Query Set Annotate with two different query sets
I'm new to joining two query sets with django orm manipulations. Here is my request. I have two data sets. 1st data set has three columns which are datetime, col1 and 2nd data set has start_date,end_date,week_num. Output data should be weeknum, col1. How can I use django to combine these two models?
First data set:
datetime col1
2018-10-04 08:00:00 10
Second data set:
start_date end_date week_num
2018-10-04 07:00:00 2018-10-11 07:00:00 42
Output data set:
weeknum col1
42 10
My code so far:
qs1=models.dataset1.objects.all()
qs2=models.dataset2.objects.all()
I know I'm just putting in the basic datasets, but I'm unable to move any further.
SQL Query for this would be like:
select weeknum, col1 from datatset1 d1, dataset2 d2 where
d1.datettime>d2.start_date and d1.datetime<d2.end_date;
Any help on this is greatly appreciated. Thanks.
django django-rest-framework django-queryset
asked Nov 19 '18 at 19:10
ReddyReddy
63
add a comment |
I'm new to joining two query sets with django orm manipulations. Here is my request. I have two data sets. 1st data set has three columns which are datetime, col1 and 2nd data set has start_date,end_date,week_num. Output data should be weeknum, col1. How can I use django to combine these two models?
First data set:
datetime col1
2018-10-04 08:00:00 10
Second data set:
start_date end_date week_num
2018-10-04 07:00:00 2018-10-11 07:00:00 42
Output data set:
weeknum col1
42 10
My code so far:
qs1=models.dataset1.objects.all()
qs2=models.dataset2.objects.all()
I know I'm just putting in the basic datasets, but I'm unable to move any further.
SQL Query for this would be like:
select weeknum, col1 from datatset1 d1, dataset2 d2 where
d1.datettime>d2.start_date and d1.datetime<d2.end_date;
Any help on this is greatly appreciated. Thanks.
django django-rest-framework django-queryset
asked Nov 19 '18 at 19:10
ReddyReddy
63
add a comment |
I'm new to joining two query sets with django orm manipulations. Here is my request. I have two data sets. 1st data set has three columns which are datetime, col1 and 2nd data set has start_date,end_date,week_num. Output data should be weeknum, col1. How can I use django to combine these two models?
First data set:
datetime col1
2018-10-04 08:00:00 10
Second data set:
start_date end_date week_num
2018-10-04 07:00:00 2018-10-11 07:00:00 42
Output data set:
weeknum col1
42 10
My code so far:
qs1=models.dataset1.objects.all()
qs2=models.dataset2.objects.all()
I know I'm just putting in the basic datasets, but I'm unable to move any further.
SQL Query for this would be like:
select weeknum, col1 from datatset1 d1, dataset2 d2 where
d1.datettime>d2.start_date and d1.datetime<d2.end_date;
Any help on this is greatly appreciated. Thanks.
django django-rest-framework django-queryset
asked Nov 19 '18 at 19:10
ReddyReddy
63
I'm new to joining two query sets with django orm manipulations. Here is my request. I have two data sets. 1st data set has three columns which are datetime, col1 and 2nd data set has start_date,end_date,week_num. Output data should be weeknum, col1. How can I use django to combine these two models?
First data set:
datetime col1
2018-10-04 08:00:00 10
Second data set:
start_date end_date week_num
2018-10-04 07:00:00 2018-10-11 07:00:00 42
Output data set:
weeknum col1
42 10
My code so far:
qs1=models.dataset1.objects.all()
qs2=models.dataset2.objects.all()
I know I'm just putting in the basic datasets, but I'm unable to move any further.
SQL Query for this would be like:
select weeknum, col1 from datatset1 d1, dataset2 d2 where
d1.datettime>d2.start_date and d1.datetime<d2.end_date;
Any help on this is greatly appreciated. Thanks.
django django-rest-framework django-queryset
django django-rest-framework django-queryset
asked Nov 19 '18 at 19:10
ReddyReddy
63
asked Nov 19 '18 at 19:10
ReddyReddy
63
asked Nov 19 '18 at 19:10
ReddyReddy
63
asked Nov 19 '18 at 19:10
ReddyReddy
63
asked Nov 19 '18 at 19:10
ReddyReddy
63
63
add a comment |
add a comment |
1 Answer
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You won't be able to use querysets to combine since they're designed to be model-specific (w/the exception of proxy and abstract models).
You can however use a list comprehension to combine them or use itertools.chain (more efficient) to combine the two results from the querysets.
However, you'll lose out on the "laziness" of the queryset, which may have performance ramifications later.
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
add a comment |
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1 Answer
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1 Answer
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active
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You won't be able to use querysets to combine since they're designed to be model-specific (w/the exception of proxy and abstract models).
You can however use a list comprehension to combine them or use itertools.chain (more efficient) to combine the two results from the querysets.
However, you'll lose out on the "laziness" of the queryset, which may have performance ramifications later.
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
add a comment |
You won't be able to use querysets to combine since they're designed to be model-specific (w/the exception of proxy and abstract models).
You can however use a list comprehension to combine them or use itertools.chain (more efficient) to combine the two results from the querysets.
However, you'll lose out on the "laziness" of the queryset, which may have performance ramifications later.
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
add a comment |
You won't be able to use querysets to combine since they're designed to be model-specific (w/the exception of proxy and abstract models).
You can however use a list comprehension to combine them or use itertools.chain (more efficient) to combine the two results from the querysets.
However, you'll lose out on the "laziness" of the queryset, which may have performance ramifications later.
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
You won't be able to use querysets to combine since they're designed to be model-specific (w/the exception of proxy and abstract models).
You can however use a list comprehension to combine them or use itertools.chain (more efficient) to combine the two results from the querysets.
However, you'll lose out on the "laziness" of the queryset, which may have performance ramifications later.
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
answered Nov 20 '18 at 3:09
yrekkehsyrekkehs
2571413
2571413
add a comment |
add a comment |
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