# Query Parameter Models

If you have a group of **query parameters** that are related, you can create a **Pydantic model** to declare them.

This would allow you to **re-use the model** in **multiple places** and also to declare validations and metadata for all the parameters at once. 😎

/// note

This is supported since FastAPI version `0.115.0`. 🤓

///

## Query Parameters with a Pydantic Model

	messages := diag.Messages{}

	zipkinSvc := &corev1.Service{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "zipkin",
			Namespace: "istio-system",
		},
	}
	cli.Kube().CoreV1().Services("istio-system").Create(context.Background(), zipkinSvc, metav1.CreateOptions{})

	err := checkTracing(cli, &messages)
	assert.NoError(t, err)
	assert.Equal(t, 1, len(messages))

		Name1 string
		Name2 string
		Name3 string
	}

	DB.Migrator().DropTable(&NamedUser{})
	DB.AutoMigrate(&NamedUser{})

	namedUser := NamedUser{Name1: "jinzhu1", Name2: "jinzhu2", Name3: "jinzhu3"}
	DB.Create(&namedUser)

	var result NamedUser
	DB.First(&result, "name1 = @name OR name2 = @name OR name3 = @name", sql.Named("name", "jinzhu2"))

	AssertEqual(t, result, namedUser)

	var result2 NamedUser

    }

    @Override
    public LaJobRunner createRunner() {
        return new LaJobRunner().useAccessContext(
                resource -> accessContextLogic.create(resource, OptionalThing::empty, OptionalThing::empty, () -> APP_TYPE));
    }

    public void setJobClass(final Class<? extends LaJob> jobClass) {
        this.jobClass = jobClass;
    }

  @CollectionSize.Require(absent = ZERO)
  public void testAdd_supportedNullPresent() {
    E[] array = createArrayWithNullElement();
    collection = getSubjectGenerator().create(array);
    assertTrue("add(nullPresent) should return true", getList().add(null));

    List<E> expected = copyToList(array);
    expected.add(null);
    expectContents(expected);
  }

  /**

            builder.accept(factory);
            return factory.newXPath();
        } catch (final Exception e) {
            throw new CrawlerSystemException("Failed to create XPath instance.", e);
        }
    }

    /**
     *  Use an XPath string to select a nodelist.
     *  XPath namespace prefixes are resolved from the contextNode.
     *

				}
				got := buf.Bytes()
				if !bytes.Equal(want, got) {
					t.Fatalf("incorrect result: (-got +want)\n%v", bytediff(got, want))
				}
			}
		})
	}
}

func TestPax(t *testing.T) {
	// Create an archive with a large name
	fileinfo, err := os.Stat("testdata/small.txt")
	if err != nil {
		t.Fatal(err)
	}
	hdr, err := FileInfoHeader(fileinfo, "")
	if err != nil {
		t.Fatalf("os.Stat: %v", err)
	}

  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 1;

  // An object that describes the pod that will be created.
  // The DaemonSet will create exactly one copy of this pod on every node
  // that matches the template's node selector (or on every node if no node
  // selector is specified).
  // The only allowed template.spec.restartPolicy value is "Always".

### Virtual environment

Follow the instructions to create and activate a [virtual environment](virtual-environments.md){.internal-link target=_blank} for the internal code of `fastapi`.

### Install requirements using pip

After activating the environment, install the required packages:

  if [[ -n "${KUBERNETES_CNI:-}" ]]; then
    unset KIND_WAIT_FLAG
    KIND_DISABLE_CNI="true"
  fi

  # Create KinD cluster
  if ! (yq eval "${CONFIG}" --expression ".networking.disableDefaultCNI = ${KIND_DISABLE_CNI}" \
    --expression ".networking.ipFamily = \"${IP_FAMILY}\"" | \
    kind create cluster --name="${NAME}" -v4 --retain --image "${IMAGE}" ${KIND_WAIT_FLAG:+"$KIND_WAIT_FLAG"} --config -); then