[Wikibase] Quantity property with a unit force item update

[LeMyst]

When you try to add a quantity property to an item in your wikibase instance, with fastrun, like this : wdi_core.WDQuantity(value=size, prop_nr='P46', unit='https://wikibase.url/entity/Q913')

You have multiple issue :

• You need to put the full URI of the unit, otherwise the api.php don't like it and return an error.
• The FastRunContainer can't get the current value of a quantity property, but you can fix this with adding this to the write_required function : elif self.prop_dt_map[prop_nr] == 'quantity': current_value = str(float(current_value[0]))
• The reconstruct_statements function can't parse properly the quantity property and don't add the unit. Actually, this function can only add prop_nr, qualifiers and references. I don't know how to manage this only for the quantity property.

I've mitigated some of these issues, but the last one block me.

In any case, these problems don't stop WikidataIntegrator to work correctly, but these create useless update request to the wikibase api.

[LeMyst]

Created PR #112 with my fixes. You don't need to add the concept_uri to the unit anymore, but you need to pass it via concept_base_uri parameter. WDI will now manage correctly the positive quantity. I don't know how this will work for negative quantity and upper/lower_bound (negative and positive)

I keep the issue open for the moment.

[LeMyst]

Issue fixed in PR #124