Implement Source model - Step 1

[jwalgran]

Overview

The first step of a three step process to add a Source model between facility lists and list items, allowing for the submission of individual facilities.

Each step in the process is intended to be released separately and maintain backward compatibility.

Connects #817

Testing Instructions

• Checkout develop and ./scripts/resetdb
• Checkout this branch and ./scripts/migrate
• Ensure that ./scripts/manage liststosources runs without error
• Use ./scripts/manage shell_plus to verify that a Source is created for each FacilityList and that a Source is assigned on each FacilityListItem

>>> list(FacilityList.objects.all().order_by('id').values_list('id', flat=True))
[2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
>>> list(Source.objects.all().order_by('facility_list').values_list('facility_list', flat=True))
[2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
>>> FacilityListItem.objects.filter(source=None).count()
0

Checklist

• fixup! commits have been squashed
• CI passes after rebase
• CHANGELOG.md updated with summary of features or fixes, following Keep a Changelog guidelines

[jwalgran]

This has a migration conflict. Fixing now.

[jwalgran]

Fixed the migration conflict and rebased.

[rajadain]

+1 tested. I don't have a clear sense of the larger design change that this is serving, so can't comment on the context, but this implementation is correct.

[jwalgran]

Thank you for the review.

I don't have a clear sense of the larger design change that this is serving

This is the highest level view of what this set of pulls it trying to achieve.

In order to allow submission of individual facilities we are inserting Source in between Contributor and FacilityListItem rather than FacilitiyList. The FacilityList table becomes a place where we store additional metadata about a Source if the the Source is a list.

#857 is where all of the major work happens. #858 is "cleanup." I will be assigning those for review shortly.

[kellyi]

👍 Ran through the testing instructions and everything worked as described. I did not see any lists without sources.

[jwalgran]

Thanks for the reviews.