Wagtail Model Forms

The Wagtail Form Builder functionalities available for your models/snippets.

Features

Well-known Form Builder functionalities
Form block for StreamField support
Extensible models (Form, FormSubmission & FormBlock)
Reports

Requirements

Python 3
Django >= 2.2.8
Wagtail >= 2

Installation

Install the package

pip install wagtail-model-forms

Add wagtail_model_forms to your INSTALLED_APPS

INSTALLED_APPS = [
    ...
    "wagtail_model_forms",
]

Create your models

from django.utils.functional import cached_property
from modelcluster.fields import ParentalKey
from wagtail.core.models import Page
from wagtail.snippets.models import register_snippet
from wagtail_model_forms.mixins import FormSnippetMixin
from wagtail_model_forms.models import AbstractForm, AbstractFormField, AbstractFormSubmission


class FormField(AbstractFormField):
    model = ParentalKey(
        "Form",
        on_delete=models.CASCADE,
        related_name="form_fields",
    )


class FormSubmission(AbstractFormSubmission):
    form = models.ForeignKey(
        "Form",
        on_delete=models.CASCADE,
        related_name="+",
        verbose_name=_("Form"),
    )


@register_snippet
class Form(AbstractForm):
    @cached_property
    def edit_url(self):
        # return your url here, commonly your own modeladmin configuration
        url_helper = FormModelAdmin().url_helper
        return url_helper.get_action_url("edit", self.id)


class MyPage(FormSnippetMixin, Page):
    pass

In order to let the page now that there is a form on it (handle post methods, caching etc.) we need to make sure the method page_has_form returns True. To make your life easier you can set the property streamfields with the names of the StreamField which can have the form added. Also make sure the name of the block is matched, commonly called form in your list of blocks. In some cases you might want to override this method and implement your own bespoke logic here.

from wagtail_model_forms.blocks import FormBlock


class MyPage(FormSnippetMixin, Page):
    block_type = "form" # has by default already the value form
    streamfields = ["content"] # the name of your streamfields
    
    content = StreamField([
      # your other blocks
      ("form", FormBlock()),
    ])

More advanced with your bespoke implementation

from django.utils.functional import cached_property


class MyPage(FormSnippetMixin, Page):
    @cached_property
    def page_has_form(self):
        # your bespoke import in order to determine a form is on the page

It's not mandatory to use the register_snippet functionality. You can e.g. use wagtailmodelchooser for it or any other bespoke implementation in order to put the form on your page.

Settings

WAGTAIL_MODEL_FORMS_ADD_NEVER_CACHE_HEADERS`

Default True

WAGTAIL_MODEL_FORMS_FORM_MODEL

Must be of the form app_label.model_name

WAGTAIL_MODEL_FORMS_SUBMISSION_MODEL

Must be of the form app_label.model_name

WAGTAIL_MODEL_FORMS_REPORTS`

Default True

Templates

wagtail_model_forms/form.html

{% if not request.form_success is self.form.id %}
<form action="" method="POST" novalidate>
    {% csrf_token %}
    <input type="hidden" name="form_id" value="{{ self.form.id }}">
    {{ form.as_ul }}
    <button type="submit">Submit</button>
</form>
{% else %}
    <p>Form success</p>
{% endif %}

FAQ

The form is not submitted

Make sure you have added the FormSnippetMixin and implemented the page_has_form method correctly.

Request is not available in get_context of FormBlock

Make sure you render your blocks in your templates with include_block, see https://docs.wagtail.org/en/stable/topics/streamfield.html.

Stormheg / wagtail-model-forms