On Mon, Feb 16, 2009 at 10:40 AM, alain31 <asoy...@free.fr> wrote:
>
> Hello,
> I plan to use django for some projects with heavy use of math formulas
> and I would like to create a reusable custom field to store LaTeX
> strings and to get a png image on disk after compilation. The usage
> would go like this :
> model:
> formula = LatexField()
> template to get the png:
> {{model.formula.url}}
> Before saving the field, I compile the string on server with LaTeX and
> make a png stored in a local file.
>
> I have the following question : I need to store in the database the
> LaTeX string as well as the url of the
> png image and I wonder how to do it (I looked at FileField,
> ImageField but only the url is saved in the database). Another point,
> it would be nice to create a specific form to see the errors during
> LaTeX compilation and to correct them before saving the field in the
> database.
>
> Any suggestions, starting point in docs ?
> Thanks.
>
> >
>
Here's a guide on writing a custom model field:
http://docs.jezdez.com/howto/custom-model-fields.html . My guess is you'll
actually need 2 real fields in the DB, with one psuedofield similar to the
generic foreign key that actually handles combining those 2 into a real
item.
Alex
--
"I disapprove of what you say, but I will defend to the death your right to
say it." --Voltaire
"The people's good is the highest law."--Cicero
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