I have a webapp that allows users to create their own fields to be rendered in a form later on.
I have a model Formfield like so:
class Formfield(db.Model):
id = db.Column(db.Integer, primary_key = True)
form_id = db.Column(db.Integer, db.ForeignKey('formbooking.id'))
label = db.Column(db.String(80))
placeholder_text = db.Column(db.String(80))
help_text = db.Column(db.String(500))
box_checked = db.Column(db.Boolean, nullable = True, default = False)
options = db.Column(db.String) # JSON goes here?
answer = db.Column(db.String)
required = db.Column(db.Boolean, nullable = False, default = False)
order = db.Column(db.Integer)
fieldtype = db.Column(db.Integer)
that I use to represent a field, whatever the kind (checkbox, input, more in the future).
As you can see, every field has a FK to a form_id.
I’m trying to generate a dynamic form for a given form_id. The catch is that I need to determine the type of field to render for every Formfield. So I also need to process the fieldtype at some point.
I guess a solution would be to somehow pass the form_id to a function in my Form class.
I have no clue how to do it or where to look for a solution.
Any help would be very appreciated!
I think I managed to create dynamic forms with the idea from here https://groups.google.com/forum/#!topic/wtforms/cJl3aqzZieA
you have to create a dynamic form at view function, fetch the form field you want to get, and iterate every field to construct this form object. I used for fieldtypes simple text instead of integer values. Since it seems easy to read at code level.
class FormView(MethodView):
def get(self):
class DynamicForm(wtforms.Form): pass
dform = main.models.Form.objects.get(name="name2")
name = dform.name
for f in dform.fields:
print f.label
setattr(DynamicForm , f.label, self.getField(f))
d = DynamicForm() # Dont forget to instantiate your new form before rendering
for field in d:
print field # you can see html output of fields
return render_template("customform.html", form=d)
def getField(self, field):
if field.fieldtype == "text":
return TextField(field.label)
if field.fieldtype == "password":
return PasswordField(field.label)
# can extend if clauses at every new fieldtype
for a simple form render jinja template 'forms.html'
{% macro render(form) -%}
<fieldset>
{% for field in form %}
{% if field.type in ['CSRFTokenField', 'HiddenField'] %}
{{ field() }}
{% else %}
<div class="form-group {% if field.errors %}error{% endif %}">
{{ field.label }}
<div class="input">
{% if field.name == "body" %}
{{ field(rows=10, cols=40) }}
{% else %}
{{ field() }}
{% endif %}
{% if field.errors or field.help_text %}
<span class="help-inline">
{% if field.errors %}
{{ field.errors|join(' ') }}
{% else %}
{{ field.help_text }}
{% endif %}
</span>
{% endif %}
</div>
</div>
{% endif %}
{% endfor %}
</fieldset>
{% endmacro %}
and customform.html is like this
{% extends "base.html" %}
{% import "forms.html" as forms %}
{% block content %}
{{ forms.render(form) }}
{% endblock %}