### Додайте `APIRouter` для `users` і `items` { #include-the-apirouters-for-users-and-items }

Тепер додаймо `router` з підмодулів `users` і `items`:

{* ../../docs_src/bigger_applications/app_an_py310/main.py hl[10:11] title["app/main.py"] *}

/// info | Інформація

`users.router` містить `APIRouter` у файлі `app/routers/users.py`.

А `items.router` містить `APIRouter` у файлі `app/routers/items.py`.

///

        scheduler.scheduleAtFixedRate(this::checkHeartbeats, 30, 30, TimeUnit.SECONDS);
        
        // Registration monitoring
        scheduler.scheduleAtFixedRate(this::monitorRegistrations, 10, 10, TimeUnit.SECONDS);
    }
    
    public CompletableFuture<WitnessRegistration> registerForNotifications(
            String shareName, 
            InetAddress serverAddress,

        fileBuilder.append(".tmp")
        dirtyFiles += directory / fileBuilder.toString()
        fileBuilder.setLength(truncateTo)
      }
    }

    /** Set lengths using decimal numbers like "10123". */
    @Throws(IOException::class)
    internal fun setLengths(strings: List<String>) {
      if (strings.size != valueCount) {
        invalidLengths(strings)
      }

      try {

            assertEquals(0x02, SMBUtil.readInt2(buffer, 6));
            assertEquals(0x03, SMBUtil.readInt2(buffer, 8));
            assertArrayEquals(salt, Arrays.copyOfRange(buffer, 10, 12));
        }

        @Test
        @DisplayName("Should encode null hash algorithms and salt")
        void testEncodeNullHashAlgosAndSalt() {

        final ChatMessage msg = createAssistantWithSources("Hello world, this is some content.", "Doc");
        final String result = chatClient.testBuildAssistantHistoryContent(msg, "smart_summary", 10, 10);
        // Should not crash; maxSuffixLen=10/4=2, suffix gets truncated severely
        // bodyBudget may be 0 or negative => suffix or truncated content returned
        assertNotNull(result);

        assertEquals(0, qrList.getStart());
        assertEquals(10, qrList.getPageSize());
        assertEquals(0, qrList.getOffset());

        // Page info should be calculated (allRecordCount=100, pageSize=10 => 10 pages)
        // But since size() < pageSize, collapsing logic applies and allPageCount becomes currentPageNumber
        assertEquals(1, qrList.getAllPageCount()); // Collapsed to current page due to size() = 1 < pageSize = 10

不過在大多數需要這樣做的情況下，我們只是想要像這個例子一樣，讓模型過濾/移除部分資料。

在這些情況下，我們可以利用類別與繼承，搭配函式的型別註解，取得更好的編輯器與工具支援，同時仍能讓 FastAPI 做資料過濾。

{* ../../docs_src/response_model/tutorial003_01_py310.py hl[7:10,13:14,18] *}

這樣我們能得到工具支援，對於編輯器與 mypy 來說，這段程式碼在型別上是正確的，同時我們也能得到 FastAPI 的資料過濾。

這是怎麼運作的？來看一下。🤓

### 型別註解與工具支援 { #type-annotations-and-tooling }

先看看編輯器、mypy 與其他工具會怎麼看這件事。

pkg testing, func MainStart(testDeps, []InternalTest, []InternalBenchmark, []InternalExample) *M
pkg testing, func RegisterCover(Cover)
pkg text/scanner, const GoTokens = 1012
pkg text/template/parse, type DotNode bool
pkg text/template/parse, type Node interface { Copy, String, Type }
pkg unicode, const Version = "10.0.0"
pkg unicode, const Version = "11.0.0"

		if ok1 || ok2 {
			return ok1 && ok2
		}
		return x == y
	}
	for _, v := range vectors {
		t.Run(strings.TrimSuffix(path.Base(v.file), ".base64"), func(t *testing.T) {
			const maxSize = 10 << 10 // 10KiB
			buf := new(bytes.Buffer)
			tw := NewWriter(iotest.TruncateWriter(buf, maxSize))

			for i, tf := range v.tests {
				switch tf := tf.(type) {
				case testHeader:

removed in v2.<br />\n   * Additionally, it accepts additions and subtractions between different units.\n   * Note that multiplications and divisions aren't supported.\n   *\n   * Valid examples are:\n   * ```\n   * 10\n   * '10%'\n   * '10, 10'\n   * '10%, 10'\n   * '10 + 10%'\n   * '10 - 5vh + 3%'\n   * '-10px + 5vh, 5px - 6%'\n   * ```\n   * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap\n   * > with their reference element, unfortunately, you will have to...