我假设你想sentiment
分别有count
字段与负值和正值与给定的门槛,即positive - >75
和negative - <75
,即积极情绪总数和消极情绪总数以及总情绪。
db.sentiments.aggregate([
{"$group" :
{_id: "$item",
sentiment: {$avg : "$sentiment_score"},
postiive_sentiments: {$sum: { $cond: { if: { $gt: [ "$sentiment_score", 75 ] }, then: 1, else: 0 } }},
negative_sentiments: {$sum: { $cond: { if: { $lt: [ "$sentiment_score", 75 ] }, then: 1, else: 0 } }},
count: {$sum: 1 }
}
},
{"$sort": { sentiment: -1 } }
])
的样本数据:
{ "_id" : ObjectId("5991329ea37dbc24842a68be"), "item" : "test1", "sentiment_score" : 50 }
{ "_id" : ObjectId("599132a2a37dbc24842a68bf"), "item" : "test1", "sentiment_score" : 40 }
{ "_id" : ObjectId("599132a4a37dbc24842a68c0"), "item" : "test1", "sentiment_score" : 80 }
{ "_id" : ObjectId("599132aba37dbc24842a68c1"), "item" : "test2", "sentiment_score" : 80 }
{ "_id" : ObjectId("599132ada37dbc24842a68c2"), "item" : "test2", "sentiment_score" : 30 }
{ "_id" : ObjectId("599132b0a37dbc24842a68c3"), "item" : "test2", "sentiment_score" : 38 }
{ "_id" : ObjectId("599132b6a37dbc24842a68c4"), "item" : "test3", "sentiment_score" : 78 }
{ "_id" : ObjectId("599132b9a37dbc24842a68c5"), "item" : "test3", "sentiment_score" : 88 }
{ "_id" : ObjectId("599132bba37dbc24842a68c6"), "item" : "test3", "sentiment_score" : 58 }
{ "_id" : ObjectId("599132c4a37dbc24842a68c7"), "item" : "test3", "sentiment_score" : 98 }
{ "_id" : ObjectId("599132cba37dbc24842a68c8"), "item" : "test4", "sentiment_score" : 65 }
{ "_id" : ObjectId("599132d2a37dbc24842a68c9"), "item" : "test4", "sentiment_score" : 30 }
{ "_id" : ObjectId("599132d6a37dbc24842a68ca"), "item" : "test4", "sentiment_score" : 10 }
//结果:
{ "_id" : "test3", "sentiment" : 80.5, "negative_sentiments" : 3, "positive_sentiments" : 1, "count" : 4 }
{ "_id" : "test1", "sentiment" : 56.666666666666664, "negative_sentiments" : 1, "positive_sentiments" : 2, "count" : 3 }
{ "_id" : "test2", "sentiment" : 49.333333333333336, "negative_sentiments" : 1, "positive_sentiments" : 2, "count" : 3 }
{ "_id" : "test4", "sentiment" : 35, "negative_sentiments" : 0, "positive_sentiments" : 3, "count" : 3 }
您需要提供样本文件 –
Januka嗨,文件的唯一重要字段中所示的那些代码 - “sentimentScore”是0到100之间的一个#,以及是项目名称的“item”。我想要做的就是添加代码我有这样的我有2个新字段返回给我的每个组项目,其中一个是该组中的项目#情绪分数<75和一个为> 75 – jbug123