Django 1.8 QuerySet: .extra syntax in Q object
Multi tool use
0
I have several complex SQL Statements which are used to filter a django Queryset using .extra().
qs.extra(where=["my_jsonb_field-->'my_key'::text LIKE %s"], params=["myValue"])
Since these are queries on json fields, there is no possibility to get rid of these statements (at least not with django 1.8). Is it possible to use Q() objects with the .extra() syntax?
# Q has no .extra
Q().extra(...)
# Q has no .raw
Q().raw(...)
django django-queryset django-1.8 django-q
asked Nov 20 '18 at 14:55
MohlMohl
908
|
show 1 more comment
0
I have several complex SQL Statements which are used to filter a django Queryset using .extra().
qs.extra(where=["my_jsonb_field-->'my_key'::text LIKE %s"], params=["myValue"])
Since these are queries on json fields, there is no possibility to get rid of these statements (at least not with django 1.8). Is it possible to use Q() objects with the .extra() syntax?
# Q has no .extra
Q().extra(...)
# Q has no .raw
Q().raw(...)
django django-queryset django-1.8 django-q
asked Nov 20 '18 at 14:55
MohlMohl
908
extra()andraw()work onQuerySetobjects, not onQobjects. Just make aQuerySetfirst, (e.g.qs = MyModel.objects.filter(q)whereqis yourQ()object) then it'll work.
– dirkgroten
Nov 20 '18 at 15:15
I want to use Q objects (or something similar) to run the statement as shown above, not do the query and then additional filtering. As I've stated, there are several of them - sometimes I'd need to chain them together using AND, sometimes using OR, which would be the perfect use case for Q objects IF they'd have .extra(), hence the question.
– Mohl
Nov 20 '18 at 15:29
It’s not possible. But that shouldn’t be a problem: creating aQuerySetdoesn’t “run the statement” (it’ll run only when you actually render the result or iterate through the elements) and sinceQuerySets are sets, you can chain them to achieve OR or AND behavior using theunion(),intersection()anddifference()methods.
– dirkgroten
Nov 20 '18 at 15:52
1
Still, you nudged me into the right direction - I could get the raw SQL usingqs.query, concatenate the strings manually withraw_queries.join(' UNION ')(orINTERSECTorEXCEPT) and putting the resulting string into a new QuerySet usingqs.raw()! Thanks!
– Mohl
Nov 21 '18 at 9:10
1
Time to move to Django 1.11 :-) Note that Django 1.8 isn't supported anymore since april so there are security issues that haven't been fixed.
– dirkgroten
Nov 21 '18 at 9:26
|
show 1 more comment
0
0
0
1
I have several complex SQL Statements which are used to filter a django Queryset using .extra().
qs.extra(where=["my_jsonb_field-->'my_key'::text LIKE %s"], params=["myValue"])
Since these are queries on json fields, there is no possibility to get rid of these statements (at least not with django 1.8). Is it possible to use Q() objects with the .extra() syntax?
# Q has no .extra
Q().extra(...)
# Q has no .raw
Q().raw(...)
django django-queryset django-1.8 django-q
asked Nov 20 '18 at 14:55
MohlMohl
908
I have several complex SQL Statements which are used to filter a django Queryset using .extra().
qs.extra(where=["my_jsonb_field-->'my_key'::text LIKE %s"], params=["myValue"])
Since these are queries on json fields, there is no possibility to get rid of these statements (at least not with django 1.8). Is it possible to use Q() objects with the .extra() syntax?
# Q has no .extra
Q().extra(...)
# Q has no .raw
Q().raw(...)
django django-queryset django-1.8 django-q
django django-queryset django-1.8 django-q
asked Nov 20 '18 at 14:55
MohlMohl
908
asked Nov 20 '18 at 14:55
MohlMohl
908
asked Nov 20 '18 at 14:55
MohlMohl
908
asked Nov 20 '18 at 14:55
MohlMohl
908
asked Nov 20 '18 at 14:55
MohlMohl
908
908
extra()andraw()work onQuerySetobjects, not onQobjects. Just make aQuerySetfirst, (e.g.qs = MyModel.objects.filter(q)whereqis yourQ()object) then it'll work.
– dirkgroten
Nov 20 '18 at 15:15
I want to use Q objects (or something similar) to run the statement as shown above, not do the query and then additional filtering. As I've stated, there are several of them - sometimes I'd need to chain them together using AND, sometimes using OR, which would be the perfect use case for Q objects IF they'd have .extra(), hence the question.
– Mohl
Nov 20 '18 at 15:29
It’s not possible. But that shouldn’t be a problem: creating aQuerySetdoesn’t “run the statement” (it’ll run only when you actually render the result or iterate through the elements) and sinceQuerySets are sets, you can chain them to achieve OR or AND behavior using theunion(),intersection()anddifference()methods.
– dirkgroten
Nov 20 '18 at 15:52
1
Still, you nudged me into the right direction - I could get the raw SQL usingqs.query, concatenate the strings manually withraw_queries.join(' UNION ')(orINTERSECTorEXCEPT) and putting the resulting string into a new QuerySet usingqs.raw()! Thanks!
– Mohl
Nov 21 '18 at 9:10
1
Time to move to Django 1.11 :-) Note that Django 1.8 isn't supported anymore since april so there are security issues that haven't been fixed.
– dirkgroten
Nov 21 '18 at 9:26
|
show 1 more comment
extra()andraw()work onQuerySetobjects, not onQobjects. Just make aQuerySetfirst, (e.g.qs = MyModel.objects.filter(q)whereqis yourQ()object) then it'll work.
– dirkgroten
Nov 20 '18 at 15:15
I want to use Q objects (or something similar) to run the statement as shown above, not do the query and then additional filtering. As I've stated, there are several of them - sometimes I'd need to chain them together using AND, sometimes using OR, which would be the perfect use case for Q objects IF they'd have .extra(), hence the question.
– Mohl
Nov 20 '18 at 15:29
It’s not possible. But that shouldn’t be a problem: creating aQuerySetdoesn’t “run the statement” (it’ll run only when you actually render the result or iterate through the elements) and sinceQuerySets are sets, you can chain them to achieve OR or AND behavior using theunion(),intersection()anddifference()methods.
– dirkgroten
Nov 20 '18 at 15:52
1
Still, you nudged me into the right direction - I could get the raw SQL usingqs.query, concatenate the strings manually withraw_queries.join(' UNION ')(orINTERSECTorEXCEPT) and putting the resulting string into a new QuerySet usingqs.raw()! Thanks!
– Mohl
Nov 21 '18 at 9:10
1
Time to move to Django 1.11 :-) Note that Django 1.8 isn't supported anymore since april so there are security issues that haven't been fixed.
– dirkgroten
Nov 21 '18 at 9:26
extra() and raw() work on QuerySet objects, not on Q objects. Just make a QuerySet first, (e.g. qs = MyModel.objects.filter(q) where q is your Q() object) then it'll work.– dirkgroten
Nov 20 '18 at 15:15
extra() and raw() work on QuerySet objects, not on Q objects. Just make a QuerySet first, (e.g. qs = MyModel.objects.filter(q) where q is your Q() object) then it'll work.– dirkgroten
Nov 20 '18 at 15:15
I want to use Q objects (or something similar) to run the statement as shown above, not do the query and then additional filtering. As I've stated, there are several of them - sometimes I'd need to chain them together using AND, sometimes using OR, which would be the perfect use case for Q objects IF they'd have .extra(), hence the question.
– Mohl
Nov 20 '18 at 15:29
I want to use Q objects (or something similar) to run the statement as shown above, not do the query and then additional filtering. As I've stated, there are several of them - sometimes I'd need to chain them together using AND, sometimes using OR, which would be the perfect use case for Q objects IF they'd have .extra(), hence the question.
– Mohl
Nov 20 '18 at 15:29
It’s not possible. But that shouldn’t be a problem: creating a
QuerySet doesn’t “run the statement” (it’ll run only when you actually render the result or iterate through the elements) and since QuerySets are sets, you can chain them to achieve OR or AND behavior using the union(), intersection() and difference() methods.– dirkgroten
Nov 20 '18 at 15:52
It’s not possible. But that shouldn’t be a problem: creating a
QuerySet doesn’t “run the statement” (it’ll run only when you actually render the result or iterate through the elements) and since QuerySets are sets, you can chain them to achieve OR or AND behavior using the union(), intersection() and difference() methods.– dirkgroten
Nov 20 '18 at 15:52
1
1
Still, you nudged me into the right direction - I could get the raw SQL using
qs.query, concatenate the strings manually with raw_queries.join(' UNION ') (or INTERSECT or EXCEPT) and putting the resulting string into a new QuerySet using qs.raw()! Thanks!– Mohl
Nov 21 '18 at 9:10
Still, you nudged me into the right direction - I could get the raw SQL using
qs.query, concatenate the strings manually with raw_queries.join(' UNION ') (or INTERSECT or EXCEPT) and putting the resulting string into a new QuerySet using qs.raw()! Thanks!– Mohl
Nov 21 '18 at 9:10
1
1
Time to move to Django 1.11 :-) Note that Django 1.8 isn't supported anymore since april so there are security issues that haven't been fixed.
– dirkgroten
Nov 21 '18 at 9:26
Time to move to Django 1.11 :-) Note that Django 1.8 isn't supported anymore since april so there are security issues that haven't been fixed.
– dirkgroten
Nov 21 '18 at 9:26
|
show 1 more comment
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extra()andraw()work onQuerySetobjects, not onQobjects. Just make aQuerySetfirst, (e.g.qs = MyModel.objects.filter(q)whereqis yourQ()object) then it'll work.– dirkgroten
Nov 20 '18 at 15:15
I want to use Q objects (or something similar) to run the statement as shown above, not do the query and then additional filtering. As I've stated, there are several of them - sometimes I'd need to chain them together using AND, sometimes using OR, which would be the perfect use case for Q objects IF they'd have .extra(), hence the question.
– Mohl
Nov 20 '18 at 15:29
It’s not possible. But that shouldn’t be a problem: creating a
QuerySetdoesn’t “run the statement” (it’ll run only when you actually render the result or iterate through the elements) and sinceQuerySets are sets, you can chain them to achieve OR or AND behavior using theunion(),intersection()anddifference()methods.– dirkgroten
Nov 20 '18 at 15:52
1
Still, you nudged me into the right direction - I could get the raw SQL using
qs.query, concatenate the strings manually withraw_queries.join(' UNION ')(orINTERSECTorEXCEPT) and putting the resulting string into a new QuerySet usingqs.raw()! Thanks!– Mohl
Nov 21 '18 at 9:10
1
Time to move to Django 1.11 :-) Note that Django 1.8 isn't supported anymore since april so there are security issues that haven't been fixed.
– dirkgroten
Nov 21 '18 at 9:26