**Spoiler-Alarm**: Das Tutorial - Benutzerhandbuch enthält:

* Deklaration von **Parametern** von anderen verschiedenen Stellen wie: **Header-Felder**, **Cookies**, **Formularfelder** und **Dateien**.
* Wie man **Validierungseinschränkungen** wie `maximum_length` oder `regex` setzt.

	}

	// Only interested in flushing the size_t not mtime/atime
	if err = Fdatasync(w); err != nil {
		w.Close()
		return err
	}

	// Dealing with error returns from close() - 'man 2 close'
	//
	// A careful programmer will check the return value of close(), since it is quite possible that
	// errors on a previous write(2) operation are reported only on the final close() that releases

Darum müssen wir es in diesem Fall im `response_model`-Parameter deklarieren.

... aber lesen Sie weiter, um zu sehen, wie man das anders lösen kann.

## Rückgabewert und Datenfilterung

Führen wir unser vorheriges Beispiel fort. Wir wollten **die Funktion mit einem Typ annotieren**, aber etwas zurückgeben, das **weniger Daten** enthält.

f?o&fni?srep??sne?t&an?en??vog??m??u&f?r!.&bdnevar,lper,retropno,s&h,revres,?t&ikcats,nempoleved,?xiw,??stad?xamay?y??v!.&a&lnos?ohhnah&k?t???c&a?ouhphnib?uhphniv??di?e&man?rtneb?uhneihtauht??g&n&a&boac?ig&ah?cab?n&a?ei&k?t???uah??nad?rtcos?uqneyut??o&dmal?hpiah?lhniv?nkad?ud&hnib?iah????ro??h&ni&b&aoh?gnauq?hnin?iaht??d&hnib?man??mihcohohphnaht?n&cab?gnauq?yat??tah?vart??tlaeh??i&a!bney?coal?gngnauq?laig?ngnod??onah?rtgnauq??kalkad?m&an&ah?gnauq??oc?utnok??n&a&ehgn?gnol?kcab?uhthni&b?n???e&ibne...

Irgendwann wurde Swagger an die Linux Foundation übergeben und in OpenAPI umbenannt.

Aus diesem Grund spricht man bei Version 2.0 häufig von „Swagger“ und ab Version 3 von „OpenAPI“.

!!! check "Inspirierte **FastAPI**"
    Einen offenen Standard für API-Spezifikationen zu übernehmen und zu verwenden, anstelle eines benutzerdefinierten Schemas.

"det", "at", "en", "den", "til", "er", "som", "på", "de", "med", "han", "af", "for", "ikke", "der", "var", "mig", "sig", "men", "et", "har", "om", "vi", "min", "havde", "ham", "hun", "nu", "over", "da", "fra", "du", "ud", "sin", "dem", "os", "op", "man", "hans", "hvor", "eller", "hvad", "skal", "selv", "her", "alle", "vil", "blev", "kunne", "ind", "når", "være", "dog", "noget", "ville", "jo", "deres", "efter", "ned", "skulle", "denne", "end", "dette", "mit", "også", "under", "have", "dig", "anden",...

"det", "at", "en", "den", "til", "er", "som", "på", "de", "med", "han", "af", "for", "ikke", "der", "var", "mig", "sig", "men", "et", "har", "om", "vi", "min", "havde", "ham", "hun", "nu", "over", "da", "fra", "du", "ud", "sin", "dem", "os", "op", "man", "hans", "hvor", "eller", "hvad", "skal", "selv", "her", "alle", "vil", "blev", "kunne", "ind", "når", "være", "dog", "noget", "ville", "jo", "deres", "efter", "ned", "skulle", "denne", "end", "dette", "mit", "også", "under", "have", "dig", "anden",...

---

Der Hauptpunkt ist, dass **keine** dieser Regeln **in Stein gemeißelt** ist, der man blind folgen muss. Sie können diese Ideen verwenden, um **Ihren eigenen Anwendungsfall zu evaluieren**, zu entscheiden, welcher Ansatz für Ihr System am besten geeignet ist und herauszufinden, wie Sie folgende Konzepte verwalten:

all came different!' Alice replied in a very melancholy voice.

  `Repeat, "YOU ARE OLD, FATHER WILLIAM,"' said the Caterpillar.

  Alice folded her hands, and began:--

    `You are old, Father William,' the young man said,
      `And your hair has become very white;
    And yet you incessantly stand on your head--
      Do you think, at your age, it is right?'

    `In my youth,' Father William replied to his son,

all came different!' Alice replied in a very melancholy voice.

  `Repeat, "YOU ARE OLD, FATHER WILLIAM,"' said the Caterpillar.

  Alice folded her hands, and began:--

    `You are old, Father William,' the young man said,
      `And your hair has become very white;
    And yet you incessantly stand on your head--
      Do you think, at your age, it is right?'

    `In my youth,' Father William replied to his son,