You can create production applications with **FastAPI** right now (and you have probably been doing it for some time), you just have to make sure that you use a version that works correctly with the rest of your code.

## Pin your `fastapi` version { #pin-your-fastapi-version }

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

Django REST Frameworkは、Djangoを下敷きにしてWeb APIを構築する柔軟なツールキットとして、APIの機能を向上させるために作られました。

Mozilla、Red Hat、Eventbrite など多くの企業で利用されています。

これは**自動的なAPIドキュメント生成**の最初の例であり、これは**FastAPI**に向けた「調査」を触発した最初のアイデアの一つでした。

/// note | 備考

  # $TF_VER_FULL will resolve to e.g. "2.15.0-rc2". Since $TF_VER_FULL comes
  # from get_versions.sh, which must be run *after* update_version.py, FINAL_URI
  # can't be set inside the rest of the _upload envs.
  FINAL_URI="$TFCI_ARTIFACT_FINAL_GCS_URI/$TF_VER_FULL"
  gsutil -m rsync -d -r "$DOWNLOADS" "$FINAL_URI"

  # Also mirror the latest-uploaded folder to the "latest" directory.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Secure credential storage with encryption at rest.
 *
 * Provides secure storage of passwords and other sensitive credentials
 * using AES-GCM encryption with PBKDF2 key derivation.
 *
 * Features:
 * - Encrypts credentials at rest using AES-256-GCM
 * - Uses PBKDF2 for key derivation from master password
 * - Secure wiping of sensitive data

* <a href="https://alternativeto.net/software/fastapi/" class="external-link" target="_blank">AlternativeToで **FastAPI** に投票</a>
* <a href="https://github.com/marmelab/awesome-rest/pull/93" class="external-link" target="_blank">awesome-restで **FastAPI** に投票</a>

## GitHub issuesで他の人を助ける

        Smb2TreeDisconnectRequest req1 = new Smb2TreeDisconnectRequest(mockConfig);
        Smb2TreeDisconnectRequest req2 = new Smb2TreeDisconnectRequest(mockConfig);

        // Then - all should have same command
        int cmd1 = (int) commandField.get(req1);
        int cmd2 = (int) commandField.get(req2);

        assertEquals(cmd1, cmd2);
        assertEquals(SMB2_TREE_DISCONNECT, cmd1);
    }

    @Test

<manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
          package="okhttp.okhttp3">

  <uses-permission android:name="android.permission.INTERNET"/>

  <application>
    <provider
      android:name="androidx.startup.InitializationProvider"
      android:authorities="${applicationId}.androidx-startup"
      android:exported="false"
      tools:node="merge">

        // Write first FileBothDirectoryInfo at bufferIndex=8
        SMBUtil.writeInt4(104, buffer, 8); // NextEntryOffset to second entry
        SMBUtil.writeInt4(0, buffer, 12); // FileIndex
        // ... rest of first entry fields (zeros for simplicity)
        for (int i = 16; i < 102; i++) {
            buffer[i] = 0;
        }
        SMBUtil.writeInt4(8, buffer, 68); // FileNameLength at offset 60 from start

First, you have to import it:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[4] *}


/// warning

Notice that `Field` is imported directly from `pydantic`, not from `fastapi` as are all the rest (`Query`, `Path`, `Body`, etc).

///

## Declare model attributes { #declare-model-attributes }

You can then use `Field` with model attributes:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[11:14] *}

   * received without TLS.
   */
  public val handshake: Handshake?,
  /**
   * Returns the name of the server the client requested via the SNI (Server Name Indication)
   * attribute in the TLS handshake. Unlike the rest of the HTTP exchange, this name is sent in
   * cleartext and may be monitored or blocked by a proxy or other middlebox.
   */
  public val handshakeServerNames: List<String>,
  /** A string like `GET` or `POST`. */