python - Using a class field in another fields -

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i have field in class depends on field in same class have problem code:

class myclass(models.model): nation = [('sp', 'spain'), ('fr', 'france')] nationality = models.charfield(max_length=2, choices=nation) first_name = models.charfield(max_length=2, choices=name)

i want put name = [('ro', 'rodrigo'), ('ra', 'raquel')] if nation = spain , name = [('lu', 'luis'), ('ch', 'chantal')] if nation = france.

how can that? thanks!

i think want change view user sees. have above underlying db model wrong place sort of feature.

in addition (assuming web application), need in javascript, can change set of allowed names user changes nationality field.


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