MongoEngine fieldDoesNotExist 错误但实际上是

Question

我有一堂课：

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class POI(Document):\n    location = PointField(required=True)\n    name = StringField(default='')\n    generate_by = IntField(required=True)\n    status = StringField(default='Active')\n    colle\xd1\x81ted_by = IntField()\n    time_created = DateTimeField(default=datetime.datetime.now)\n

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当我尝试插入时

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POI(location=[55.430212, 30.521000], generate_by=1241254, name="Sample", collected_by=None)\n

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发生错误

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mongoengine.errors.FieldDoesNotExist: The fields "{'collected_by'}" do not exist on the document "POI"\n

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怎么了？

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Answer 1

实际上，两个“collected_by”字符串中有一个微小的拼写错误，这使得它们不同，出于某种原因，您在这里使用的“c”：

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class POI(Document):\n    location = PointField(required=True)\n    name = StringField(default=\'\')\n    generate_by = IntField(required=True)\n    status = StringField(default=\'Active\')\n    colle\xd1\x81ted_by = IntField()\n         ^\n         |\n

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不是常规的拉丁语“c”，而是一个看起来与拉丁语“c”完全相同的西里尔字符。

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实际上：

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• 拉丁语“c”（https://www.codetable.net/decimal/99）
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• 西里尔文“\xd1\x81”（https://www.codetable.net/decimal/1089）
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见下文：

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In [16]: "collected_by" == "colle\xd1\x81ted_by"\nOut[16]: False\n\nIn [17]: "\xd1\x81" == "c"\nOut[17]: False\n\nIn [20]: ord("\xd1\x81"), ord("c")\nOut[20]: (1089, 99)\n

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如果你让它们相同，代码就会像魅力一样工作

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