Difference between API and flutter/dart Package

[MartinForgetProfessionnal]

Hi! i was first using the API and then realised that there was a package for flutter/dart, so i made the switch, but i noticed some differences and one of them i can't figure how to resolve the problem it causes me.
I use nutrients values per serving, but in some cases the mesurement unit differt from mg to g for exemple... In my first version, working with the API i had no problem because i had the option tto display salt_unit. With the package, the getter is deprecated and it's replaced with typicalUnit which doesn't vary to fit the value per serving that is returned. The thing is that i really don't want to make 2 request to fetch that unic missing information.
So my question is... Can i get that unit (dynamicly) somehow using the package?

[monsieurtanuki]

Hi @MartinForgetProfessionnal!

If needed I can go back to the different comments in closed issues, but I think that the rule is that "salt" is in grams: salt(typicalUnit: Unit.G, offTag: 'salt').
So to answer your question, you can get the unit, it's Nutrient.salt.typicalUnit. Always.
Whatever value you get (and set) should be in grams.
Of course there may be cases where the display is strange: in that case you can convert in your app in milligrams - I'm sure you can do the math for the conversion ;)

With the package, the getter is deprecated

Btw the getter does not exist anymore, since last December I think.

Please keep us posted if you find discrepancies regarding values and units, between the API and dart.

[MartinForgetProfessionnal]

[monsieurtanuki]

To me, that means that:

• for 100g, there is 1.4275 grams of salt
• for a serving, there is .4 grams of salt
• last time someone set the salt value, it was in mg (but we store the value in grams anyway)

If you have a look at 5411188115472 you'll find vitamin B12, that is normally (in the real world) displayed in micrograms:

• "vitamin-b12":3.8e-07 // obviously in grams
• "vitamin-b12_100g":3.8e-07 // obviously in grams
• "vitamin-b12_unit":"µg" // typed in in micrograms, e.g. on the website

[MartinForgetProfessionnal]

Ok, happy to ear it from you.
In resume, if i stick with
UnitHelper.unitToString(Nutrient.(salt, fat, calcium, etc...).typicalUnit),
i'm sure to be ok.

[MartinForgetProfessionnal]

One more question, i really want to do things right. if the unit is returned as mg with the UnitHelper, the value you store is mg rightt? Or i do need to make the conversion (ex: calcium, iron...)

[monsieurtanuki]

If it's a weight, the value is always in grams.
The typicalUnit is a good enough approximation of the nutrient unit (e.g. µg for B12), marginally different from what you read in some product packages.
If you want to display typical unit and a value, you have to convert the value from grams to the typical unit. Same for saving: you save in grams, and should convert from whatever unit the user sees.

[MartinForgetProfessionnal]

Happy i asked that last question, i tought the opposite. Thanks alot! i really really appreciate your time! have a good one.

[MartinForgetProfessionnal]

that is the part that gets me messing me up...

[MartinForgetProfessionnal]

the same is true for some example with sodium. It also diverge in some cases with calcium and iron (% or mg)