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fixes #1093 – account for no previous revision in backlinks service

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This commit is contained in:
Tom Moor
2019-12-07 11:40:15 -08:00
parent 504aa9f7bb
commit cbd9ff2dd9
2 changed files with 5 additions and 3 deletions
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6
server/services/backlinks.js
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@@ -38,12 +38,14 @@ export default class Backlinks {
const document = await Document.findByPk(event.documentId);
if (!document.publishedAt) return;
const [currentRevision, previsionRevision] = await Revision.findAll({
const [currentRevision, previousRevision] = await Revision.findAll({
where: { documentId: event.documentId },
order: [['createdAt', 'desc']],
limit: 2,
});
const previousLinkIds = parseDocumentIds(previsionRevision.text);
const previousLinkIds = previousRevision
? parseDocumentIds(previousRevision.text)
: [];
const currentLinkIds = parseDocumentIds(currentRevision.text);
const addedLinkIds = difference(currentLinkIds, previousLinkIds);
const removedLinkIds = difference(previousLinkIds, currentLinkIds);