Django talk: Re: use of annotate in django query

in brief, I want to transform this query in django query

On Wed, 2 Jun 2021 at 21:56, Eugene TUYIZERE <eugenetuyizere@gmail.com> wrote:

Dear Sebatian,

This is what I get:

SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-03 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-04 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-05 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-06 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-07 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-08 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-09 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-10 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-11 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-12 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-13 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-14 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-15 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-16 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-17 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-18 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-19 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-20 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-21 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-22 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-23 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-24 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-25 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-26 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-27 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-28 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-29 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-30 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-05-31 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-06-01 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL
SELECT `crms_customer_requests`.`arrival_date`, COUNT(`crms_customer_requests`.`request_name`) AS `count` FROM `crms_customer_requests` WHERE `crms_customer_requests`.`arrival_date` >= 2021-06-02 GROUP BY `crms_customer_requests`.`arrival_date` ORDER BY NULL

On Wed, 2 Jun 2021 at 21:53, Sebastian Jung <sebastian.jung2@gmail.com> wrote:
Hi Eugene,

Please make Print(report.query) then you get SQL querys and Most of time i get an Idea what's wrong

Regards

Eugene TUYIZERE <eugenetuyizere@gmail.com> schrieb am Mi., 2. Juni 2021, 21:41:
Dear Team,

I need help. I am working on a project where one of the tables is about requests. I want to have a report of the number of requests on each day in the last 30 days, something like this:
I I used the code below just before displaying on the chart but the code gives me wrong information

def reqChart(request):
current_date = date.today()
days_before = date.today()-timedelta(days=30)
for dt in daterange(days_before,current_date):
reports = Customer_Requests.objects.filter(arrival_date__gte=dt).\
extra({'day':"date(arrival_date)"}).\
values('arrival_date').annotate(count=Count('request_name'))
print(reports)

And I need help
--
TUYIZERE Eugene

Msc Degree in Mathematical Science

African Institute for Mathematical Sciences (AIMS Cameroon)
Crystal Garden-Lime, Cameroon

Bsc in Computer Science

UR-Nyagatare Campus

Email: eugene.tuyizere@aims-cameroon.org
eugenetuyizere@gmail.com

Tel: (+250) 7 88 26 33 38, (+250) 7 22 26 33 38

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--
TUYIZERE Eugene

Msc Degree in Mathematical Science

African Institute for Mathematical Sciences (AIMS Cameroon)
Crystal Garden-Lime, Cameroon

Bsc in Computer Science

UR-Nyagatare Campus

Email: eugene.tuyizere@aims-cameroon.org
eugenetuyizere@gmail.com

Tel: (+250) 7 88 26 33 38, (+250) 7 22 26 33 38