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`:

    }

    /**
     * Extracts a subset of documents from the full result list based on pagination parameters.
     * Applies proper bounds checking to ensure the extracted range is within the document list size.
     *
     * @param docs the full list of search result documents

 * limitations under the License.
 */
package gradlebuild.docs.dsl.source.model;

import org.gradle.api.Action;

import java.io.Serializable;

/**
 * Static meta-data about a property extracted from the source for the class.
 */
public class PropertyMetaData extends AbstractLanguageElement implements Serializable, TypeContainer {
    private TypeMetaData type;
    private final String name;

#!/usr/bin/env bash

echo "script failed" >resiliency-verify-healing.log # assume initial state

# Extract arguments from json object ...
FILE=$(echo $1 | jq -r '.args.file')
DIR=$(echo $1 | jq -r '.args.dir')
DEEP=$(echo $1 | jq -r '.args.deep')
WANT=$(echo $1 | jq 'del(.args)') # ... and remove args from wanted result

ALIAS_NAME=myminio
BUCKET="test-bucket"

        assertNotNull(projectId, "Project ID should not be null");
        assertEquals(
                "com.example:test-project:jar:1.0.0",
                projectId,
                "Should extract project ID from rawModel when effectiveModel is null");
    }

    /**
     * Test extractProjectId with fileModel fallback when both effectiveModel and rawModel are null.
     */
    @Test

            """
        ),
    ] = _Unset,
    alias: Annotated[
        Optional[str],
        Doc(
            """
            An alternative name for the parameter field.

            This will be used to extract the data and for the generated OpenAPI.
            It is particularly useful when you can't use the name you want because it
            is a Python reserved keyword or similar.
            """
        ),
    ] = None,

// license that can be found in the LICENSE file.

TEXT errors(SB),$0
	MOVL	foo<>(SB)(AX), AX	// ERROR "invalid instruction"
	MOVL	(AX)(SP*1), AX		// ERROR "invalid instruction"
	EXTRACTPS $4, X2, (BX)          // ERROR "invalid instruction"
	EXTRACTPS $-1, X2, (BX)         // ERROR "invalid instruction"
	// VSIB addressing does not permit non-vector (X/Y)
	// scaled index register.
	VPGATHERDQ X12,(R13)(AX*2), X11 // ERROR "invalid instruction"

            if (StringUtil.isNotBlank(userCode)) {
                updateUserSessionId(userCode);
            }
            return userCode;
        }).orElse(null);
    }

    /**
     * Extracts the user code from the user bean stored in the session.
     * This method retrieves the authenticated user information and creates an encrypted user code.
     *
     * @param request the HTTP servlet request

                res.sendRedirect(locationBuf.toString());
                return;
            }
        }

        chain.doFilter(request, response);
    }

    /**
     * Extracts and parses parameters from the request query string.
     * Applies the specified character encoding to decode parameter values.
     *
     * @param request the HTTP request containing the query string

import org.gradle.api.Action;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/**
 * Static meta-data about a type reference extracted from source.
 */
public class TypeMetaData implements Serializable, TypeContainer {
    public static final TypeMetaData VOID = new TypeMetaData("void");