mongodb $ne null
You can't use the same property name twice in the same JS object, so $ne: "", $ne: null } becomes $ne: null } as the last occurrence of the ..., $ne selects the documents where the value of the field is not equal to the ... Because pymongo represents mongo "null" as python "None".
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 mongodb $ne null 相關參考資料
$ne — MongoDB Manual
$ne selects the documents where the value of the field is not equal to the ... Consider the following example which uses the $ne operator with a field in an ... https://docs.mongodb.com $ne: "", $ne: null } is not working - Stack Overflow
You can't use the same property name twice in the same JS object, so $ne: "", $ne: null } becomes $ne: null } as the last occurrence of the ... https://stackoverflow.com How do you query for "is not null" in Mongo? - Stack Overflow
$ne selects the documents where the value of the field is not equal to the ... Because pymongo represents mongo "null" as python "None". https://stackoverflow.com Mongo $ne : null} not working as expected - Stack Overflow
I know it's an old question, and might not be relevant anymore, but as there was no accepted answer, I thought I'll comment for anyone looking ... https://stackoverflow.com Mongodb query for array property ne null not working - Stack Overflow
I'm trying to execute a query like: array.0.property: $ne: null}} . It return nothing even if all documents have this property different from null. https://stackoverflow.com MongoDB 中找出非空的VALUE, NOT NULL
MongoDB 中找出非空的VALUE, NOT NULL 的方法: ... 注意$exists 无法利用到索引， 但$NE 可以用上索引， 所以处于性能的考虑尽可能用$ne:null. https://www.askmaclean.com mongodb中find $ne null 与$exists的区别- xiojing的博客
db.test.find("info.age":"$ne":null}}). 1. info 为[] 的也会被找到。网上找了下没找到具体解释。 "_id" : ObjectId("5be29949f1acad52e4c10b98") ... https://blog.csdn.net mongodb中find $ne null 與$exists的區別- IT閱讀
db.test.find("info.age":"$ne":null}}). info 為[] 的也會被找到。網上找了下沒找到具體解釋。 "_id" : ObjectId("5be29949f1acad52e4c10b98") ... https://www.itread01.com Query for Null or Missing Fields — MongoDB Manual
This page provides examples of operations that query for null values using the db.collection.find() method in the mongo shell. The examples on this page use ... https://docs.mongodb.com Query where not equal to null or empty - Stack Overflow
.find( "email": "$nin": [ null, "" ] } }). The problem is $ne is repeated twice and overwrites. You could use $or but $nin is shorter: Given: https://stackoverflow.com |