How to sort in mongoDb using gem 'mongo' with Ruby (Sinatra)?

Question

I NUMBERED THE SORTING SHOWS IN RED BOX :

I have the following codes, but I failed to sort the data fetched from MongoDb.

display_order = field in DB

MongoConnect = Mongo::Client.new(127.0.0.1:27017, :database => 'my_db')

MongoConnect[:clients].find(:year => '2015').sort({month: 1})

I searched that sort function has ONLY 2 possible value:

1 is Ascending

-1 is Descending

It seems correct because I tried to put like ' asc/desc ' or ' ascending/descending ' value, and I got error as Invalid value for sort.

As you can see in the screenshot, the sorting is not properly done. It sorts the data, by getting first all with 1 .

BUT I want to sort it in ASCENDING order.

Is it due to STRING data? If YES how can I fix it?

Please help!

Answer 1

If your fields contain strings they will be sorted as such. If you want them to be sorted as integers then you must store them as integers.

Answer 2

My mistake , I thought before I cannot use unqouted value when creating records since I'm using mongo-express as GUI .

My first way when adding value to month field:

{
    "_id": ObjectID(""),
    "year": "2015",
    "month": "1",
    "value": "90"
}

I thought, the value should always be quoted .

Now, my function for sorting is working. Just removing the qoutes as setting value to month field.

As shown below:

{
    "_id": ObjectID(""),
    "year": "2015",
    "month": 1,
    "value": "90"
}

I hope this will help others, and don't do the same mistake I made :D