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109 lines
3.9 KiB
Markdown
109 lines
3.9 KiB
Markdown
# Normalized Versions Query Guide
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This guide complements the Sprint 1–2 normalized versions rollout. It documents recommended indexes and aggregation patterns for querying `AffectedPackage.normalizedVersions`.
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For a field-by-field look at how normalized rules persist in MongoDB (including provenance metadata), see Section 8 of the [Feedser SemVer Merge Playbook](merge_semver_playbook.md).
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## 1. Recommended indexes
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When `feedser.storage.enableSemVerStyle` is enabled, advisories expose a flattened
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`normalizedVersions` array at the document root. Create these indexes in `mongosh`
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after the migration completes (adjust collection name if you use a prefix):
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```javascript
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db.advisories.createIndex(
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{
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"normalizedVersions.packageId": 1,
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"normalizedVersions.scheme": 1,
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"normalizedVersions.type": 1
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},
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{ name: "advisory_normalizedVersions_pkg_scheme_type" }
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);
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db.advisories.createIndex(
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{ "normalizedVersions.value": 1 },
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{ name: "advisory_normalizedVersions_value", sparse: true }
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);
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```
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- The compound index accelerates `$match` stages that filter by package identifier and rule style without unwinding `affectedPackages`.
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- The sparse index keeps storage costs low while supporting pure exact-version lookups (type `exact`).
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The storage bootstrapper creates the same indexes automatically when the feature flag is enabled.
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## 2. Query patterns
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### 2.1 Determine if a specific version is affected
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```javascript
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db.advisories.aggregate([
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{ $match: { "normalizedVersions.packageId": "pkg:npm/lodash" } },
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{ $unwind: "$normalizedVersions" },
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{ $match: {
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$or: [
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{ "normalizedVersions.type": "exact",
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"normalizedVersions.value": "4.17.21" },
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{ "normalizedVersions.type": "range",
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"normalizedVersions.min": { $lte: "4.17.21" },
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"normalizedVersions.max": { $gt: "4.17.21" } },
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{ "normalizedVersions.type": "gte",
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"normalizedVersions.min": { $lte: "4.17.21" } },
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{ "normalizedVersions.type": "lte",
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"normalizedVersions.max": { $gte: "4.17.21" } }
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]
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}},
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{ $project: { advisoryKey: 1, title: 1, "normalizedVersions.packageId": 1 } }
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]);
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```
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Use this pipeline during Sprint 2 staging validation runs. Invoke `explain("executionStats")` to confirm the compound index is selected.
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### 2.2 Locate advisories missing normalized rules
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```javascript
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db.advisories.aggregate([
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{ $match: { $or: [
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{ "normalizedVersions": { $exists: false } },
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{ "normalizedVersions": { $size: 0 } }
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] } },
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{ $project: { advisoryKey: 1, affectedPackages: 1 } }
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]);
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```
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Run this query after backfill jobs to identify gaps that still rely solely on `rangeExpression`.
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### 2.3 Deduplicate overlapping rules
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```javascript
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db.advisories.aggregate([
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{ $unwind: "$normalizedVersions" },
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{ $group: {
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_id: {
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identifier: "$normalizedVersions.packageId",
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scheme: "$normalizedVersions.scheme",
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type: "$normalizedVersions.type",
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min: "$normalizedVersions.min",
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minInclusive: "$normalizedVersions.minInclusive",
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max: "$normalizedVersions.max",
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maxInclusive: "$normalizedVersions.maxInclusive",
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value: "$normalizedVersions.value"
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},
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advisories: { $addToSet: "$advisoryKey" },
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notes: { $addToSet: "$normalizedVersions.notes" }
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}},
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{ $match: { "advisories.1": { $exists: true } } },
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{ $sort: { "_id.identifier": 1, "_id.type": 1 } }
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]);
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```
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Use this to confirm the merge dedupe logic keeps only one normalized rule per unique constraint.
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## 3. Operational checklist
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- [ ] Create the indexes in staging before toggling dual-write in production.
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- [ ] Capture explain plans and attach them to the release notes.
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- [ ] Notify downstream services that consume advisory snapshots about the new `normalizedVersions` array.
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- [ ] Update export fixtures once dedupe verification passes.
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Additional background and mapper examples live in [Feedser SemVer Merge Playbook](merge_semver_playbook.md).
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