</la:info>
                                    <la:errors/>
                                </div>
                                    <%-- Form Fields --%>
                                <table class="table table-bordered">
                                    <tbody>
                                    <tr>

                "type": "value_error.missing",
                "loc": ["body", "username"],
                "msg": "field required",
            },
            {
                "type": "value_error.missing",
                "loc": ["body", "password"],
                "msg": "field required",
            },
        ]
    }


@needs_pydanticv1
def test_post_body_json(client: TestClient):

    Field[] fields = type.getDeclaredFields();
    Arrays.sort(fields, BY_FIELD_NAME);
    for (Field field : fields) {
      if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())
          && Modifier.isFinal(field.getModifiers())) {
        if (field.getGenericType() == field.getType() && type.isAssignableFrom(field.getType())) {

//msgp:tuple dataUsageEntryV2
type dataUsageEntryV2 struct {
	// These fields do no include any children.
	Size     int64
	Objects  uint64
	ObjSizes sizeHistogram
	Children dataUsageHashMap
}

//msgp:tuple dataUsageEntryV3
type dataUsageEntryV3 struct {
	// These fields do no include any children.
	Size     int64
	Objects  uint64
	ObjSizes sizeHistogram

		return explodeSeq(s)
	}
	return func(yield func([]byte) bool) {
		for {
			i := Index(s, sep)
			if i < 0 {
				break
			}
			frag := s[:i+sepSave]
			if !yield(frag[:len(frag):len(frag)]) {
				return
			}
			s = s[i+len(sep):]
		}
		yield(s[:len(s):len(s)])
	}
}

// SplitSeq returns an iterator over all substrings of s separated by sep.

        if (!labelTypeItems.isEmpty() && !form.fields.containsKey(FessSearchAction.LABEL_FIELD)) {
            final String[] defaultLabelValues = fessConfig.getDefaultLabelValues(getUserBean());
            if (defaultLabelValues.length > 0) {
                form.fields.put(FessSearchAction.LABEL_FIELD, defaultLabelValues);
            }
        }

    Field[] fields = type.getDeclaredFields();
    Arrays.sort(fields, BY_FIELD_NAME);
    for (Field field : fields) {
      if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())
          && Modifier.isFinal(field.getModifiers())) {
        if (field.getGenericType() == field.getType() && type.isAssignableFrom(field.getType())) {

                                    </la:info>
                                    <la:errors/>
                                </div>
                                    <%-- Form Fields --%>
                                <table class="table table-bordered">
                                    <tbody>
                                    <tr>

# Body - Nested Models

With **FastAPI**, you can define, validate, document, and use arbitrarily deeply nested models (thanks to Pydantic).

## List fields

You can define an attribute to be a subtype. For example, a Python `list`:

//// tab | Python 3.10+

```Python hl_lines="12"
{!> ../../docs_src/body_nested_models/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14"

	}
	return nil
}

type (
	stringFormatter func([]byte, string)
	numberFormatter func([]byte, int64)
)

// templateV7Plus fills out the V7 fields of a block using values from hdr.
// It also fills out fields (uname, gname, devmajor, devminor) that are
// shared in the USTAR, PAX, and GNU formats using the provided formatters.
//
// The block returned is only valid until the next call to