!!! tip
    You could adopt ideas from the section about SQLAlchemy ORM ([SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank}), like using utility functions to perform operations in the database, independent of your **FastAPI** code.

(lo que estas leyendo ahora mismo).

La guía esa diseñada para que puedas crear una aplicación completa con solo el **Tutorial - Guía de Usuario**, y luego extenderlo de diferentes maneras, según tus necesidades, utilizando algunas de las ideas adicionales de la **Guía Avanzada de Usuario**....

User Guide** (what you are reading right now).

It's designed so that you can build a complete application with just the **Tutorial - User Guide**, and then extend it in different ways, depending on your needs, using some of the additional ideas from the **Advanced User Guide**....

need to have a model with all the attributes marked as optional (with default values or `None`).

    To distinguish from the models with all optional values for **updates** and models with required values for **creation**, you can use the ideas described in [Extra Models](extra-models.md){.internal-link target=_blank}....

## Recap

You can use **Gunicorn** (or also Uvicorn) as a process manager with Uvicorn workers to take advantage of **multi-core CPUs**, to run **multiple processes in parallel**.

You could use these tools and ideas if you are setting up **your own deployment system** while taking care of the other deployment concepts yourself.

!!! warning
    The supporting additional functions are just to demo a possible flow of the data, but they of course are not providing any real security.

## Reduce duplication

Reducing code duplication is one of the core ideas in **FastAPI**.

As code duplication increments the chances of bugs, security issues, code desynchronization issues (when you update in one place but not in the others), etc.

    />

    <projectService
        serviceInterface="org.jetbrains.kotlin.idea.references.KotlinReferenceProviderContributor"
        serviceImplementation="org.jetbrains.kotlin.idea.references.KotlinFirReferenceContributor"
    />

    <projectService
        serviceInterface="org.jetbrains.kotlin.idea.references.ReadWriteAccessChecker"

import org.jetbrains.kotlin.analysis.api.fir.symbols.KtFirSyntheticJavaPropertySymbol
import org.jetbrains.kotlin.analysis.api.symbols.KtSymbol
import org.jetbrains.kotlin.idea.references.KDocReference
import org.jetbrains.kotlin.idea.references.KtFirReference
import org.jetbrains.kotlin.idea.references.getPsiDeclarations
import org.jetbrains.kotlin.kdoc.psi.impl.KDocName

        api("com.gradle:develocity-gradle-plugin:3.17.2") // Sync with `settings.gradle.kts`
        api("com.gradle.publish:plugin-publish-plugin:1.2.1")
        api("gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext:1.0.1")
        api("me.champeau.gradle:japicmp-gradle-plugin:0.4.1")
        api("me.champeau.jmh:jmh-gradle-plugin:0.7.2")
        api("org.asciidoctor:asciidoctor-gradle-jvm:4.0.2")

Usuário** (que você está lendo agora).

Ele foi projetado para que você possa construir uma aplicação completa com apenas o **Tutorial - Guia de Usuário**, e então estendê-la de diferentes formas, dependendo das suas necessidades, usando algumas ideias adicionais do **Guia Avançado de Usuário**....