Ok. I will work on opening a ticket based on your recommendation, though I
will not have your depth of analysis on the problem. Mind if I quote your
most recent explanation if needed?

Greg

On Tue, Jun 23, 2009 at 8:41 AM, Karen Tracey <kmtra...@gmail.com> wrote:

> On Mon, Jun 22, 2009 at 2:19 PM, Erik Vorhes <e...@textivism.com> wrote:
>
>>
>> On Mon, Jun 22, 2009 at 12:52 PM, Greg Corey<gregco...@gmail.com> wrote:
>> > Karen, the double % ( i.e. 'discount%%') worked. Is this a big enough
>> bug
>> > that it should be reported? I'm not sure what is a bug and what is just
>> my
>> > ignorance. Thank you sooo much for the help.
>>
>> The first % escapes the second % sign, and thus allows for the actual
>> symbol to display. This is because Python uses % to include variables,
>> etc., into a string. So it's not a bug at all.
>>
>
> But we're talking about the the db_column parameter for a model field
> definition here.  I don't see that it's at all obvious that one should need
> to escape % symbols there.  I see how down in the depths of passing SQL to
> the database (for the one backend I looked at, MySQL) it needs to have been
> done, when args are being passed with the SQL, because the DB backend is
> going to use string interpolation to place the args into the SQL and if the
> % in the column name hasn't been escaped there won't be enough actual passed
> args  for the interpolation.
>
> But I don't know if that code is the same for all backends, nor do I know
> if Django consistently uses and empty tuple for the no-args case vs. passing
> None for args.  If it ever does the latter, doubling the % in the db_column
> specification won't work because when None is passed for args string
> interpolation isn't done, and the doubled % would be passed as the column
> name.
>
> All in all I think it would be good to open a ticket to track this.  I
> don't have time to look into it any more deeply right now.
>
> Karen
>
> >
>

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