It will perform the validation of the compound data, and will document it like that for the OpenAPI schema and automatic docs.

## Singular values in body { #singular-values-in-body }

The same way there is a `Query` and `Path` to define extra data for query and path parameters, **FastAPI** provides an equivalent `Body`.

            "The system cannot find the file specified.", "The system cannot find the file specified.", "End of file",
            "More data is available.", "Access is denied.", "The data area passed to a system call is too small.",
            "The filename, directory name, or volume label syntax is incorrect.", "The system cannot find the file specified.",

| IMPORTANT |
| -------------------------- |

		if eventData.EventName == event.ObjectRemovedDelete {
			_, err = target.deleteStmt.Exec(key)
		} else {
			var data []byte
			if data, err = json.Marshal(struct{ Records []event.Event }{[]event.Event{eventData}}); err != nil {
				return err
			}

			_, err = target.updateStmt.Exec(key, data)
		}
		return err
	}

	if target.args.Format == event.AccessFormat {

You declare the "shape" of the data as classes with attributes.

And each attribute has a type.

Then you create an instance of that class with some values and it will validate the values, convert them to the appropriate type (if that's the case) and give you an object with all the data.

And you get all the editor support with that resulting object.

package cmd

import (
	"context"
	"fmt"
	"io"
)

// Writes to multiple writers
type multiWriter struct {
	writers     []io.Writer
	writeQuorum int
	errs        []error
}

// Write writes data to writers.
func (p *multiWriter) Write(ctx context.Context, blocks [][]byte) error {
	for i := range p.writers {
		if p.errs[i] != nil {
			continue
		}
		if p.writers[i] == nil {
			p.errs[i] = errDiskNotFound

        result = netShareEnum.writeSetupWireFormat(dst, 50);
        assertEquals(0, result);

        // Verify no data was written
        assertArrayEquals(new byte[100], dst);
    }

    @Test
    @DisplayName("Test writeParametersWireFormat writes correct data")
    void testWriteParametersWireFormat() throws Exception {
        netShareEnum = new NetShareEnum(realConfig);

import java.net.http.HttpClient
import java.net.http.HttpRequest
import java.net.http.HttpResponse


data class GitHubPullRequestSearchResult(val items: List<GitHubPullRequest>)


data class GitHubUser(val login: String, val name: String?)


data class GitHubPullRequestMilestone(val title: String)


data class GitHubPullRequest(
    val number: Int,
    val user: GitHubUser,

 */
package org.codelibs.fess.crawler.service;

import java.util.List;

import org.codelibs.fess.crawler.entity.AccessResult;
import org.codelibs.fess.crawler.util.AccessResultCallback;

/**
 * Interface for data service operations related to access results.
 *
 * @param <RESULT> the type of access result
 */
public interface DataService<RESULT extends AccessResult<?>> {

    /**
     * Stores the given access result.

Declare the **query parameters** that you need in a **Pydantic model**, and then declare the parameter as `Query`:

{* ../../docs_src/query_param_models/tutorial001_an_py310.py hl[9:13,17] *}

**FastAPI** will **extract** the data for **each field** from the **query parameters** in the request and give you the Pydantic model you defined.

## Check the Docs { #check-the-docs }

You can see the query parameters in the docs UI at `/docs`: