2016-10-17 create a normal Django view

Le fichier singers/models.py

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#!/usr/bin/python
# -*- coding: utf8 -*-
"""The singers models.

"""
from __future__ import unicode_literals
from django.utils.encoding import python_2_unicode_compatible

from django.db import models
from django.core.urlresolvers import reverse


@python_2_unicode_compatible
class Person(models.Model):
    """ an actual singular human being """
    name = models.CharField(blank=True, max_length=100)
    email = models.EmailField()

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Group(models.Model):
    """ a music group """
    name = models.CharField(max_length=200,
                            unique=True,
                            help_text="Name of the group")
    members = models.ManyToManyField(Person,
        blank=True,
        help_text="Enter text to search for and add each member of the group.")
    url = models.URLField(blank=True)

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Label(models.Model):
    """ a record label """
    name = models.CharField(max_length=200,
                            unique=True)

    owner = models.ForeignKey(Person,
                              blank=True,
                              null=True)

    url = models.URLField(blank=True)

    def __str__(self):
        return self.name

@python_2_unicode_compatible
class Song(models.Model):
    """ a song """
    title = models.CharField(blank=False, max_length=200)
    group = models.ForeignKey(Group)

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        """
        https://docs.djangoproject.com/en/dev/ref/class-based-views/generic-editing/
        """
        return reverse('singers:song_update',
                       kwargs={'pk': self.pk})


@python_2_unicode_compatible
class Release(models.Model):
    """ a music release/product """
    title = models.CharField(max_length=100)

    catalog = models.CharField(blank=True,
                               max_length=100)

    group = models.ForeignKey(Group, blank=True, null=True,
                              verbose_name="Русский текст (group)")

    label = models.ForeignKey(Label,
                              blank=False,
                              null=False)

    songs = models.ManyToManyField(Song,
                                   blank=True)

    def __str__(self):
        return self.title

@python_2_unicode_compatible
class Author(models.Model):
    """ Author has multiple books,
        via foreign keys
    """
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Book(models.Model):
    """ Book has no admin, its an inline in the Author admin"""

    author = models.ForeignKey(Author)
    title = models.CharField(max_length=100)
    about_group = models.ForeignKey(Group)
    mentions_persons = models.ManyToManyField(Person,
                                              help_text="Person lookup renders html in menu")

    def __str__(self):
        return self.title

Le fichier singers/forms.py

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# -*- coding: utf-8 -*-

from __future__ import unicode_literals

from django.forms.models import ModelForm
from ajax_select import make_ajax_field
from dal import autocomplete

from .models import (Release,
                     Song,
                     Author,
                     Book)

class ReleaseForm(ModelForm):

    class Meta:
        model = Release
        exclude = []

    # args:  this model, fieldname on this model, lookup_channel_name
    group = make_ajax_field(Release, 'group', 'group', show_help_text=True)

    label = make_ajax_field(Release, 'label', 'label', help_text="Search for label by name")

    # any extra kwargs are passed onto the field, so you may pass a custom help_text here
    # songs = make_ajax_field(Release,'songs','song', help_text=u"Search for song by title")

    # testing bug with no help text supplied
    songs = make_ajax_field(Release, 'songs', 'song', help_text="", show_help_text=True)

    # these are from a fixed array defined in lookups.py
    title = make_ajax_field(Release, 'title', 'cliche', help_text="Autocomplete will suggest clichés about cats.")


class SongForm(ModelForm):
    """The Django form"""

    class Meta:
        model = Song
        fields = ['title', 'group']

    # args:  this model, fieldname on this model, lookup_channel_name
    group = make_ajax_field(Song, # this model
                            'group', # fieldname on this model
                            'group', # lookup_channel_name
                            help_text="Select the group")


class AuthorForm(ModelForm):
    class Meta:
        model = Author
        fields = ('name',)
        widgets = {
            'name': autocomplete.Select(url='singers:author_autocomplete')
        }

class BookForm(ModelForm):
    class Meta:
        model = Book
        fields = ('title', 'author',)
        widgets = {
            'author': autocomplete.ModelSelect2(url='singers:author_autocomplete')
        }

Le fichier singers/views.py

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# -*- coding: utf-8 -*-

from __future__ import unicode_literals
from django import forms

from django.shortcuts import render_to_response

# https://docs.djangoproject.com/en/dev/ref/templates/api/
from django.template import RequestContext
from django.http import HttpResponseRedirect

from django.views.generic.edit import UpdateView

from ajax_select.fields import AutoCompleteField

# https://stackoverflow.com/questions/37915224/django-autocomplete-light-widgets-not-showing-up?rq=1
from dal import autocomplete

from .models import (Song,
                     Author,
                     Book)

from .forms import (SongForm,
                    AuthorForm,
                    BookForm)

class SearchForm(forms.Form):

    q = AutoCompleteField('cliche',
        required=True,
        help_text="Autocomplete will suggest clichés about cats, but you can enter anything you like.",
        label="Favorite Cliché",
        attrs={'size': 100})


def search_form(request):

    dd = {}
    if 'q' in request.GET:
        dd['entered'] = request.GET.get('q')
    initial = {'q': "\"This is an initial value,\" said O'Leary."}
    form = SearchForm(initial=initial)
    dd['form'] = form
    return render_to_response('search_form.html',
                              dd,
                              context=RequestContext(request))



class SongUpdate(UpdateView):
    """
            url(r'^singers/song/(?P<pk>\d+)/update/$', SongUpdate.as_view(), name='song_update'),

    Documentation:

    - http://ccbv.co.uk/projects/Django/1.9/django.views.generic.edit/UpdateView/

    """
    model = Song
    form_class = SongForm
    context_object_name = 'song'
    template_name = 'singers/song/update.html'

    def get_object(self, queryset=None):
        """Pour mémoriser self.demande_article"""
        self.object = super(SongUpdate, self).get_object(queryset)
        return self.object

    def post(self, request, *args, **kwargs):
        if "cancel" in request.POST:
            url = self.get_success_url()
            return HttpResponseRedirect(url)
        else:
            return super(SongUpdate, self).post(request, *args, **kwargs)


class AuthorAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        # Don't forget to filter out results depending on the visitor !

        qs = Author.objects.all()

        if self.q:
            qs = qs.filter(name__istartswith=self.q)

        return qs



class AuthorUpdate(UpdateView):
    """
            url(r'^singers/song/(?P<pk>\d+)/update/$', SongUpdate.as_view(), name='song_update'),

    Documentation:

    - http://ccbv.co.uk/projects/Django/1.9/django.views.generic.edit/UpdateView/

    """
    model = Author
    form_class = AuthorForm
    context_object_name = 'author'
    template_name = 'singers/author/update.html'

    def get_object(self, queryset=None):
        """Pour mémoriser self.demande_article"""
        self.object = super(AuthorUpdate, self).get_object(queryset)
        return self.object

    def post(self, request, *args, **kwargs):
        if "cancel" in request.POST:
            url = self.get_success_url()
            return HttpResponseRedirect(url)
        else:
            return super(AuthorUpdate, self).post(request, *args, **kwargs)

class BookUpdate(UpdateView):
    """
            url(r'^singers/song/(?P<pk>\d+)/update/$', SongUpdate.as_view(), name='song_update'),

    Documentation:

    - http://ccbv.co.uk/projects/Django/1.9/django.views.generic.edit/UpdateView/

    """
    model = Book
    form_class = BookForm
    context_object_name = 'author'
    template_name = 'singers/author/update.html'

    def get_object(self, queryset=None):
        """Pour mémoriser self.demande_article"""
        self.object = super(BookUpdate, self).get_object(queryset)
        return self.object

    def post(self, request, *args, **kwargs):
        if "cancel" in request.POST:
            url = self.get_success_url()
            return HttpResponseRedirect(url)
        else:
            return super(BookUpdate, self).post(request, *args, **kwargs)

Le fichier singers/urls.py

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#!/usr/bin/python
# -*- coding: utf8 -*-

from django.conf.urls import url
from  .views import (SongUpdate,
                     BookUpdate,
                     AuthorAutocomplete)


urlpatterns = [
    url(r'^song/(?P<pk>\d+)/update/$', SongUpdate.as_view(), name='song_update'),
    url(r'^book/(?P<pk>\d+)/update/$', BookUpdate.as_view(), name='book_update'),
    url(r'^author_autocomplete/$', AuthorAutocomplete.as_view(), name='author_autocomplete'),
]