Form.initial
Use initial to declare the initial value of form fields at runtime. For example, you might want to fill in a username field with the username of the current session.
To accomplish this, use the initial argument to a Form. This argument, if given, should be a dictionary mapping field names to initial values. Only include the fields for which you’re specifying an initial value; it’s not necessary to include every field in your form. For example:
1 | >>> f = ContactForm(initial={'subject': 'Hi there!'}) |
These values are only displayed for unbound forms, and they’re not used as fallback values if a particular value isn’t provided.
If a Field defines initial and you include initial when instantiating the Form, then the latter initial will have precedence. In this example, initial is provided both at the field level and at the form instance level, and the latter gets precedence:
1 2 3 4 5 6 7 8 9 10 | >>> from django import forms>>> class CommentForm(forms.Form):... name = forms.CharField(initial='class')... url = forms.URLField()... comment = forms.CharField()>>> f = CommentForm(initial={'name': 'instance'}, auto_id=False)>>> print(f)<tr><th>Name:</th><td><input type="text" name="name" value="instance" required /></td></tr><tr><th>Url:</th><td><input type="url" name="url" required /></td></tr><tr><th>Comment:</th><td><input type="text" name="comment" required /></td></tr> |
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