Annotate and count django
I have a Word model, it has many to many relation with Phrase model
I want to get rid of this loop because it's not effective in terms of performance:
for w in words:
w.freq = w.phrases.count()
w.save()
I know I should use annotate and subquery, I have found this question
Django: how to annotate queryset with count of filtered ForeignKey field?
But don't really understand how I should do it in my case
django
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
add a comment |
I have a Word model, it has many to many relation with Phrase model
I want to get rid of this loop because it's not effective in terms of performance:
for w in words:
w.freq = w.phrases.count()
w.save()
I know I should use annotate and subquery, I have found this question
Django: how to annotate queryset with count of filtered ForeignKey field?
But don't really understand how I should do it in my case
django
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
Possible Duplicate stackoverflow.com/questions/30449960/…
– Ty C
Nov 13 '18 at 23:03
@TyC If you give a try and read my question just a little bit more carefully, you will see, that it doesn't have anything regarding update vs save but The question was about the loop
– user2950593
Nov 14 '18 at 0:19
add a comment |
I have a Word model, it has many to many relation with Phrase model
I want to get rid of this loop because it's not effective in terms of performance:
for w in words:
w.freq = w.phrases.count()
w.save()
I know I should use annotate and subquery, I have found this question
Django: how to annotate queryset with count of filtered ForeignKey field?
But don't really understand how I should do it in my case
django
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
I have a Word model, it has many to many relation with Phrase model
I want to get rid of this loop because it's not effective in terms of performance:
for w in words:
w.freq = w.phrases.count()
w.save()
I know I should use annotate and subquery, I have found this question
Django: how to annotate queryset with count of filtered ForeignKey field?
But don't really understand how I should do it in my case
django
django
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
asked Nov 13 '18 at 22:48
user2950593user2950593
1,77242670
1,77242670
Possible Duplicate stackoverflow.com/questions/30449960/…
– Ty C
Nov 13 '18 at 23:03
@TyC If you give a try and read my question just a little bit more carefully, you will see, that it doesn't have anything regarding update vs save but The question was about the loop
– user2950593
Nov 14 '18 at 0:19
add a comment |
Possible Duplicate stackoverflow.com/questions/30449960/…
– Ty C
Nov 13 '18 at 23:03
@TyC If you give a try and read my question just a little bit more carefully, you will see, that it doesn't have anything regarding update vs save but The question was about the loop
– user2950593
Nov 14 '18 at 0:19
Possible Duplicate stackoverflow.com/questions/30449960/…
– Ty C
Nov 13 '18 at 23:03
Possible Duplicate stackoverflow.com/questions/30449960/…
– Ty C
Nov 13 '18 at 23:03
@TyC If you give a try and read my question just a little bit more carefully, you will see, that it doesn't have anything regarding update vs save but The question was about the loop
– user2950593
Nov 14 '18 at 0:19
@TyC If you give a try and read my question just a little bit more carefully, you will see, that it doesn't have anything regarding update vs save but The question was about the loop
– user2950593
Nov 14 '18 at 0:19
add a comment |
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Possible Duplicate stackoverflow.com/questions/30449960/…
– Ty C
Nov 13 '18 at 23:03
@TyC If you give a try and read my question just a little bit more carefully, you will see, that it doesn't have anything regarding update vs save but The question was about the loop
– user2950593
Nov 14 '18 at 0:19