例如，为了扩展先前的模型，你可能决定除了 `item` 和 `user` 之外，还想在同一请求体中具有另一个键 `importance`。

如果你就按原样声明它，因为它是一个单一值，**FastAPI** 将假定它是一个查询参数。

但是你可以使用 `Body` 指示 **FastAPI** 将其作为请求体的另一个键进行处理。


{* ../../docs_src/body_multiple_params/tutorial003_an_py310.py hl[23] *}

在这种情况下，**FastAPI** 将期望像这样的请求体：


```JSON
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    },
    "user": {

    assertThrows(IllegalArgumentException.class, () -> range.gap(Range.closed(2, 4)));
    assertThrows(IllegalArgumentException.class, () -> range.gap(Range.closed(2, 3)));
  }

  public void testGap_invalidRangesWithInfinity() {
    assertThrows(IllegalArgumentException.class, () -> Range.atLeast(1).gap(Range.atLeast(2)));

TEST(CAPI, Tensor) {
  const int num_bytes = 6 * sizeof(float);
  float* values =
      reinterpret_cast<float*>(tensorflow::cpu_allocator()->AllocateRaw(
          TF_TensorDefaultAlignment(), num_bytes));
  int64_t dims[] = {2, 3};
  bool deallocator_called = false;
  TF_Tensor* t = TF_NewTensor(TF_FLOAT, dims, 2, values, num_bytes,
                              &Deallocator, &deallocator_called);
  EXPECT_FALSE(deallocator_called);

	JMP -1(PC)                                 // ffffff17
	BFIW $16, R20, $6, R0                      // 80161033
	BFI $27, R21, $21, R25                     // b95265b3
	BFXILW $3, R27, $23, R14                   // 6e670333
	BFXIL $26, R8, $16, R20                    // 14a55ab3
	BICW R7@>15, R5, R16                       // b03ce70a
	BIC R12@>13, R12, R19                      // 9335ec8a

	_ = x[ErrInvalidEncodingMethod-18]
	_ = x[ErrInvalidMaxUploads-19]
	_ = x[ErrInvalidMaxParts-20]
	_ = x[ErrInvalidPartNumberMarker-21]
	_ = x[ErrInvalidPartNumber-22]
	_ = x[ErrInvalidRequestBody-23]
	_ = x[ErrInvalidCopySource-24]
	_ = x[ErrInvalidMetadataDirective-25]
	_ = x[ErrInvalidCopyDest-26]
	_ = x[ErrInvalidPolicyDocument-27]
	_ = x[ErrInvalidObjectState-28]
	_ = x[ErrMalformedXML-29]

		22: {
			IsTruncated: false,
			Objects: []ObjectInfo{
				{Name: "newPrefix1"},
				{Name: "newzen/zen/recurse/again/again/again/pics"},
			},
		},
		// ListObjectsResult-23.
		// Prefix is set to "Asia/India/" in the testCase, and delimiter is not set (testCase 55).
		23: {
			IsTruncated: false,
			Objects: []ObjectInfo{
				{Name: "Asia/India/India-summer-photos-1"},

				},
				{
					Object:   objectNames[0],
					UploadID: uploadIDs[2],
				},
				{
					Object:   objectNames[0],
					UploadID: uploadIDs[3],
				},
			},
		},
		// listMultipartResults - 23.
		// Testing for listing of 3 uploadID's for a given object
		// setting `prefix` to be "orange".
		// Will be used to list on bucketNames[1].
		{
			MaxUploads:  10,
			IsTruncated: false,

pkg debug/elf, const R_390_PC16DBL R_390
pkg debug/elf, const R_390_PC32 = 5
pkg debug/elf, const R_390_PC32 R_390
pkg debug/elf, const R_390_PC32DBL = 19
pkg debug/elf, const R_390_PC32DBL R_390
pkg debug/elf, const R_390_PC64 = 23
pkg debug/elf, const R_390_PC64 R_390
pkg debug/elf, const R_390_PLT16DBL = 18
pkg debug/elf, const R_390_PLT16DBL R_390
pkg debug/elf, const R_390_PLT32 = 8
pkg debug/elf, const R_390_PLT32 R_390

        cal.set(Calendar.HOUR, 11);
        cal.set(Calendar.AM_PM, Calendar.PM);

        // just to make sure all the bases are covered...
        cal.set(Calendar.HOUR_OF_DAY, 23);

        Date secondTestDate = cal.getTime();

        SimpleDateFormat format = new SimpleDateFormat(MavenBuildTimestamp.DEFAULT_BUILD_TIMESTAMP_FORMAT);

単数値なのでそのまま宣言すると、**FastAPI** はそれがクエリパラメータであるとみなします。

しかし、`Body`を使用して、**FastAPI** に別のボディキーとして扱うように指示することができます:


{* ../../docs_src/body_multiple_params/tutorial003.py hl[23] *}

この場合、**FastAPI** は以下のようなボディを期待します:


```JSON
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    },
    "user": {