fix(populate): handle nested array foreignField with virtual populate

Fix #7374
Automattic · Jan 17, 2019 · f424fe4 · f424fe4
1 parent be881e7
commit f424fe4
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/lib/model.js b/lib/model.js
@@ -3863,6 +3863,7 @@ function populate(model, docs, options, callback) {
       for (const foreignField of mod.foreignField) {
         _val = utils.getValue(foreignField, val);
         if (Array.isArray(_val)) {
+          _val = utils.array.flatten(_val);
           const _valLength = _val.length;
           for (let j = 0; j < _valLength; ++j) {
             let __val = _val[j];

diff --git a/test/model.populate.test.js b/test/model.populate.test.js
@@ -8066,12 +8066,12 @@ describe('model: populate:', function() {
     const Artist = db.model('gh7374_Artist', artistSchema);
 
     return co(function*() {
-      const artists = yield Artist.create([
+      yield Artist.create([
         { _id: 1, name: 'Axl Rose' },
         { _id: 2, name: 'Slash' }
       ]);
 
-      const song = yield Song.create({
+      yield Song.create({
         title: 'November Rain',
         identifiers: [{ artists: [{ artist: 1 }, { artist: 2 }] }]
       });