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Show points of inconsistency in error message #11

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Show points of inconsistency in error message #11

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15 changes: 13 additions & 2 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,8 +20,19 @@ export default async function({

const latest = migrations[migrations.length - 1]

if (latest.migration_id !== migrations.length)
throw new Error('Inconsistency in migration numbering')
if (latest.migration_id !== migrations.length) {
let numbers = []

for (const [i, m] of migrations.entries()) {
if (i === 0 || i + 1 === migrations.length)
continue

if (m.migration_id + 1 !== migrations[i + 1].migration_id)
numbers.push(m.migration_id)
}

throw new Error('Inconsistency in migration numbering at: ' + numbers.map(x => x).join(', '))
}

await ensureMigrationsTable()

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