Add dynamic field to django admin model form

You can accomplish what you're trying by overriding ModelAdmin but you also need to override ModelAdmin.get_fieldsets. This answer might help you out. The OP in the link has a similar problem as well.

Edit: If you don't want an editable field you can try overriding ModelAdmin.get_readonly_fields. Also check here for more attributes to override.

You have to add it to the readonly_fields list.

class SetAdmin(admin.ModelAdmin):
    list_display = ['many other fields', 'show_set_url']
    readonly_fields = ['show_set_url']

    def show_set_url(self, obj):
            return '<a href="#">Set</a>' # render depends on other fields

Relevant documentation.

You can create dynamic fields and fieldset using the form meta class. Sample code is given below. Add the loop logic as per you requirements.

class CustomAdminFormMetaClass(ModelFormMetaclass):
    """
    Metaclass for custom admin form with dynamic field
    """
    def __new__(cls, name, bases, attrs):
        for field in myloop: #add logic to get the fields
            attrs[field] = forms.CharField(max_length=30) #add logic to the form field
        return super(CustomAdminFormMetaClass, cls).__new__(cls, name, bases, attrs)


class CustomAdminForm(six.with_metaclass(CustomAdminFormMetaClass, forms.ModelForm)):
    """
    Custom admin form
    """

    class Meta:
        model = ModelName
        fields = "__all__" 


class CustomAdmin(admin.ModelAdmin):
    """
    Custom admin 
    """

    fieldsets = None
    form = CustomAdminForm

    def get_fieldsets(self, request, obj=None):
        """
        Different fieldset for the admin form
        """
        self.fieldsets = self.dynamic_fieldset(). #add logic to add the dynamic fieldset with fields
        return super(CustomAdmin, self).get_fieldsets(request, obj)

    def dynamic_fieldset(self):
        """
        get the dynamic field sets
        """
        fieldsets = []
        for group in get_field_set_groups: #logic to get the field set group
            fields = []
            for field in get_group_fields: #logic to get the group fields
                fields.append(field)

            fieldset_values = {"fields": tuple(fields), "classes": ['collapse']}
            fieldsets.append((group, fieldset_values))

        fieldsets = tuple(fieldsets)

        return fieldsets