Assignment Week4 <Ozlem Karaboga> #33
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| const result = await collection.aggregate([ | ||
| { | ||
| $match: { Year: year, Age: age } |
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At the moment this only aggregate per age and year, it is lacking something to also group per continent
| const accountsCollection = database.collection("accounts"); | ||
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| const session = client.startSession(); | ||
| session.startTransaction(); |
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This looks really good, really easy to read.
Another way of doing the exact same thing would be to use withTransaction I am mentioning it as you might see it in someone else work
| @@ -44,11 +45,9 @@ const getContinentInformationByYearAndAge = async (year, age) => { | |||
| }, | |||
| { | |||
| $addFields: { | |||
| TotalPopulation: { $add: ["$M", "$F"] } | |||
| TotalPopulation: { $add: ["$M", "$F"] }, | |||
| Country: "$Country", | |||
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This adds the fields to your result but it does not filter or aggregate per continent.
What we are looking for is something that in the end would have one object per continent year and age, lucky for us, the dataset already have those information, At this point you will need to look into the dataset itself to find if you have some data about continents instead of countries (maybe search for Europe and see what it result on)
I would advise, since the data is stored in mongodb to use the power from mongodb and javascript to figure our what the Country field can be and maybe search into it what could be used to have the data per continents
| { Country: { $regex: /^[A-Z]+$/ } }, | ||
| { Country: { $not: { $regex: /world/i } } }] |
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This will work but I will have the same remarks that I had here https://github.com/HackYourAssignment/databases-cohort48/pull/37/files#r1760597771
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Thanks for updating your code :) |
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