Parsleyjs is a JavaScript library to do client side data validations. It does this in a non-intrusive way via adding a data-parsley-* attributes to form fields.
When you define a Django form, you get server side validations for free using the form field attributes. Django-parsley adds these validations to client side, by tagging your form with data-parsley-* attributes.
Parsley plays well with crispy-forms et all.
Demo at https://agiliq.com/demo/parsley/
django-parsley (or add to your requirements.txt)parsley to your INSTALLED_APPS (required for static files)If you're using parsley.js 1.x, make sure to set the parsley_namespace Meta attribute to parsley for backward compatibility.
class Meta:
parsley_namespace = 'parsley'
parsley provides a single class decorator called parsleyfy. Decorate your Form or ModelForm with parsleyfy to get the validations.
Eg.
from parsley.decorators import parsleyfy
@parsleyfy
class FieldTypeForm(forms.Form):
name = forms.CharField(min_length=3, max_length=30)
url = forms.URLField()
url2 = forms.URLField(required=False)
email = forms.EmailField()
email2 = forms.EmailField(required=False)
age = forms.IntegerField()
income = forms.DecimalField()
Your rendered form's HTML will look like this
<p><label for="id_name">Name:</label> <input data-parsley-required="true" data-parsley-minlength="3" maxlength="30" type="text" data-parsley-maxlength="30" id="id_name" name="name" /></p> <p><label for="id_url">Url:</label> <input type="text" data-parsley-required="true" data-parsley-type="url" name="url" id="id_url" /></p> <p><label for="id_url2">Url2:</label> <input type="text" data-parsley-type="url" name="url2" id="id_url2" /></p> <p><label for="id_email">Email:</label> <input type="text" data-parsley-required="true" data-parsley-type="email" name="email" id="id_email" /></p> <p><label for="id_email2">Email2:</label> <input type="text" data-parsley-type="email" name="email2" id="id_email2" /></p> <p><label for="id_age">Age:</label> <input type="text" data-parsley-required="true" data-parsley-type="digits" name="age" id="id_age" /></p> <p><label for="id_income">Income:</label> <input type="text" data-parsley-required="true" data-parsley-type="number" name="income" id="id_income" /></p>
Note the data-parsley-* attributes.
You could also do
FieldTypeForm = parsleyfy(FieldTypeForm)
Which is the same thing.
Put this form inside a
<form data-parsley-validate>
{{ form.as_p }}
</form>
Note
Make sure jquery.js and parsley.js are included in the template.
To add parsley validations to admin, use the ParsleyAdminMixin with your ModelAdmin like so:
class StudentAdmin(ParsleyAdminMixin, admin.ModelAdmin):
pass
Note
Use the parsley.django-admin.js helper from parsley static to auto-validate admin forms.
In addition to the default validators if you want to add extra client side validations or if you want to add custom validators, add a parsley_extras Meta attribute. For e.g if you wanted to add minlength and equalto validations on a PasswordChangeForm:
@parsleyfy
class PasswordChangeForm(BasePasswordChangeForm):
class Meta:
parsley_extras = {
'new_password1': {
'minlength': "5",
},
'new_password2': {
'equalto': "new_password1",
'error-message': "Your passwords do not match.",
},
}
To use a custom namespace for parsley (e.g when using parsley with the data-parsley-namespace option) you can provide a namespace by using the parsley_namespace Meta attribute.
class Meta:
parsley_namespace = 'custom'
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