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ObjectId.toString()
Returns the string representation of the 返回ObjectId(). ObjectId()的字符串表示形式。This string value has the format of 此字符串值的格式为ObjectId(...).ObjectId(...)。
The following example calls the 以下示例在toString() method on an ObjectId() instance in mongosh:mongosh中的ObjectId()实例上调用toString()方法：
ObjectId("507c7f79bcf86cd7994f6c0e").toString()
This will return the following string:这将返回以下字符串：
ObjectId("507c7f79bcf86cd7994f6c0e")
You can confirm the type of this object using the following operation:您可以使用以下操作确认此对象的类型：
typeof ObjectId("507c7f79bcf86cd7994f6c0e").toString()