我如何在 DynamoDB (Python) 中对嵌套属性使用 FilterExpression？

Question

这是我的 json 模型：

item=item={"Company":"ABCD",
               "Industry":"Invest.Services",
               "Sector":"Financial",
               "Financial_Results":
                             [{"Date":"2007-03-31","Frequency":"Annual","REV1":"20","REV3":"33"},
                              {"Date":"2008-03-31","Frequency":"Annual","REV1":"20","REV3":"34.43"},
                              {"Date":"2012-03-31","Frequency":"Annual","REV1":"30","REV3":Decimal("230")},
                              {"Date":"2013-03-31","Frequency":"Quarterly","REV1":Decimal("30"),"REV3":"3.32"},
                              {"Date":"2013-06-31","Frequency":"Quarterly","REV1":Decimal("20"),"REV3":"-0.343"},
                              {"Date":"2013-09-31","Frequency":"Quarterly","REV1":"20.50","REV3":"-0.543"}]
             }
    table.put_item(Item=item)

item=item={"Company":"EFGH",
               "Industry":"Mining",
               "Sector":"Metals",
               "Financial_Results":
                             [{"Date":"2007-03-31","Frequency":"Annual","REV1":"20","REV3":"33"},
                              {"Date":"2008-03-31","Frequency":"Annual","REV1":"20","REV3":"34.43"},
                              {"Date":"2012-03-31","Frequency":"Annual","REV1":"30","REV3":Decimal("230")},
                              {"Date":"2013-03-31","Frequency":"Quarterly","REV1":Decimal("30"),"REV3":"3.32"},
                              {"Date":"2013-06-31","Frequency":"Quarterly","REV1":Decimal("20"),"REV3":"-0.343"},
                              {"Date":"2014-03-31","Frequency":"Annual","REV1":"20.50","REV3":"-0.543"}]
             }
    table.put_item(Item=item)

公司 - 分区键（哈希键）。

无范围键（排序键）。

我的要求是：

我如何过滤等于或大于“2013-03-31”的 'Date' 属性和仅小于零项的 'REV1' 属性。

注意：我参考了以下 link http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.Attributes.html#DocumentPaths

我仍然没有得到任何 conclusions.Kindly 帮助。提前致谢

Answer 1

研发了一天终于找到答案了。 根据 AWS DynamoDB 文档和其他认真的研究，我得出结论，我的 json 模型准备（顶部）目前不受支持。根据我的要求，我需要展平我的数据而不是每个贡献者的文档 basis.Thanks。

我如何在 DynamoDB (Python) 中对嵌套属性使用 FilterExpression？

How can i use FilterExpression over Nested Attributes in DynamoDB (Python)?

python

boto

amazon-web-services

amazon-dynamodb

boto3