Hello, I'd like to write a math exercice application. I need a model with a text field to store LaTeX source code and I though to write a validator that compiles (on the server side) the LaTeX source into a png image. In case of LaTeX errors, it would print the LaTeX error output in the form and in case of a success, generate an image that I want to store in a upload field in the same table. I did not find detailed documentation about this kind of stuff (custom validator that writes another field). Could you point me to some examples to begin with ? For example, how do you generate with PIL and store image thumbnails in web2py ?
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