add helper that removes non default addresses

[gibkigonzo]

Short description and why it's useful

We can have maximum two addresses. One billing and one shipping. So if someone creates account, add shipping address (default_shipping) and tried to edit it before this fix #3921 then he can't add company address which is billing address ( default_billing). So this change ensure that we don't have any address that is neither billing or shipping address. (which is invalid one, that could be added before PR: 3921).

This is error which we get if there are already two addresses (one shipping and one without any flag).

{"code":500,"result":[{"keyword":"maxItems","dataPath":".customer.addresses","schemaPath":"#/properties/customer/properties/addresses/maxItems","params":{"limit":2},"message":"should NOT have more than 2 items"}]}

Which environment this relates to

Check your case. In case of any doubts please read about Release Cycle

• Test version (https://test.storefrontcloud.io) - this is a new feature or improvement for Vue Storefront. I've created branch from develop branch and want to merge it back to develop
• RC version (https://next.storefrontcloud.io) - this is a stabilisation fix for Release Candidate of Vue Storefront. I've created branch from release branch and want to merge it back to release
• Stable version (https://demo.storefrontcloud.io) - this is an important fix for current stable version. I've created branch from hotfix or master branch and want to merge it back to hotfix

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility and no breaking changes)
• I've updated the Upgrade notes and Changelog on how to port existing VS sites with this new feature

IMPORTANT NOTICE - Remember to update CHANGELOG.md with description of your change

Contribution and currently important rules acceptance

• I read and followed contribution rules

[pkarw]

It would be rather better to support multiple addresses rather than limiting the user just to two :) can we change it?

Reference: https://github.com/aureatelabs/vsf-address-book

[andrzejewsky]

@pkarw this PR probably will be closed as this is something that we discussed with @gibkigonzo - I'll text you on slack about the details.

[gibkigonzo]

Ok, I didn't thought that there can be more addresses (and that there is plugin for that :D ) I will close this and check if previous pr #3921 still allow for more addresses then 2