**FastAPI** has a very powerful but intuitive **<dfn title="also known as components, resources, providers, services, injectables">Dependency Injection</dfn>** system.

It is designed to be very simple to use, and to make it very easy for any developer to integrate other components with **FastAPI**.

## What is "Dependency Injection" { #what-is-dependency-injection }

Later you will see how **powerful** it can be.

/// tip

The fact that this is **standard Python** means that you will still get the **best possible developer experience** in your editor, with the tools you use to analyze and refactor your code, etc. ✨

And also that your code will be very compatible with many other Python tools and libraries. 🚀

///

///

### 콜백 라우터 추가하기 { #add-the-callback-router }

이 시점에서, 위에서 만든 콜백 라우터 안에 *콜백 경로 처리(들)*(즉 *external developer*가 *external API*에 구현해야 하는 것들)을 준비했습니다.

이제 *여러분의 API 경로 처리 데코레이터*에서 `callbacks` 파라미터를 사용해, 그 콜백 라우터의 `.routes` 속성(실제로는 routes/*경로 처리*의 `list`)을 전달합니다:

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[33] *}

İleride bunun ne kadar **güçlü** olabildiğini göreceksiniz.

/// tip | İpucu

Bunun **standart Python** olması, editörünüzde mümkün olan **en iyi developer experience**'ı almaya devam edeceğiniz anlamına gelir; kodu analiz etmek ve refactor etmek için kullandığınız araçlarla da, vb. ✨

Ayrıca kodunuzun pek çok başka Python aracı ve kütüphanesiyle çok uyumlu olacağı anlamına gelir. 🚀

* **Fast to code**: Increase the speed to develop features by about 200% to 300%. *
* **Fewer bugs**: Reduce about 40% of human (developer) induced errors. *
* **Intuitive**: Great editor support. <dfn title="also known as auto-complete, autocompletion, IntelliSense">Completion</dfn> everywhere. Less time debugging.

                    corresponding JSON. But if the data in the object returned is not
                    valid, that would mean a violation of the contract with the client,
                    so it's an error from the API developer. So, FastAPI will raise an
                    error and return a 500 error code (Internal Server Error).

                Read more about it in the

### El abbr da una frase completa y una explicación { #the-abbr-gives-a-full-phrase-and-an-explanation }

* <abbr title="Mozilla Developer Network - Red de Desarrolladores de Mozilla: documentación para desarrolladores, escrita por la gente de Firefox">MDN</abbr>
* <abbr title="Input/Output - Entrada/Salida: lectura o escritura de disco, comunicaciones de red.">I/O</abbr>.

### L’abbr donne une expression complète et une explication { #the-abbr-gives-a-full-phrase-and-an-explanation }

* <abbr title="Mozilla Developer Network - Réseau des développeurs Mozilla: documentation pour les développeurs, écrite par l’équipe Firefox">MDN</abbr>
* <abbr title="Input/Output - Entrée/Sortie: lecture ou écriture sur le disque, communications réseau.">I/O</abbr>.

Minimum eforla bir API'ı **oluşturma**, **deploy etme** ve **erişme** sürecini sadeleştirir.

FastAPI ile uygulama geliştirirken yaşadığınız aynı **developer experience**'ı, onları buluta **deploy etme** aşamasına da taşır. 🎉

FastAPI Cloud, *FastAPI and friends* açık kaynak projelerinin birincil sponsoru ve finansman sağlayıcısıdır. ✨

// Package gorm is a full-featured, developer-friendly ORM for Golang.
// See https://gorm.io for documentation and community.
package gorm

import (
	"context"
	"database/sql"
	"fmt"
	"reflect"
	"sort"
	"sync"
	"time"

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

// for Config.cacheStore store PreparedStmtDB key
const preparedStmtDBKey = "preparedStmt"

// Config GORM config