Re: SVG widget for the Admin

On 4/06/2021 5:15 pm, Derek wrote:
> Hi Mike
>
> The SVG is not going to display as SVG in a *form* - for that you'd
> need a widget, or perhaps just let users edit the text.

It will always be readonly.  Forever.

>
> Did you try displaying in the normal admin lists? This was my
> understanding of where you wanted to see it and the code snippets I
> posted were for that purpose.

I did try that and it did show the svg image - but that isn't where I
want it. It needs to be in the Admin displayed form.

>
> If you want to see it as "read only" in the form, but shown as SVG,

but shown as an image

> perhaps you need a custom model template
> (https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model)

I think that's where I need to go. Might be easier than a widget -
unless someone has built one already?

It would be quite handy to use mark_safe() somewhere ...

Thanks

Mike

>
> Derek
>
>
> On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:
>
> On 3/06/2021 4:00 pm, Derek wrote:
> > >
> > > 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",
> >     )
> >
>
> The above is unchanged.
>
> # admin
> class ChemicalAdmin(admin.ModelAdmin):
>
>     def _ddstructure(self, obj):
>         return mark_safe(obj.ddstructure)
>     ...
>     fieldsets = (
>         (
>             None,
>             {
>                 "fields": (
>                     "ddstructure",        # displays svg code
>                     "_ddstructure",
>                     ...
>             }
>     ),
>
> FYI it works perfectly as a column in the list display - but I don't
> need it there, rather in the page for the chemical.
>
> This is what happens if it is included in the fieldsets "fields"
> roster.
>
>
> FieldError at /admin/chemical/chemical/17/change/
>
> Unknown field(s) (_ddstructure) specified for Chemical. Check
> fields/fieldsets/exclude attributes of class ChemicalAdmin.
>
> Request Method: GET
> Request URL:
> http://localhost:8088/admin/chemical/chemical/17/change/
> <http://localhost:8088/admin/chemical/chemical/17/change/>
> Django Version: 3.2.3
> Exception Type: FieldError
> Exception Value:
>
> Unknown field(s) (_ddstructure) specified for Chemical. Check
> fields/fieldsets/exclude attributes of class ChemicalAdmin.
>
> Exception Location:
> D:\Users\mike\envs\xxai\lib\site-packages\django\contrib\admin\options.py,
>
> line 712, in get_form
> Python Executable: D:\Users\mike\envs\xxai\Scripts\python.exe
> Python Version: 3.8.3
>
>
> Cheers
>
> Mike
>
>
> > >
> > >     def _the_svg(self):
> > >         return """<svg width="100" height="100">%s</svg>""" %
> > > self.svg_text
> > >         _the_svg.allow_tags = True
> >
>
>
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