2
我試圖put
嵌套entity/dict
成使用Python
數據存儲,ValueError異常:未知的protobuf ATTR類型<類的字典'>當試圖把一個嵌套字典/實體
metadata_row = dict()
metadata_row['batch_id'] = str(uuid1())
metadata_row['table_ok'] = True
metadata_row['table_name'] = 'metadata'
metadata_row['num_rows'] = 1
metadata_row['violations'] = []
metadata_row['errors'] = []
metadata_row['time'] = {}
metadata_row['time']['total_time'] = 82.42656564712524
metadata_row['time']['mod1'] = 5.940682411193848
metadata_row['time']['mod2'] = 19.16786551475525
metadata_row['time']['mod3'] = 31.617812633514404
metadata_row['time']['mod4'] = 0.00038933753967285156
metadata_row['time']['mod5'] = 53.35780310630798
with self.client.transaction():
entities = [Entity(self.client.key('metadata')) for i in range(len([metadata_row]))]
for entity, update_dict in zip(entities, [metadata_row]):
entity.update(update_dict)
self.client.put_multi(entities)
我通過使用datastore emulator
測試它,但我得到以下錯誤,
ValueError: Unknown protobuf attr type <class 'dict'>
我想知道如何解決這個問題。我也想知道datastore
原生支持嵌套字典,因爲在這種情況下,不需要爲內部字典創建entity
,即time
。
UPDATE。我在metadata_row
中爲time
加了一個內部實體來解決這個問題。
client = datastore.Client()
metadata_row['time'] = datastore.Entity(key=client.key('time'))
metadata_row['time']['total_time'] = 82.42656564712524
metadata_row['time']['mod1'] = 5.940682411193848
metadata_row['time']['mod2'] = 19.16786551475525
metadata_row['time']['mod3'] = 31.617812633514404
metadata_row['time']['mod4'] = 0.00038933753967285156
metadata_row['time']['mod5'] = 53.35780310630798
# code for put_multi()
不是100%確定,但我懷疑字典中的值應該在可接受的類型中(來自https://cloud.google.com/datastore/docs/concepts/entities#properties_and_value_types),其中不包括http://stardict.sourceforge.net/Dictionaries.php下載。也許json.dumps字典的值,並將其存儲爲一個字符串? –
@DanCornilescu我也嘗試過'json.dumps',它也可以工作,也許稍微比爲內部字典添加一個內部實體更好。 – daiyue
使用json.dumps時遇到同樣的問題。我認爲我們必須將嵌套值轉換爲「嵌入式實體」 –