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PODjango wizard: Form instantiated and clean called multiple times
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  1. PODjango wizard: Form instantiated and clean called multiple times
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    copied!<p>I have a form wizard with 3 forms. The first form has only one field and uses that field to do a lookup in an external API to validate the data.</p> <p>I noticed that the requests were taking unusually long, so I just added a print statement to the form's <strong>init</strong> method and to the external API client call.</p> <p>It seems that my first form is being initialized and cleaned exactly 28 times every time I execute that step in the form wizard.</p> <p>My first form looks like this:</p> <h1>forms.py</h1> <pre><code>class MyForm1(forms.Form): issue_id = forms.CharField() def __init__(self, *args, **kwargs): print "init form 1" super(MyForm1, self).__init__(*args, **kwargs) def clean(self): cleaned_data = super(MyForm1, self).clean() print "clean issue id" issue_id = cleaned_data.get("issue_id") if issue_id is not None: try: issue = ApiCLient.get_issue(issue_id) except APIError: raise forms.ValidationError("Issue not found. Try again!") else: return cleaned_data raise forms.ValidationError("Issue not found. Try again!") </code></pre> <p>The wizard stuff is pretty standard from the Django Docs, but here it goes:</p> <h1>views.py</h1> <pre><code>class MyWizard(SessionWizardView): def done(self, form_list, **kwargs): # some logic at the end of the wizard </code></pre> <h1>urls.py</h1> <pre><code>wizard_forms = [MyForm1, MyForm2, MyForm3] ... url(r'wizard/$', login_required(views.MyWizard.as_view(wizard_forms))), </code></pre> <p>As I said before, executing the first step results in </p> <pre><code>init form 1 clean issue id </code></pre> <p>Being printed to console exactly 28 times.</p> <p>Any ideas? Is this a feature or a bug in the Django Form Wizard?</p>
 

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