...✋️ 😣 👂 🔛 👀 ❔ ❎ 👈.

## 📨 🆎 & 💽 🖥

➡️ 😣 ⚪️➡️ ⏮️ 🖼. 👥 💚 **✍ 🔢 ⏮️ 1️⃣ 🆎** ✋️ 📨 🕳 👈 🔌 **🌅 💽**.

👥 💚 FastAPI 🚧 **🖥** 📊 ⚙️ 📨 🏷.

⏮️ 🖼, ↩️ 🎓 🎏, 👥 ✔️ ⚙️ `response_model` 🔢. ✋️ 👈 ⛓ 👈 👥 🚫 🤚 🐕‍🦺 ⚪️➡️ 👨‍🎨 & 🧰 ✅ 🔢 📨 🆎.

✋️ 🌅 💼 🌐❔ 👥 💪 🕳 💖 👉, 👥 💚 🏷 **⛽/❎** 📊 👉 🖼.

& 👈 💼, 👥 💪 ⚙️ 🎓 & 🧬 ✊ 📈 🔢 **🆎 ✍** 🤚 👍 🐕‍🦺 👨‍🎨 & 🧰, & 🤚 FastAPI **💽 🖥**.

...👐 👉 🖼 👥 🕴 🏗 & 👂.

### ✍ 💽

🗄 `Session` ⚪️➡️ `sqlalchemy.orm`, 👉 🔜 ✔ 👆 📣 🆎 `db` 🔢 & ✔️ 👻 🆎 ✅ & 🛠️ 👆 🔢.

🗄 `models` (🇸🇲 🏷) & `schemas` (Pydantic *🏷* / 🔗).

✍ 🚙 🔢:

* ✍ 👁 👩‍💻 🆔 & 📧.
* ✍ 💗 👩‍💻.
* ✍ 💗 🏬.

```Python hl_lines="1  3  6-7  10-11  14-15  27-28"
{!../../../docs_src/sql_databases/sql_app/crud.py!}
```

			`{{.}}`,
			[]string{
				`<b> "foo%" O'Reilly &bar;`,
				`a[href =~ "//example.com"]#foo`,
				// Not escaped.
				`Hello, <b>World</b> &amp;tc!`,
				` dir=&#34;ltr&#34;`,
				`c &amp;&amp; alert(&#34;Hello, World!&#34;);`,
				`Hello, World &amp; O&#39;Reilly\u0021`,
				`greeting=H%69,&amp;addressee=(World)`,
				`greeting=H%69,&amp;addressee=(World) 2x, https://golang.org/favicon.ico 500.5w`,
				`,foo/,`,

👆 💪 ✔️ 🔄 🍔 🖼, 🥇 🏠 🧖‍♂, ⤴️ 👨‍🍳, ✋️ 👆 🚫 ⌛ 👶 🕳, 🧹 & 🧹, 🔄 🚫🔜 📉 🕳.

⚫️ 🔜 ✊ 🎏 💸 🕰 🏁 ⏮️ ⚖️ 🍵 🔄 (🛠️) & 👆 🔜 ✔️ ⌛ 🎏 💸 👷.

✋️ 👉 💼, 🚥 👆 💪 ✊️ 8️⃣ 👰-🏧/🍳/🔜-🧹, & 🔠 1️⃣ 👫 (➕ 👆) 💪 ✊ 🏒 🏠 🧹 ⚫️, 👆 💪 🌐 👷 **🔗**, ⏮️ ➕ ℹ, & 🏁 🌅 🔜.

👉 😐, 🔠 1️⃣ 🧹 (🔌 👆) 🔜 🕹, 🤸 👫 🍕 👨‍🏭.

&amp; 🏆 🛠️ 🕰 ✊ ☑ 👷 (↩️ ⌛), &amp; 👷 💻 ⌛ <abbr title="Central Processing Unit">💽</abbr>, 👫 🤙 👫 ⚠ "💽 🎁".

# ⚒ & 🌐 🔢

📚 💼 👆 🈸 💪 💪 🔢 ⚒ ⚖️ 📳, 🖼 ㊙ 🔑, 💽 🎓, 🎓 📧 🐕‍🦺, ♒️.

🏆 👫 ⚒ 🔢 (💪 🔀), 💖 💽 📛. & 📚 💪 🚿, 💖 ㊙.

👉 🤔 ⚫️ ⚠ 🚚 👫 🌐 🔢 👈 ✍ 🈸.

## 🌐 🔢

!!! tip
    🚥 👆 ⏪ 💭 ⚫️❔ "🌐 🔢" & ❔ ⚙️ 👫, 💭 🆓 🚶 ⏭ 📄 🔛.

<a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">🌐 🔢</a> (💭 "🇨🇻 {") 🔢 👈 🖖 🏞 🐍 📟, 🏃‍♂ ⚙️, &amp; 💪 ✍ 👆 🐍 📟 (⚖️ 🎏 📋 👍).

⤴️, 📨 ⏭ 📑, 👆 📱 🔜 ⌛ 🕐 🥈 🌘, & 🔛.

👉 ⛓ 👈 ⚫️ 🔜 🔚 🆙 🏁 🏁 📑' 📨 ⏪ 🌘 ⏮️ 🕐.

⤴️ 1️⃣ 🏁 📨 👈 ⌛ 🌘 🥈 🔜 🔄 📂 💽 🔗, ✋️ 1️⃣ 📚 ⏮️ 📨 🎏 📑 🔜 🎲 🍵 🎏 🧵 🥇 🕐, ⚫️ 🔜 ✔️ 🎏 💽 🔗 👈 ⏪ 📂, & 🏒 🔜 🚮 ❌ & 👆 🔜 👀 ⚫️ 📶, & 📨 🔜 ✔️ `Internal Server Error`.

👉 🔜 🎲 🔨 🌅 🌘 1️⃣ 📚 📑.

🚥 👆 ✔️ 💗 👩‍💻 💬 👆 📱 ⚫️❔ 🎏 🕰, 👉 ⚫️❔ 💪 🔨.

{!../../../docs_src/security/tutorial005.py!}
```

## ✔ `username` & 💽 💠

👥 ✔ 👈 👥 🤚 `username`, & ⚗ ↔.

& ⤴️ 👥 ✔ 👈 📊 ⏮️ Pydantic 🏷 (✊ `ValidationError` ⚠), & 🚥 👥 🤚 ❌ 👂 🥙 🤝 ⚖️ ⚖ 📊 ⏮️ Pydantic, 👥 🤚 `HTTPException` 👥 ✍ ⏭.

👈, 👥 ℹ Pydantic 🏷 `TokenData` ⏮️ 🆕 🏠 `scopes`.

⚖ 📊 ⏮️ Pydantic 👥 💪 ⚒ 💭 👈 👥 ✔️, 🖼, ⚫️❔ `list` `str` ⏮️ ↔ & `str` ⏮️ `username`.

🔅 "**📦 🖼**" 👈 🏪 🎻 🎚,"**📦**" 🛎 🔗 🏃‍♂ 👐, 👜 👈 ➖ **🛠️**.

🕐❔ **📦** ▶️ & 🏃‍♂ (▶️ ⚪️➡️ **📦 🖼**) ⚫️ 💪 ✍ ⚖️ 🔀 📁, 🌐 🔢, ♒️. 👈 🔀 🔜 🔀 🕴 👈 📦, ✋️ 🔜 🚫 😣 👽 📦 🖼 (🔜 🚫 🖊 💾).

📦 🖼 ⭐ **📋** 📁 & 🎚, ✅ `python` & 📁 `main.py`.

                                                    <td><la:link
                                                            href="/admin/searchlog/search?logType=search&amp;queryId=${f:u(info.value)}&amp;userSessionId=&amp;requestedTimeRange=&amp;accessType=">${f:h(info.value)}</la:link></td>
                                                </c:when>
                                                <c:when test="${info.key == 'User Info ID'}">

```Python hl_lines="30-31" title="app/routers/items.py"
{!../../../docs_src/bigger_applications/app/routers/items.py!}
```

!!! tip
    👉 🏁 ➡ 🛠️ 🔜 ✔️ 🌀 🔖: `["items", "custom"]`.

     & ⚫️ 🔜 ✔️ 👯‍♂️ 📨 🧾, 1️⃣ `404` & 1️⃣ `403`.

## 👑 `FastAPI`

🔜, ➡️ 👀 🕹 `app/main.py`.

📥 🌐❔ 👆 🗄 & ⚙️ 🎓 `FastAPI`.