Question

如果数据不重复，我想检查文档中的字段（pv_time），然后在pv_time和其他字段中插入数据。在其他字段中，允许复制。使用$addToSet我正在尝试这样做。

这是我的python代码：

 for row in results.get('rows'):
    path = row[0]
    feedbackId = row[1]
    pvDate = row[2]+' '+row[3]+':'+row[4]
    city = row[5]
    country = row[6]
    pageviews = int(row[7])
    db.customer_feedback_requests_archive.update({'feedback_request_id':ObjectId(feedbackId)},{'$addToSet':{'pv_time.'+path:pvDate},'$push':{'pv_city.'+path:city,'pv_country.'+path:country},'$inc':{'pv_count.'+path:pageviews}})

如果我第一次运行它会给出

{
        "_id" : ObjectId("558d3900996f95a24aa69ef3"),
        "feedback_request_id" : ObjectId("5665015a882a5174379d4dbd"),
        "pv_count" : {
                "main-rating" : 2
        },
        "pv_city" : {
                "main-rating" : [
                        "Bengaluru",
                        "Bengaluru"
                ]
        },
        "pv_country" : {
                "main-rating" : [
                        "India",
                        "India"
                ]
        },
        "pv_time" : {
                "main-rating" : [
                        "20151208 10:00",
                        "20151208 10:01"
                ]
        }
}

但如果我两次完成这项工作，那么它会给出：

{
        "_id" : ObjectId("558d3900996f95a24aa69ef3"),
        "feedback_request_id" : ObjectId("5665015a882a5174379d4dbd"),
        "pv_count" : {
                "main-rating" : 4
        },
        "pv_city" : {
                "main-rating" : [
                        "Bengaluru",
                        "Bengaluru",
                        "Bengaluru",
                        "Bengaluru"
                ]
        },
        "pv_country" : {
                "main-rating" : [
                        "India",
                        "India",
                        "India",
                        "India"
                ]
        },
        "pv_time" : {
                "main-rating" : [
                        "20151208 10:00",
                        "20151208 10:01"
                ]
        }
}

我希望pv_city和pv_country中的重复值仅在pv_time不同的情况下才会出现，而在第二次我期望pv_time未更新时，它应该不会更新pv_city和pv_country。

Answer 1

它相当简单，你只需要稍微扩展你的查询。

db.customer_feedback_requests_archive.update(
  {'feedback_request_id':ObjectId(fee‌dbackId),'pv_time.'+path:{'$ne':pvDate}},
  {'$addToSet':{'pv_time.'+path:pvDate},'$‌push':{'pv_city.'+path:city,'pv_country.'+path:country},'$inc':{'pv_count.'+path:‌pageviews}}
)

额外查询参数的作用是，它将搜索数组是否已有日期。如果它不存在，则更新将触发，这将解决您的问题。

如何检查$ addToSet在mongodb中返回true或false？

1 个答案: