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POHow to validate django form only when adding not editing
 

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  1. POHow to validate django form only when adding not editing
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    <p>How could we make the django form to not validate if we are editing, not adding a new record. The code as following :</p> <pre><code>class PageForm(forms.Form): name = forms.CharField(max_length=100,widget=forms.TextInput(attrs={'class':'textInput'})) description = forms.CharField(max_length=300, required=False,widget=forms.TextInput(attrs={'class':'textInput'})) body = forms.CharField(widget=forms.Textarea) template = forms.CharField(max_length=30,widget=forms.TextInput(attrs={'class':'textInput'})) navbar = forms.BooleanField(required=False, widget=forms.Select(choices=(('True','True'), ('False', 'False')))) publish = forms.BooleanField(widget=forms.Select(choices=(('Published','Publish Now'), ('Private','Private'), ('Draft','Draft')))) def save(self, page=None, commit=True): data = self.cleaned_data if not page: page = models.Page(key_name=data['name'].replace(' ','-')) page.name = data['name'] page.description = data['description'] page.body = data['body'] page.template = data['template'] page.publish = data['publish'] if commit: page.put() return page # prevent the same page 's name def clean_name(self): name = self.cleaned_data['name'] query = models.Page.all(keys_only=True) query.filter('name = ', name) page = query.get() if page: raise forms.ValidationError('Page name "%s" was already used before' % name) return name </code></pre> <p>The purpose of this name validation is to prevent the records with the same name. BUt i found that, it also validate on edit, so we couldn't edit records, since it will said 'records with same name already exist'. </p> <p>Actually for editing, the page param on save function wont be none, but prev record instead, and wil be none on saving a new one. But how we read this param, on clean_name function so we can now whether it is editing or creating?</p> <p>Thanks a lot!</p>
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    1. COAny reason you are not using the ModelForm to generate the form from the Page model instead? With key_name as a unique SlugField
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