When you say "I tried your suggestion and had no success." what exactly did you try - i.e. what code did you use and what errors did you get?
WRT "Not sure where this should live for the Admin to call it and display the image." - it lives exactly as I showed it in my example; its a user-defined property for the model in which the SVG text is stored. You can use it in the admin as you would the normal model fields. There is a good example of defining and using your own derived 'field' here: https://realpython.com/customize-django-admin-python/#modifying-a-change-list-using-list_display (Please note that to show HTML strings, you need to use the format_html() method. Ignore mt previous reference to "allow_tags" as this is deprecated.) Derek On Wednesday, 2 June 2021 at 10:05:11 UTC+2 Mike Dewhirst wrote: > On 1/06/2021 11:44 pm, Derek wrote: > > You haven't defined where in the admin interface you want this image > > to be displayed? A table? > > > > I have not tried this, but could you not create an additional field on > > your model that returns the HTML-encoding needed to display the SVG? > > Derek, thanks for responding. I tried your suggestion and had no success. > > Where in the admin? Just among a normal roster of fields. The svg is a > molecular structure and the image needs to appear for example just after > the molecular formula. I collect the actual svg code via a public API on > saving the record. > > > > > E.g. > > > > class MyModel(): > > svg_text = CharField() > > in my case it is ... > > class chemical(models.Model): > ... > ddstructure = models.TextField( > null=True, > blank=True, > verbose_name="2D structure", > ) > > > > > def _the_svg(self): > > return """<svg width="100" height="100">%s</svg>""" % > > self.svg_text > > _the_svg.allow_tags = True > > Not sure where this should live for the Admin to call it and display the > image. > > > > I am not sure about editing visually, however - I would expect that > > would require a specialised widget. > > It is read-only in all cases. > > I was thinking a widget might be needed just for display. The svg code > arrives complete with tags so really all it needs is a mechanism to > persuade the admin it is safe to render as is. > > I haven't seen such a (probably insecure) "feature" previously. I've > looked through the docs but haven't found it yet. > > Thanks again > > Mike > > > > > > HTH > > Derek > > > > > > On Tuesday, 1 June 2021 at 03:28:59 UTC+2 Mike Dewhirst wrote: > > > > I collect the svg source for an image from a public API and store > > it in > > a models.TextField. I have no difficulty displaying it in a normal > > view > > and my own template. Nothing special, it just emerges. I don't > > even need > > a 'safe' filter. > > > > However, I really want to display such images in the Admin. At this > > stage all it displays is the svg source. > > > > What is the correct way to make the image appear in the Admin? > > > > Do I need a special field inheriting from TextField? Do I need a > > special > > widget? Is there a way to mark admin field values as safe? > > > > Thanks for any hints > > > > Mike > > > > -- > > Signed email is an absolute defence against phishing. This email has > > been signed with my private key. If you import my public key you can > > automatically decrypt my signature and be sure it came from me. Just > > ask and I'll send it to you. Your email software can handle signing. > > > > > > -- > > You received this message because you are subscribed to the Google > > Groups "Django users" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to django-users...@googlegroups.com > > <mailto:django-users...@googlegroups.com>. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com > > > < > https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com?utm_medium=email&utm_source=footer > >. > > > -- > Signed email is an absolute defence against phishing. This email has > been signed with my private key. If you import my public key you can > automatically decrypt my signature and be sure it came from me. Just > ask and I'll send it to you. Your email software can handle signing. > > > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/518a9b56-de5a-46b8-8578-89bd99f20f4fn%40googlegroups.com.
