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POAuto-generate form fields for a Form in django
 

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    <p>I have some models and I want to generate a multi-selection form from this data. So the form would contain an entry for each category and the choices would be the skills in that category.</p> <p><strong>models.py</strong></p> <pre><code>class SkillCategory(models.Model): name = models.CharField(max_length=50) class Skill(models.Model): name = models.CharField(max_length=50) category = models.ForeignKey(SkillCategory) </code></pre> <p>Is there a way to auto-generate the form fields? I know I can manually add a 'SkillCategory' entry in the form for each SkillCategory, but the reason to have it as a model is so skills and skillcategories can be edited freely.</p> <p>I want to do something like this: (I tried this, but didn't get it to work, don't remember the exact error...)</p> <p><strong>forms.py</strong></p> <pre><code>class SkillSelectionForm(forms.Form): def __init__(*args, **kwargs): super(SkillSelectionForm, self).__init__(*args, **kwargs) for c in SkillCategory.objects.all(): category_skills = [(pk, s.name) for s in c.skill_set.all()] setattr(self, c.name, forms.MultipleChoiceField(choices=category_skills, widget=forms.CheckboxSelectMultiple)) </code></pre> <hr> <p><strong>SOLUTION</strong> </p> <p>This creates a form field entry using the SkillCategory.name and assigns choices as those in Skill. field_name/display_name are used to avoid issues with non-ascii <em>category names</em>.</p> <p><strong>forms.py</strong></p> <pre><code>def get_categorized_skills(): skills = {} for s in Skill.objects.values('pk', 'name', 'category__name').order_by('category__name'): if s['category__name'] not in skills.keys(): skills[s['category__name']] = [] skills[s['category__name']].append((s['pk'], s['name'])) return skills class SkillSelectionForm(forms.Form): def __init__(self, *args, **kwargs): super(SkillSelectionForm, self).__init__(*args, **kwargs) skills = get_categorized_skills() for idx, cat in enumerate(skills.keys()): field_name = u'category-{0}'.format(idx) display_name = cat self.fields[field_name] = forms.MultipleChoiceField(choices=skills[cat], widget=forms.CheckboxSelectMultiple, label=display_name) </code></pre>
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