濡備綍璁剧疆pydantic瀛楁鐨勯粯璁ゅ€兼潵鑾峰彇褰撳墠鏃堕棿锛燄煈忓湪杩欑鎯呭喌涓嬶紝涓嶈浣跨敤default锛岃€屾槸浣跨敤default_factory銆備袱鑰呯殑鍖哄埆濡備笅::paramdefault:鐢变簬杩欐槸鏇挎崲瀛楁鐨勯粯璁ゅ€硷紝鎵€浠ュ畠鐨勭涓€涓弬鏁扮敤浜庤缃粯璁ゅ€硷紝浣跨敤鐪佺暐鍙?``...``)琛ㄧず璇ュ瓧娈垫槸蹇呴渶鐨勶細paramdefault_factory锛氬綋姝ゅ瓧娈甸渶瑕侀粯璁ゅ€兼椂灏嗚皟鐢ㄧ殑鍙皟鐢ㄥ嚱鏁板鏋滃悓鏃惰缃簡鈥渄efault鈥濆拰鈥渄efault_factory鈥濓紝鍒欎細寮曞彂閿欒銆傗潓鎴戜滑鏉ョ湅閿欒鐨勪緥瀛愶紝鍗抽粯璁よ幏鍙栧綋鍓嶆椂闂达細鏇挎崲锛坱zinfo=timezone.utc锛塩lassStruct锛圔aseModel锛夛細releaseDate锛氬彲閫塠datetime]=Field锛坉efault=get_utc_now_timestamp锛堬級锛夋墦鍗帮紙Struct锛堬級銆俽eleaseDate锛塼ime.sleep锛?锛夋墦鍗帮紙Struct锛堬級銆俽eleaseDate)鍙互鐪嬪嚭涓ゆ鏄竴鏍风殑锛屼笉鏄兂瑕佺殑缁撴灉锛?022-01-2714:16:23.876755+00:002022-01-2714:16:23.876755+00:00鉁呰鎴戜滑鐪嬬湅default_factory:fromdatetimeimportdatetime,timezonefrompydanticimportBaseModel,FieldfromtypingimportOptionalimporttimedefget_utc_now_timestamp()->鏃ユ湡鏃堕棿锛氳繑鍥瀌atetime.utcnow().replace(tzinfo=timezone.utc)classStruct(BaseModel):releaseDate:Optional[datetime]=Field(default_factory=get_utc_now_timestamp)print(Struct().releaseDate)time.sleep(1)print(Struct().releaseDate)鍙互鐪嬪埌涓や釜鏃堕棿闂撮殧1绉掞紝灏辨槸鎯宠鐨勭粨鏋溾潳锔?022-01-2714:15:55.195409+00:002022-01-2714:15:56.200775+00:00
