in my collection,
has related different documents, and only one field is different between them, assuming field
how to merge different related documents into one document
and turn this field into an array of fields [],
is it done through aggregation?
there are 200000 data in the data, and each data has a typical list of words of 5000 length [{aVl1}, {bju 2},.], and typical dictionaries of 5000 length {{aRom 1}, {bjr 2},.}, use pyMongo to find100 data, the traversal of cursor is particularly slow, is...
how to count the total number of documents after pymongo aggregation query? related codes match1 = { $match : { regDate : {"$gte": datetime(2018, 6, 1), "$lt": datetime(2018, 6, 30)}}} lookup = { $lookup : { ...
mongodb involves updating multiple tables and has no transaction. How to deal with it ...
-sharp ! usr bin python3 -sharp encoding=utf-8 import db from pymongo import MongoClient user = db.get_db_user() recharge = db.get_db_recharge() consume = db.get_db_consume() client = MongoClient( localhost , 27017) db = client.test col_new = db.new ...
problem description how do I insert an array into Collection? If item_id exists, do not insert? for example: item_arr = [ { item_id : 1 , title : AAA }, { item_id : 2 , title : BBB } ] I would ...
I have written a crawler. When writing the mongo class insert function, I want to add a judgment statement to avoid crawling data to load data repeatedly, but from the actual running situation, it is not feasible. Please take a look at the code first. ...
problem description scrapy gives parse, different methods for the same url. Some can execute, and some cannot . the environmental background of the problems and what methods you have tried related codes urls=[ http: maoyan.com xseats 20180930015...
index = self.xiaoMiQuanCollection.createIndex ({ "unique_charcter ": 1, "name ": hashed }, { "unique ": True}) res = self.xiaoMiQuanCollection.find (index) TypeError: Collection object is not callable. If you meant to call the createIndex ...
mongodb cookie cookie db.coolection.update({"cookie":"kr_stat_uuid=s83pP25734456; download_animation=1; device-uid=9447e910-f90a-11e8-85f3-853e28e448cb; kr_plus_id=643809727; krnewsfrontss=e88ee1dafbc74062e5286b2ad050d1c2; M-XSRF-TOKEN...
there is such a set of data nationHOLwage avg23 ...