Re: Escape percent sign in QuerySet.extra() method

[Chris Cogdon]

On Sunday, December 2, 2012 1:55:05 AM UTC-8, Martin Svoboda wrote:
>
> Hello,
> I'm want to use functionality of postgresql module 
> pg_trgmin django. 
> pg_trgm uses special operator % (percent sign). I don't know how 
> should I escape it in query extra method.
>
> # pure SQL
> SELECT content, similarity(content, 'string') AS sml
>   FROM table
>   WHERE content % 'str'
>   ORDER BY sml DESC, content;
>
> # This throws exception IndexError 'tuple index out of range'
> # I tried to escape percent sign with %%, or \%, but I always get same 
> exception
> objects = MyModel.objects.extra(
> select={'rank': 'similarity(content, %s)'},
> select_params=[content],
> where='content % %s',
> params=[content],
> order_by=['-rank']
> )
>
> # Raw query works ok
> objects = MyModel.objects.raw('''SELECT *, similarity(content, %s) AS sml 
> FROM table WHERE content %% %s ORDER BY sml DESC''', [content, content])
>
> Can you help me how write percent sign in extra() method?
>

While this should not fix anything, can you try breaking it down like so.

objects = MyModel.objects.extra(
where='content % %s',
params=[content],
)

objects = objects.extra(
select={'rank': 'similarity(content, %s)'},
select_params=[content],
order_by=['-rank']
)

That'll give us a hint at which of the two parts are giving us a problem.


>

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Escape percent sign in QuerySet.extra() method

[Martin Svoboda]

Hello,
I'm want to use functionality of postgresql module 
pg_trgmin django. 
pg_trgm uses special operator % (percent sign). I don't know how 
should I escape it in query extra method.

# pure SQL
SELECT content, similarity(content, 'string') AS sml
  FROM table
  WHERE content % 'str'
  ORDER BY sml DESC, content;

# This throws exception IndexError 'tuple index out of range'
# I tried to escape percent sign with %%, or \%, but I always get same 
exception
objects = MyModel.objects.extra(
select={'rank': 'similarity(content, %s)'},
select_params=[content],
where='content % %s',
params=[content],
order_by=['-rank']
)

# Raw query works ok
objects = MyModel.objects.raw('''SELECT *, similarity(content, %s) AS sml 
FROM table WHERE content %% %s ORDER BY sml DESC''', [content, content])

Can you help me how write percent sign in extra() method?

Thank you

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