In that case, you can simply swap the standard `dataclasses` with `pydantic.dataclasses`, which is a drop-in replacement:

{* ../../docs_src/dataclasses_/tutorial003_py310.py hl[1,4,7:10,13:16,22:24,27] *}

1. We still import `field` from standard `dataclasses`.

2. `pydantic.dataclasses` is a drop-in replacement for `dataclasses`.

3. The `Author` dataclass includes a list of `Item` dataclasses.

...без додавання обов’язкового параметра `needy`, Ви побачите помилку:

```JSON
{
  "detail": [
    {
      "type": "missing",
      "loc": [
        "query",
        "needy"
      ],
      "msg": "Field required",
      "input": null
    }
  ]
}
```

Оскільки `needy` є обов’язковим параметром, вам потрібно вказати його в URL:

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

* kubectl get -o jsonpath=... will now throw an error if the path is to a field not present in the json, even if the path is for a field valid for the type.  This is a change from the pre-1.5 behavior, which would return the default value for some fields even if they were not present in the json. ([#37991](https://github.com/kubernetes/kubernetes/pull/37991), [@pwittrock](https://github.com/pwittrock))

        assertArrayEquals(key.getKey(), context.getLeaseKey().getKey());
        assertEquals(DirectoryLeaseState.DIRECTORY_READ_HANDLE, context.getLeaseState());

        // Directory-specific fields should retain defaults
        assertEquals(DirectoryCacheScope.IMMEDIATE_CHILDREN, context.getCacheScope());
        assertEquals(30000L, context.getMaxCacheAge());
        assertTrue(context.isNotificationEnabled());
    }

- AWS S3's [reserved keywords](https://docs.aws.amazon.com/AmazonS3/latest/dev/s3-glacier-select-sql-reference-keyword-list.html) list is not yet respected.

```JSON
{
  "detail": [
    {
      "type": "missing",
      "loc": [
        "query",
        "needy"
      ],
      "msg": "Field required",
      "input": null
    }
  ]
}
```

As `needy` is a required parameter, you would need to set it in the URL:

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

					return
				}
			case schema.Many2Many:
				var (
					queryConds     = make([]clause.Expression, 0, len(rel.References))
					foreignFields  = make([]*schema.Field, 0, len(rel.References))
					relForeignKeys = make([]string, 0, len(rel.References))
					modelValue     = reflect.New(rel.JoinTable.ModelType).Interface()
					table          = rel.JoinTable.Table

                // Force close the handle
                this.open = false;
                this.usageCount.set(0);

                // Clear mutable references to free memory
                // Note: Some fields may be final and cannot be nulled

                // Clear any other mutable state would go here
            }
        } catch (Exception e) {
            log.error("Failed to perform emergency file handle cleanup", e);

            m.ptype = 0;
            m.flags = flag;

            NdrBuffer buf = new NdrBuffer(new byte[1024], 0);
            m.encode(buf);

            // Reset and skip to flags field
            buf.setIndex(3);
            assertEquals(flag, buf.dec_ndr_small());
        }
    }

     * @return the standard lease context size
     */
    protected int getStandardLeaseSize() {
        // Standard lease V2 size: LeaseKey(16) + LeaseState(4) + Flags(4) + reserved fields
        return 32;
    }

    @Override
    public int size() {
        // Context header: 16 bytes
        // Name: 4 bytes ("DLse")
        // Padding: 4 bytes (to align data to 8-byte boundary)