[FIXED] Creating a Django form from a dictionary of objects

Issue

I feel like this must be really simple, but after a couple of days of trying I'm officially clueless.

I have a dictionary where the keys are objects and the values are lists of objects. Here's how I want to use that info to construct a form:

for object in dictionary:
    name_of_field = object.slug
    name_of_field = forms.ModelMultipleChoiceField(widgets=forms.CheckboxSelectMultiple, queryset=dictionary[object]) 

Of course, just putting name_of_field in there twice doesn't work to generate dynamically named fields. What this actually does is create a single field called "name_of_field" using the final object it iterates over. I wish it would create a field for every key in the dictionary, named using the key object's slug and with a choice set of that key's values.

Is there a way to loop through this dictionary and create the form fields I want? I feel like the answer lies in superclassing __init__, but I still can't wrap my head around how to get multiple fields with different names.

Solution

You don't say where you are using this code. You should be putting it into the form's __init__ method, from where you can reference self.fields:

class DynamicForm(forms.Form):
    def __init__(self, *args, **kwargs):
        dynamic_fields = kwargs.pop('dynamic_fields')
        super(DynamicForm, self).__init__(*args, **kwargs)
        for key, value in dynamic_fields:
            self.fields[key.slug] = forms.ModelMultipleChoiceField(widget=forms.CheckboxSelectMultiple, queryset=value)

Answered By - Daniel Roseman