I found that the "correct" way to address this issue is to use
raw_id_fields.
On Tuesday, 16 June 2015 19:46:51 UTC-7, Dennis Marwood wrote:
>
> Hello,
>
> I want to display images in my manyTomany so that a user can choose what
> images would be included inside of a "BlogWidgetCarousel". The issue I am
> running into is that the render function for the widget returns html via
> the "format_html" and the variable has lost its "safe" setting at that
> point.
>
> In my model I return the choice_label with "mark_safe" but somewhere along
> the way the string is altered and it must be losing that quality. (For the
> example I just changed it to a <b> tag)
>
> I have found the render method and confirmed that I can set the string
> back to a safe state and it works fine.
>
> My questions
>
> 1. Am I just making some kind of mistake when I try to send back the
> string from the model?
> 2. Am I doing something that is unexpected? It seems like this should
> work.
> 3. Would you create a custom widget to solve this issue, if not what
> would you use?
>
>
>
>
> #models.py
> class BlogWidgetCarousel(models.Model):
> entry = models.TextField()
> blog = models.ForeignKey(Blog, blank=True, null=True)
> position = models.PositiveSmallIntegerField("Position")
> images = models.ManyToManyField("Image")
>
> class Meta:
> ordering = ('position', )
>
> def __str__(self):
> return str(self.position)
>
> def save(self, *args, **kwargs):
> self.entry = "<b><i>TODO: create image slider</i></b>"
> super(BlogWidgetCarousel, self).save(*args, **kwargs)
>
> def display(self):
> return self.entry
>
> class Image(models.Model):
> title = models.CharField(max_length=60, blank=False, null=False)
> image = models.ImageField(upload_to="images/")
>
> def thumb(self):
> return '<a href="{0}"><img src="{0}"></a>'.\
> format(MEDIA_URL + str(self.image))
>
> def __str__(self):
> return mark_safe(u'<b>bold</b>')
> __str__.allow_tags = True
>
>
> #admin.py
> class BlogWidgetCarouselInline(admin.StackedInline): #, SortableInline):
> model = BlogWidgetCarousel
> extra = 0
>
> formfield_overrides = {
> models.ManyToManyField: {'widget': CheckboxSelectMultiple},
> }
>
> fieldsets = (
> ("Create Carousel:", {
> 'fields': (("position"), 'images',)
> }),
> ("Result:", {
> 'fields': ('thumb', 'display_as',)
> }),
> )
> readonly_fields = ('display_as', 'thumb',)
>
> def display_as(self, instance):
> return instance.display()
> display_as.allow_tags = True
>
> def thumb(self, instance):
> x = ""
> for i in instance.images.all():
> x += i.thumb()
> return x
> thumb.allow_tags = True
>
> class EntryAdmin(admin.ModelAdmin):
> list_display = ("title", "created")
> prepopulated_fields = {"slug": ("title",)}
> inlines = [
> BlogWidgetTextInline, BlogWidgetCarouselInline,
> ]
>
>
> #dist-packages/django/forms/widgets
> #...
> @html_safe
> @python_2_unicode_compatible
> class ChoiceInput(SubWidget):
> """
> An object used by ChoiceFieldRenderer that represents a single
> <input type='$input_type'>.
> """
> input_type = None # Subclasses must define this
>
> def __init__(self, name, value, attrs, choice, index):
> self.name = name
> self.value = value
> self.attrs = attrs
> self.choice_value = force_text(choice[0])
> self.choice_label = force_text(choice[1])
> self.index = index
> if 'id' in self.attrs:
> self.attrs['id'] += "_%d" % self.index
>
> def __str__(self):
> return self.render()
>
> def render(self, name=None, value=None, attrs=None, choices=()):
> if self.id_for_label:
> label_for = format_html(' for="{}"', self.id_for_label)
> else:
> label_for = ''
> attrs = dict(self.attrs, **attrs) if attrs else self.attrs
> #print self.choice_label <---- Prints "<b>bold</b>" as expected.
> return format_html('<label{}>{} {}</label>', label_for,
> self.tag(attrs), self.choice_label) # choice_label is escaped by format_html
> #return format_html('<label{}>{} {}</label>', label_for,
> self.tag(attrs), mark_safe(self.choice_label)) <---Works
>
>
>
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