Adjust minimum validators on CartLine, OrderLine and FulfillmentLine

[patrick-emmanuel]

I want to merge this change because...
close #2912

Screenshots

Pull Request Checklist

1. Privileged views and APIs are guarded by proper permission checks.
2. All visible strings are translated with proper context.
3. All data-formatting is locale-aware (dates, numbers, and so on).
4. Database queries are optimized and the number of queries is constant.
5. The changes are tested.
6. The code is documented (docstrings, project documentation).
7. GraphQL schema and type definitions are up to date.

[Pacu2]

I think you need to include migrations for those changes.

[codecov]

Codecov Report

Merging #2925 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #2925   +/-   ##
=======================================
  Coverage   89.63%   89.63%           
=======================================
  Files         208      208           
  Lines       10728    10728           
  Branches     1039     1039           
=======================================
  Hits         9616     9616           
  Misses        792      792           
  Partials      320      320

Impacted Files	Coverage Δ
saleor/graphql/core/mutations.py	93.51% <ø> (ø)	⬆️
saleor/checkout/models.py	98.76% <100%> (ø)	⬆️
saleor/order/models.py	95.87% <100%> (ø)	⬆️

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[patrick-emmanuel]

Yeah, that's right.

What do you think about writing tests for models with simple logic like this one?

[Pacu2]

I think we could also remove MaxValueValidator, not sure what they're for? What do you think @maarcingebala ?

[maarcingebala]

@Pacu2 Yeah, I guess we could drop them. Would you mind removing them @the-bionic?

[patrick-emmanuel]

I'll do that right away.

[patrick-emmanuel]

How about dropping the MaxValueValidator on quantity_fulfilled as well?

[Pacu2]

@the-bionic Yes please

[Pacu2]

LGTM, could you please rebase with the latest master? I think we are already on 61st migration in orders

[Pacu2]

Thank you for picking this up!

[patrick-emmanuel]

Glad to be of assistance.