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POHow to pass extra value to given field's process_formdata method in WTForms
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  1. POHow to pass extra value to given field's process_formdata method in WTForms
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    copied!<p>I have custom ZIPCodeField, but it require country to be given to work properly, it's easy for validation where i can just save it in _country attribute of the form in form's <strong>init</strong>(with fallback to country field in the same form), it looks like:</p> <pre><code>class ZIPCodeField(wtforms.TextField): def pre_validate(self, form): if not self.data: return country = country = getattr(form, '_country', form.data.get('country')) country = country.upper() if not validate_zip_code(self.data, country): raise ValueError(self.gettext(u'Invalid ZIP code.')) </code></pre> <p>but there is a problem with for process_formdata method (where I want to pass the received data trough simple filter to format the ZIP code correctly), we have no form instance, so seems like there are 2 solutions:</p> <p>Saving country on field level, like:</p> <pre><code>class ZIPCodeField(wtforms.TextField): def process_formdata(self, valuelist): if valuelist: self.data = format_zip_code(valuelist[0], self._country) else: self.data = '' class TestForm(wtforms.Form): zip_code = ZIPCodeField() form = TestForm(MultiDict([('zip_code', '123455')])) form.zip_code._country = u'US' </code></pre> <p>Or, overide process method and pass my extra value to it's data argument, like:</p> <pre><code>class ZIPCodeField(wtforms.TextField): def process(self, formdata, data): # we picking country value from data here pass form = TestForm(MultiDict([('zip_code', '123455')]), zip_code=zip_code={'country': u'US'}) </code></pre> <p>Which of these is proper solution? or there is better solution?</p>
 

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