X-Git-Url: https://git.mdrn.pl/prawokultury.git/blobdiff_plain/ad8ca731a4d54be4d3bfe6fabcb0591e645a1b5e..32320ed4776eecd9d38bc1a68191a0145403f3d3:/prawokultury/contact_forms.py?ds=sidebyside

diff --git a/prawokultury/contact_forms.py b/prawokultury/contact_forms.py
index bd4b556..8bd07eb 100644
--- a/prawokultury/contact_forms.py
+++ b/prawokultury/contact_forms.py
@@ -7,36 +7,119 @@ from contact.forms import ContactForm
 from contact.models import Contact
 from contact.fields import HeaderField
 from django.utils.functional import lazy
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import ugettext_noop as _
 from django.utils.safestring import mark_safe
 from migdal.models import Entry
 
+from prawokultury.countries import COUNTRIES, TRAVEL_GRANT_COUNTRIES
+
 mark_safe_lazy = lazy(mark_safe, unicode)
 
 
 class RegistrationForm(ContactForm):
     form_tag = 'register'
 
-    save_as_tag = '2015'
-    conference_name = u'CopyCamp 2015' 
+    save_as_tag = '2017'
+    conference_name = u'CopyCamp 2017'
+    notify_on_register = False
     
     form_title = _('Registration')
     admin_list = ['first_name', 'last_name', 'organization']
 
+    travel_grant_countries = TRAVEL_GRANT_COUNTRIES
+
     first_name = forms.CharField(label=_('First name'), max_length=128)
     last_name = forms.CharField(label=_('Last name'), max_length=128)
     contact = forms.EmailField(label=_('E-mail'), max_length=128)
-    organization = forms.CharField(label=_('Organization'), 
-            max_length=256, required=False)
-    country = forms.CharField(label=_('Country'), max_length=128)
-
-    # days = forms.ChoiceField(
-    #    label = _("I'm planning to show up on"),
-    #    choices=[
-    #        ('both', _('Both days of the conference')),
-    #        ('only-6th', _('November 6th only')),
-    #        ('only-7th', _('November 7th only')),
-    #    ], widget=forms.RadioSelect())
+    organization = forms.CharField(label=_('Organization'), max_length=256, required=False)
+    country = forms.ChoiceField(label=_('Country of residence'), choices=zip(COUNTRIES, COUNTRIES))
+    travel_grant = forms.BooleanField(
+        label=_('I require financial assistance to attend CopyCamp 2017.'), required=False)
+    travel_grant_motivation = forms.CharField(
+        label=_('Please write us about yourself and why you want to come to CopyCamp. '
+                'This information will help us evaluate your travel grant application:'),
+        help_text=_('Financial assistance for German audience is possible '
+                    'thanks to the funds of the German Federal Foreign Office transferred by '
+                    'the Foundation for Polish-German Cooperation.'),
+        widget=forms.Textarea, max_length=600, required=False)
+
+    days = forms.ChoiceField(
+       label=_("I'm planning to show up on"),
+       choices=[
+           ('both', _('Both days of the conference')),
+           ('only-28th', _('September 28th only')),
+           ('only-29th', _('September 29th only')),
+       ], widget=forms.RadioSelect())
+
+    # ankieta
+    times_attended = forms.ChoiceField(
+        required=False,
+        label=_("1. How many times have you attended CopyCamp?"),
+        choices=[
+            ('0', _('not yet')),
+            ('1', _('once')),
+            ('2', _('twice')),
+            ('3', _('three times')),
+            ('4', _('four times')),
+            ('5', _('five times')),
+        ], widget=forms.RadioSelect())
+    age = forms.ChoiceField(
+        required=False,
+        label=_("2. Please indicate your age bracket:"),
+        choices=[
+            ('0-19', _('19 or below')),
+            ('20-25', _('20-25')),
+            ('26-35', _('26-35')),
+            ('36-45', _('36-45')),
+            ('46-55', _('46-55')),
+            ('56-65', _('56-65')),
+            ('66+', _('66 or above')),
+        ], widget=forms.RadioSelect())
+    areas = forms.MultipleChoiceField(
+        required=False,
+        label=_("3. Please indicate up to 3 areas you feel most affiliated with"),
+        choices=[
+            ('sztuki plastyczne', _('visual art')),
+            ('literatura', _('literature')),
+            ('muzyka', _('music')),
+            ('teatr', _('theatre')),
+            ('film', _('film production')),
+            ('wydawanie', _('publishing')),
+            ('prawo', _('law')),
+            ('ekonomia', _('economy')),
+            ('socjologia', _('sociology')),
+            ('technika', _('technology')),
+            ('edukacja', _('education')),
+            ('studia', _('higher education')),
+            ('nauka', _('academic research')),
+            ('biblioteki', _('library science')),
+            ('administracja', _('public administration')),
+            ('ngo', _('nonprofit organisations')),
+            ('other', _('other (please specify below)')),
+        ], widget=forms.CheckboxSelectMultiple())
+    areas_other = forms.CharField(required=False, label=_('Fill if you selected “other” above'))
+    source = forms.ChoiceField(
+        required=False,
+        label=_("4. Please indicate how you received information about the conference:"),
+        choices=[
+            ('znajomi', _('through friends sharing on the web')),
+            ('znajomi2', _('through friends by other means')),
+            ('prasa', _('through press')),
+            ('fnp', _('directly through the Foundation\'s facebook or website')),
+            ('www', _('through other websites (please specify below)')),
+            ('other', _('other (please specify below)')),
+        ], widget=forms.RadioSelect())
+    source_other = forms.CharField(required=False, label=_('Fill if you selected “other” or “other website” above'))
+    motivation = forms.ChoiceField(
+        required=False,
+        label=_("6. Please indicate the most important factor for your willingness to participate:"),
+        choices=[
+            ('speaker', _('listening to particular speaker(s)')),
+            ('networking', _('good networking occasion')),
+            ('partnering', _('partnering with organisations present at the event')),
+            ('other', _('other (please specify below)')),
+        ], widget=forms.RadioSelect())
+    motivation_other = forms.CharField(required=False, label=_('Fill if you selected “other” above'))
 
     agree_mailing = forms.BooleanField(
         label=_('I am interested in receiving information about the Modern Poland Foundation\'s activities by e-mail'),
@@ -48,7 +131,7 @@ class RegistrationForm(ContactForm):
     )
     agree_license = forms.BooleanField(
         label=_('Permission for publication'),
-        help_text=_('I agree to having materials, recorded during the conference, released under the terms of <a href="http://creativecommons.org/licenses/by-sa/3.0/deed">CC BY-SA</a> license and to publishing my image.'),
+        help_text=mark_safe_lazy(_(u'I agree to having materials, recorded during the conference, released under the terms of <a href="http://creativecommons.org/licenses/by-sa/3.0/deed">CC\u00a0BY-SA</a> license and to publishing my image.')),
         required=False
     )
 
@@ -60,56 +143,117 @@ class RegistrationForm(ContactForm):
             url = Entry.objects.get(slug_pl='regulamin').get_absolute_url()
             self.fields['agree_toc'] = forms.BooleanField(
                 required=True,
-                label = mark_safe(_('I accept <a href="%s">Terms and Conditions of CopyCamp</a>') % url)
+                label=mark_safe(_('I accept <a href="%s">Terms and Conditions of CopyCamp</a>') % url)
             )
         except Entry.DoesNotExist:
             pass
 
+    def clean_areas(self):
+        data = self.cleaned_data['areas']
+        if len(data) > 3:
+            raise forms.ValidationError(_('Select at most 3 areas'))
+        return data
+
+    def clean(self):
+        cleaned_data = self.cleaned_data
+        country = cleaned_data['country']
+        travel_grant = cleaned_data['travel_grant']
+        motivation = cleaned_data['travel_grant_motivation']
+        if country not in self.travel_grant_countries and travel_grant:
+            raise forms.ValidationError(_('Travel grant is not provided for the selected country'))
+        if travel_grant and not motivation:
+            self._errors['travel_grant_motivation'] = _('Please provide this information')
+            raise forms.ValidationError(_('To apply for a travel grant you must provide additional information.'))
+        if not travel_grant and motivation:
+            cleaned_data['motivation'] = ''
+        return cleaned_data
+
+    def main_fields(self):
+        return [self[name] for name in (
+            'first_name', 'last_name', 'contact', 'organization', 'country',
+            'travel_grant', 'travel_grant_motivation', 'days')]
+
+    def survey_fields(self):
+        return [self[name] for name in (
+            'times_attended', 'age',
+            'areas', 'areas_other', 'source', 'source_other', 'motivation', 'motivation_other')]
+
+    def agreement_fields(self):
+        return [self[name] for name in ('agree_mailing', 'agree_data', 'agree_license', 'agree_toc')]
+
 
 tracks = (
-    _('Copyright and Art'),
-    _('Remuneration Models'),
-    _('Copyright, Education and Science'),
-    _('Technology, Innovation and Copyright'),
-    _('Copyright and Human Rights'),
-    _('Copyright Enforcement'),
-    _('Copyright Debate'),
-    _('Copyright Lawmaking'),
+    (_('business models, heritage digitization, remix'),
+     _('What are the boundaries of appropriation in culture? '
+       'Who owns the past and whether these exclusive rights allow to '
+       'control present and future? How to make money from creativity without selling yourself?')),
+    (_('health, food, security, and exclusive rights'),
+     _('Who owns medicines and equipment necessary to provide health care? '
+       'Who owns grain and machines used to harvest it? '
+       'To what extent exclusive rights can affect what you eat, '
+       'how you exercise, whether you can apply a specific treatment?')),
+    (_('text and data mining, machine learning, online education'),
+     _('Do you think own the data you feed to algorithms? Or maybe you think you own these algorithms? '
+       'What if you can’t mine the data because you actually don’t own any of those rights? '
+       'What does it mean to own data about someone, or data necessary for that person’s education?')),
+    (_('IoT: autonomous cars, smart homes, wearables'),
+     _('What does it mean to own exclusive rights to software and data used to construct autonomous agents? '
+       'What will it mean in a near future?')),
+    (_('hacking government data, public procurement, public aid in culture'),
+     _('Who owns information created using public money? How can this information be appropriated? '
+       'What is the role of government in the development of information infrastructure?')),
 )
 
 
 class RegisterSpeaker(RegistrationForm):
     form_tag = 'register-speaker'
-    save_as_tag = '2015-speaker'
+    save_as_tag = '2017-speaker'
     form_title = _('Open call for presentations')
+    notify_on_register = False
+
+    # inherited fields included so they are not translated
+    first_name = forms.CharField(label=_('First name'), max_length=128)
+    last_name = forms.CharField(label=_('Last name'), max_length=128)
+    organization = forms.CharField(label=_('Organization'),
+            max_length=256, required=False)
+    agree_mailing = forms.BooleanField(
+        label=_('I am interested in receiving information about the Modern Poland Foundation\'s activities by e-mail'),
+        required=False
+    )
+    agree_license = forms.BooleanField(
+        label=_('Permission for publication'),
+        help_text=mark_safe_lazy(_(u'I agree to having materials, recorded during the conference, released under the terms of <a href="http://creativecommons.org/licenses/by-sa/3.0/deed">CC\u00a0BY-SA</a> license and to publishing my image.')),
+        required=False
+    )
 
     presentation_thematic_track = forms.ChoiceField(
         label=_('Please select one thematic track'),
-        choices=[(t, t) for t in tracks], widget=forms.RadioSelect())
+        choices=[(t, mark_safe('<strong>%s</strong><p style="margin-left: 20px;">%s</p>' % (t, desc))) for t, desc in tracks],
+        widget=forms.RadioSelect())
 
-    bio = forms.CharField(label=mark_safe_lazy(
-        _('Short biographical note in Polish (max. 500 characters, fill <strong>at least</strong> one bio)')),
-                          widget=forms.Textarea, max_length=500, required=False)
-    bio_en = forms.CharField(label=_('Short biographical note in English (max. 500 characters)'), widget=forms.Textarea,
-                             max_length=500, required=False)
+    bio = forms.CharField(label=_('Short biographical note in English (max. 500 characters)'), widget=forms.Textarea,
+                          max_length=500, required=False)
     photo = forms.FileField(label=_('Photo'), required=False)
     phone = forms.CharField(label=_('Phone number'), max_length=64,
                             required=False,
                             help_text=_('Used only for organizational purposes.'))
 
-    # presentation = forms.BooleanField(label=_('Presentation'), required=False)
     presentation_title = forms.CharField(
-        label=mark_safe_lazy(_('Title of the presentation in Polish (fill <strong>at least</strong> one title)')),
+        label=mark_safe_lazy(_('Title of the presentation in English')),
         max_length=256, required=False)
-    presentation_title_en = forms.CharField(label=_('Title of the presentation in English'),
-                                            max_length=256, required=False)
-    # presentation = forms.FileField(label=_('Presentation'), required=False)
     presentation_summary = forms.CharField(label=_('Summary of presentation (max. 1800 characters)'),
                                            widget=forms.Textarea, max_length=1800)
 
-    presentation_post_conference_publication = forms.BooleanField(
-        label=_('I am interested in including my paper in the post-conference publication'),
-        required=False
+    # presentation_post_conference_publication = forms.BooleanField(
+    #     label=_('I am interested in including my paper in the post-conference publication'),
+    #     required=False
+    # )
+
+    agree_data = None
+
+    agree_terms = forms.BooleanField(
+        label=mark_safe_lazy(_(u'I accept <a href="/en/info/terms-and-conditions/">'
+                               u'CopyCamp Terms and Conditions</a>.'))
     )
 
     # workshop = forms.BooleanField(label=_('Workshop'), required=False)
@@ -120,6 +264,7 @@ class RegisterSpeaker(RegistrationForm):
 
     def __init__(self, *args, **kw):
         super(RegisterSpeaker, self).__init__(*args, **kw)
+        self.started = getattr(settings, 'REGISTRATION_SPEAKER_STARTED', False)
         self.closed = getattr(settings, 'REGISTRATION_SPEAKER_CLOSED', False)
         self.fields.keyOrder = [
             'first_name',
@@ -128,33 +273,28 @@ class RegisterSpeaker(RegistrationForm):
             'phone',
             'organization',
             'bio',
-            'bio_en',
             'photo',
-            # 'presentation',
             'presentation_title',
-            'presentation_title_en',
             'presentation_summary',
             'presentation_thematic_track',
-            'presentation_post_conference_publication',
+            # 'presentation_post_conference_publication',
             # 'workshop',
             # 'workshop_title',
             # 'workshop_summary',
 
             'agree_mailing',
-            'agree_data',
-            'agree_license'
+            # 'agree_data',
+            'agree_license',
+            'agree_terms',
         ]
 
-    def clean(self):
-        cleaned_data = super(RegisterSpeaker, self).clean()
-        errors = []
-        if not cleaned_data['bio'] and not cleaned_data['bio_en']:
-            errors.append(forms.ValidationError(_('Fill at least one bio!')))
-        if not cleaned_data['presentation_title'] and not cleaned_data['presentation_title_en']:
-            errors.append(forms.ValidationError(_('Fill at least one title!')))
-        if errors:
-            raise forms.ValidationError(errors)
-        return cleaned_data
+
+class RemindForm(ContactForm):
+    form_tag = 'remind-me'
+    save_as_tag = 'remind-me-2017'
+    form_title = u'CopyCamp 2017'
+    notify_on_register = False
+    notify_user = False
 
 
 class NextForm(ContactForm):
@@ -168,74 +308,111 @@ class NextForm(ContactForm):
 
 
 class WorkshopForm(ContactForm):
-    form_tag = 'workshop'
-    save_as_tag = 'workshop-2015'
-    conference_name = u'CopyCamp 2015'
+    form_tag = 'workshops'
+    save_as_tag = 'workshops-2017'
+    conference_name = u'CopyCamp 2017'
     form_title = _('Workshop')
 
     name = forms.CharField(label=_('Name'), max_length=128)
     contact = forms.EmailField(label=_('E-mail'), max_length=128)
     organization = forms.CharField(label=_('Organization'),
                                    max_length=256, required=False)
+    country = forms.CharField(label=_('Country'), max_length=128)
 
-    _#header = HeaderField(label=mark_safe_lazy(_("<h3>I'll take a part in workshops</h3>")), help_text=_('Only workshops with any spots left are visible here.'))
+    _header = HeaderField(
+        label=mark_safe_lazy(_("<h3>I'll take a part in workshops</h3>")),
+        help_text=_('Only workshops with any spots left are visible here.'))
 
-    #_h1 = HeaderField(label=mark_safe_lazy(_("<strong>Thursday, November 6th, 10 a.m.–12 noon</strong>")))
+    _h1 = HeaderField(label=mark_safe_lazy(_("<strong>Thursday, October 27th, 10 a.m.–12 noon</strong>")))
 
-    #w_rysiek = forms.BooleanField(label=_(u'Michał „rysiek” Woźniak, Koalicja Otwartej Edukacji KOED: Wprowadzenie do prawa autorskiego i wolnych licencji'), required=False)
-    #w_bartsch = forms.BooleanField(label=_(u'Natalia Bartsch: Wykorzystywanie istniejących utworów w tworzeniu przedstawienia teatralnego'), required=False)
-    #w_samsung = forms.BooleanField(label=_(u'Rafał Sikorski: Prywatny użytek w prawie autorskim w XXI wieku. Jak powinien wyglądać w\u00a0Unii Europejskiej?'), required=False)
+    w_dimitrov = forms.BooleanField(label=_(u'Dimitar Dimitrov: Hacking Brussels'), required=False)
+    w_vangompel = forms.BooleanField(label=_(
+        u'Stef van Gompel: Methods and constraints for including evidence in IP lawmaking'), required=False)
 
-    #_h2 = HeaderField(label=mark_safe_lazy(_("<strong>Friday, November 7th, 10 a.m.–12 noon</strong>")))
+    _h2 = HeaderField(label=mark_safe_lazy(_("<strong>Friday, October 28th, 10 a.m.–12 noon</strong>")))
 
-    #w_mezei = forms.BooleanField(label=_(u'Péter Mezei: European copyright alternatives – 2014 (Workshop will be held in English)'), required=False)
-    #w_sliwowski = forms.BooleanField(label=_(u'Kamil Śliwowski, Koalicja Otwartej Edukacji KOED: Prawo autorskie w Sieci - ćwiczenia praktyczne'), required=False)
+    w_siewicz = forms.BooleanField(label=_(
+        u'dr Krzysztof Siewicz, dr Marta Hoffman-Sommer: '
+        u'Legal aspects of using research data in the age of Open Data'), required=False)
+    w_siewicz_project = forms.CharField(
+        label=mark_safe(
+            u'<p style="margin-top: 0"><strong>Qualification for this workshop will be based on the answers '
+            u'for the following problem:</strong></p>'
+            u'Please choose a particular dataset from any research project you are involved in and provide '
+            u'a description (no more than 1800 characters). Selected datasets will be discussed during '
+            u'the workshop as case studies. In your description, please include the following information: '
+            u'What is the research goal of the project (in the context of the chosen dataset)? '
+            u'What data is being collected and how is it stored? What is the process of data collection '
+            u'or generation? Who is involved in collecting or producing the data and in what manner?'),
+        max_length=1800, widget=forms.Textarea, required=False)
+    w_google = forms.BooleanField(label=_(
+        u'Marcin Olender, Google: Prawo autorskie na YouTube (workshop in Polish)'), required=False)
 
-    #_h3 = HeaderField(label=mark_safe_lazy(_("<strong>Friday, November 7th, 12 noon–2 p.m.</strong>")))
+    _h3 = HeaderField(label=mark_safe_lazy(_("<strong>Friday, October 28th, 12 noon–2 p.m.</strong>")))
 
-    #w_zaiks = forms.BooleanField(label=_(u'Łukasz Łyczkowski, Adam Pacuski, Stowarzyszenie Autorów ZAiKS: Praktyczne aspekty dozwolonego użytku'), required=False)
-    #w_creativepoland = forms.BooleanField(label=_(u'Paweł Kaźmierczyk i Dagmara Białek, Creative Poland: Sektor kreatywny – pomysły są w cenie'), required=False)
+    w_patronite = forms.BooleanField(label=_(
+        u'Mateusz Górski, Michał Leksiński, Patronite: Jak zarabiać i się nie sprzedać – warsztaty dla twórców '
+        u'(workshop in Polish)'),
+        required=False)
 
-    #_header_1 = HeaderField(label='')
+    w_gurionova = forms.BooleanField(label=_(
+        u'Olga Goriunova: The Lurker and the politics of knowledge in data culture'), required=False)
 
-    # agree_mailing = forms.BooleanField(
-    #    label=_('I am interested in receiving information about the Modern Poland Foundation\'s activities by e-mail'),
-    #    required=False
-    # )
+    _header_1 = HeaderField(label='')
+
+    start_workshops = ('dimitrov', 'vangompel', 'siewicz', 'google', 'patronite', 'gurionova')
+
+    slots = (('_h1', 'dimitrov', 'vangompel'), ('_h2', 'siewicz', 'google'), ('_h3', 'patronite', 'gurionova'))
+
+    agree_mailing = forms.BooleanField(
+        label=_('I am interested in receiving information about the Modern Poland Foundation\'s activities by e-mail'),
+        required=False)
     agree_data = forms.BooleanField(
         label=_('Permission for data processing'),
-        help_text=_(u'I hereby grant Modern Poland Foundation (Fundacja Nowoczesna Polska, ul. Marszałkowska 84/92, 00-514 Warszawa) permission to process my personal data (name, e-mail address) for purposes of registration for CopyCamp conference.')
-    )
+        help_text=_(
+            u'I hereby grant Modern Poland Foundation (Fundacja Nowoczesna Polska, ul. Marszałkowska 84/92, '
+            u'00-514 Warszawa) permission to process my personal data (name, e-mail address) for purposes of '
+            u'registration for CopyCamp conference.'))
     agree_license = forms.BooleanField(
         label=_('Permission for publication'),
-        help_text=_('I agree to having materials, recorded during the conference, released under the terms of <a href="http://creativecommons.org/licenses/by-sa/3.0/deed">CC BY-SA</a> license and to publishing my image.'),
-        required=False
-    )
+        help_text=mark_safe_lazy(_(
+            u'I agree to having materials, recorded during the conference, released under the terms of '
+            u'<a href="http://creativecommons.org/licenses/by-sa/3.0/deed">CC\u00a0BY-SA</a> '
+            u'license and to publishing my image.')),
+        required=False)
 
     def __init__(self, *args, **kwargs):
         super(WorkshopForm, self).__init__(*args, **kwargs)
-        self.limit_reached = Contact.objects.filter(form_tag=self.save_as_tag).count() >= 60
-
-        # counts = {k: 0 for k in self.start_workshops}
-        # for contact in Contact.objects.filter(form_tag=self.save_as_tag):
-        #     for workshop in self.start_workshops:
-    #            if contact.body.get('w_%s' % workshop, False): counts[workshop] += 1
-        # some_full = False
-        # for k, v in counts.items():
-        #     if v >= 60:
-        #         some_full = True
-        #         if 'w_%s' % k in self.fields:
-        #             del self.fields['w_%s' % k]
-        #         if k in self.workshops:
-        #             self.workshops.remove(k)
-        # if not some_full:
-        #     self.fields['_header'].help_text = None
-
-    # def clean(self):
-    #     any_workshop = False
-    #     for w in self.start_workshops:
-    #         if self.cleaned_data.get('w_%s' % w):
-    #             any_workshop = True
-    #     if not any_workshop:
-    #         self._errors['_header'] = [_("Please choose at least one workshop.")]
-    #     return self.cleaned_data
+        # self.limit_reached = Contact.objects.filter(form_tag=self.save_as_tag).count() >= 60
+        try:
+            url = Entry.objects.get(slug_pl='regulamin').get_absolute_url()
+            self.fields['agree_toc'] = forms.BooleanField(
+                required=True,
+                label=mark_safe(_('I accept <a href="%s">Terms and Conditions of CopyCamp</a>') % url)
+            )
+        except Entry.DoesNotExist:
+            pass
+        counts = {k: 0 for k in self.start_workshops}
+        for contact in Contact.objects.filter(form_tag=self.save_as_tag):
+            for workshop in self.start_workshops:
+                if contact.body.get('w_%s' % workshop, False): counts[workshop] += 1
+        some_full = False
+        for k, v in counts.items():
+            if v >= 30:
+                some_full = True
+                if 'w_%s' % k in self.fields:
+                    del self.fields['w_%s' % k]
+                # if k in self.workshops:
+                #     self.workshops.remove(k)
+        if not some_full:
+            self.fields['_header'].help_text = None
+
+    def clean(self):
+        if self.cleaned_data.get('w_siewicz') and not self.cleaned_data.get('w_siewicz_project'):
+            self._errors['w_siewicz_project'] = [_("Please submit your answer to qualify for this workshop")]
+        for slot in self.slots:
+            if sum(1 for w in slot if self.cleaned_data.get('w_%s' % w)) > 1:
+                self._errors[slot[0]] = [_("You can't choose more than one workshop during the same period")]
+        if not any(self.cleaned_data.get('w_%s' % w) for w in self.start_workshops):
+            self._errors['_header'] = [_("Please choose at least one workshop.")]
+        return self.cleaned_data