequence of characters that define a search pattern for strings.">🥔 🧬</abbr> 👈 🔢 🔜 🏏:

{* ../../docs_src/query_params_str_validations/tutorial004.py hl[11] *}

👉 🎯 🥔 🧬 ✅ 👈 📨 🔢 💲:

Você também pode incluir um parâmetro `min_length`:

{* ../../docs_src/query_params_str_validations/tutorial003.py hl[10] *}

## 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:

{* ../../docs_src/query_params_str_validations/tutorial004.py hl[11] *}

Now you know that whenever you need them you can use them in **FastAPI**.

### Pydantic v1 `regex` instead of `pattern` { #pydantic-v1-regex-instead-of-pattern }

Before Pydantic version 2 and before FastAPI 0.100.0, the parameter was called `regex` instead of `pattern`, but it's now deprecated.

You could still see some code using it:

//// tab | Pydantic v1

{* ../../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 :

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

## Reguläre Ausdrücke hinzufügen

Sie können einen <abbr title="Ein regulärer Ausdruck, auch regex oder regexp genannt, ist eine Zeichensequenz, die ein Suchmuster für Strings definiert.">Regulären Ausdruck</abbr> `pattern` definieren, mit dem der Parameter übereinstimmen muss:

## 검증 추가

매개변수 `min_length` 또한 추가할 수 있습니다:

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

## 정규식 추가

매개변수와 일치해야 하는 <abbr title="정규표현식(regular expression), regex 또는 regexp는 문자열 조회 패턴을 정의하는 문자들의 순열입니다">정규표현식</abbr>을 정의할 수 있습니다:

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

이 특정 정규표현식은 전달 받은 매개변수 값을 검사합니다:

* `^`: 이전에 문자가 없고 뒤따르는 문자로 시작합니다.

Ви також можете додати параметр `min_length`:

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

## Додавання регулярних виразів

Ви можете визначити <abbr title="Регулярний вираз (regex або regexp) — це послідовність символів, яка визначає шаблон для пошуку в рядках.">регулярний вираз</abbr> pattern, якому має відповідати параметр:

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}