lostplaces-backend/django_lostplaces/lostplaces/forms.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

''' (web)forms that can be used elsewhere. '''

from django import forms
from django.db import models
from django.contrib.auth.forms import UserCreationForm, UserChangeForm
from django.contrib.auth.models import User
from django.utils.translation import ugettext_lazy as _
from lostplaces.models import Place, PlaceImage, Voucher, Explorer

class SignupVoucherForm(UserCreationForm):
    class Meta:
        model = User
        fields = ('username', 'email', 'first_name', 'last_name')
    voucher = forms.CharField(
        max_length=30,
        help_text=_('The Voucher you got from an administrator')
    )

    def is_valid(self):
        super().is_valid()
        submitted_voucher = self.cleaned_data.get('voucher')
        try:
            fetched_voucher = Voucher.objects.get(code=submitted_voucher)
        except Voucher.DoesNotExist:
            self.add_error('voucher', _('Invalid voucher'))
            return False

        if not fetched_voucher.valid:
            self.add_error('voucher', _('Expired voucher'))
            return False

        fetched_voucher.delete()
        return True

class ExplorerUserChangeForm(UserChangeForm):
    class Meta:
        model = User
        fields = [ 'username', 'first_name', 'last_name', 'email' ]
    ''' Hide password hint.'''
    password = None

    ''' Display username, but display it non-editable and not required. '''
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['username'].required = False
        self.fields['username'].help_text = None
        self.fields['username'].widget.attrs['disabled'] = 'disabled'
    
    def clean_username(self):
        # As shown in the above answer.
        instance = getattr(self, 'instance', None)
        if instance:
            return instance.username
        else:
            return self.cleaned_data.get('username', None)

class ExplorerChangeForm(forms.ModelForm):
    class Meta:
        model = Explorer
        fields = '__all__'
        exclude = ['user', 'favorite_places']

class PlaceForm(forms.ModelForm):
    class Meta:
        model = Place
        fields = '__all__'
        exclude = ['submitted_by', 'latitude', 'longitute']
    
    latitude = forms.IntegerField(
        widget=forms.NumberInput(attrs={'min':-90,'max': 90,'type': 'number'})
    )
    
    longitude = forms.IntegerField(
        widget=forms.NumberInput(attrs={'min':-180,'max': 180,'type': 'number'})
    )    
        
class PlaceImageForm(forms.ModelForm):
    class Meta:
        model = PlaceImage
        fields = ['filename']
        widgets = {
            'filename': forms.ClearableFileInput(attrs={'multiple': True})
        }

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.fields['filename'].required = False

class TagSubmitForm(forms.Form):
	tag_list = forms.CharField(
        max_length=500,
        required=False, 
        widget=forms.TextInput(attrs={'autocomplete':'off'})
        )