Opened 9 years ago
Closed 9 years ago
#25768 closed Uncategorized (invalid)
Cast Variable, and provide multiplication
Reported by: | Ben Liyanage | Owned by: | nobody |
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Component: | Uncategorized | Version: | 1.8 |
Severity: | Normal | Keywords: | QuerySet.extra |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description
Hey,
I'm trying to do an orm query and have run into two scenarios where I believe I need to use extra. The two scenarios are:
Type Casting
Casting a column to an int. Specifically, I have a boolean column that I need to do something like this:
select column::int
Multiplication
I need to multiply a column by a constant, or another column. Specifically the column from the previous cast.
select new_column * -1
select column1 * column2
Full Select Example
Ultimately I need to combine the above two like this:
select bool_column::int * -1 * another_int_column
Change History (3)
comment:1 by , 9 years ago
comment:2 by , 9 years ago
Yea I actually I found most of this stuff a couple hours later. I was able to reproduce this functionality with F, Case, When, Value, and Q.
comment:3 by , 9 years ago
Resolution: | → invalid |
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Status: | new → closed |
I think
Cast
is covered by #24932.I think Django already supports multiplication in F expressions. Does that work for your case?
For future reference, please keep a ticket limited to 1 request.