On 6/02/2018 10:27 PM, Julio Biason wrote:
Hi Mike,
One thing that occurs me is that you can override the model save() to
update another field -- one that the user doesn't have access. On that
function, you will write a new field, say `sortable_name` in which
you'll transfor the chemical name into something that will appear in
the proper order, like converting alphas to A, betas to B, etc.
Agreed. This is what I have done to date ...
In substance.save() ...
self.slug = greek_tweak(self.name, allow_unicode=True)
substance.slug is not displayed anywhere and nor is it used in urls
because there can be many substances with the same name. And
greek_tweak() ...
def greek_tweak(name, allow_unicode=True):
name = name.replace('α', 'a').replace('β', 'b').replace('γ', 'g')
name = name.replace('δ', 'd').replace('ε', 'e')
return slugify(name, allow_unicode)
And back in substance Meta ...
ordering = ['slug']
When you request the list of chemicals by name order, you actually use
the `sortable_name` field, which will have all the conversions in place.
On Mon, Feb 5, 2018 at 9:55 PM, Mike Dewhirst <mi...@dewhirst.com.au
<mailto:mi...@dewhirst.com.au>> wrote:
Chemical names start with both upper and lower case as well as
Greek characters. Chemical names also exist in multiple
non-western non-latin languages.
To get lists of chemicals sorting more or less "correctly" I
currently slugify with allow_unicode=True.
This for example gets tert-Butyl... sorted nicely among names
starting with upper-case T.
Unfortunately the α-terpineol or beta this or ε that all sink to
the end of the list instead of sorting into the A, B or Es.
My google-fu indicates I can sort on a property but that is slow.
I have thought about tweaking slugify to include a table of
equivalences between Greek and Western chars but that doesn't
necessarily cater for non-Western character sets. Maybe an ever
expanding table of equivalences?
Thanks for any ideas ...
Mike
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