But you still want to be able to filter and convert the data you return with a `response_model`.

For those cases, you can use a `Response` parameter.

## Use a `Response` parameter { #use-a-response-parameter }

You can declare a parameter of type `Response` in your *path operation function* (as you can do for cookies and headers).

And then you can set the `status_code` in that *temporal* response object.

        // Verify - should return empty when parameter name is blank
        assertFalse(result.isPresent());
    }

    // Test findBusinessLocale with null parameter name
    @Test
    public void test_findBusinessLocale_withNullParameterName() {
        // Setup mock config with null parameter name
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            @Override

    }

    private Stream<String> getParameterNames(Parameter parameter) {
        if (parameter.getAlias() != null) {
            return Stream.of(parameter.getName(), parameter.getAlias());
        } else {
            return Stream.of(parameter.getName());
        }
    }

    private Set<String> getUnknownParameters(MojoExecution mojoExecution, Set<String> parameters) {

     * Even if empty string, treated as empty plainly. So "IF pmb != null" is false if empty.
     * @param clustername The parameter value of clustername. (NotNull)
     */
    public void setClustername(String clustername) {
        registerVariable("clustername", clustername);
    }

    /**
     * Set the value of clusterstatus, used in parameter comment. <br>

{* ../../docs_src/body/tutorial002_py310.py *}

## Request body + path parameters { #request-body-path-parameters }

You can declare path parameters and request body at the same time.

**FastAPI** will recognize that the function parameters that match path parameters should be **taken from the path**, and that function parameters that are declared to be Pydantic models should be **taken from the request body**.

    private int currentPageNumber;

    /** Search parameter: elevate word ID */
    public String id;

    /** Search parameter: suggest word */
    public String suggestWord;

    /** Search parameter: boost value */
    public String boost;

    /** Search parameter: created by user */
    public String createdBy;

    /** Search parameter: creation time */
    public String createdTime;

      <configurator>antrun</configurator>
      <parameters>
        <parameter>
          <name>finalName</name>
          <alias>jarName</alias>
          <type>java.lang.String</type>
          <implementation>java.lang.String</implementation>
          <required>false</required>
          <editable>true</editable>
          <description>parameter-description</description>

    /** Total number of parameter bytes the server is returning */
    protected int totalParameterCount;
    /** Total number of data bytes the server is returning */
    protected int totalDataCount;
    /** Number of parameter bytes in this response */
    protected int parameterCount;
    /** Offset from the start of the SMB header to the parameter bytes */
    protected int parameterOffset;

You can use the `response_model` parameter in any of the *path operations*:

* `@app.get()`
* `@app.post()`
* `@app.put()`
* `@app.delete()`
* etc.

{* ../../docs_src/response_model/tutorial001_py310.py hl[17,22,24:27] *}

/// note

    private int currentPageNumber;

    /** Search/filter parameter for duplicate host configuration ID. */
    public String id;

    /** Search/filter parameter for regular hostname pattern. */
    public String regularName;

    /** Search/filter parameter for duplicate hostname pattern. */
    public String duplicateHostName;

    /** Search/filter parameter for duplicate host sort order. */
    public String sortOrder;