Commit With Frontend and Backend in MERN

backend/node_modules/mongoose/lib/helpers/populate/setPopulatedVirtualValue.js

@@ -0,0 +1,33 @@
+'use strict';
+
+/**
+ * Set a populated virtual value on a document's `$$populatedVirtuals` value
+ *
+ * @param {*} populatedVirtuals A document's `$$populatedVirtuals`
+ * @param {*} name The virtual name
+ * @param {*} v The result of the populate query
+ * @param {*} options The populate options. This function handles `justOne` and `count` options.
+ * @returns {Array<Document>|Document|Object|Array<Object>} the populated virtual value that was set
+ */
+
+module.exports = function setPopulatedVirtualValue(populatedVirtuals, name, v, options) {
+  if (options.justOne || options.count) {
+    populatedVirtuals[name] = Array.isArray(v) ?
+      v[0] :
+      v;
+
+    if (typeof populatedVirtuals[name] !== 'object') {
+      populatedVirtuals[name] = options.count ? v : null;
+    }
+  } else {
+    populatedVirtuals[name] = Array.isArray(v) ?
+      v :
+      v == null ? [] : [v];
+
+    populatedVirtuals[name] = populatedVirtuals[name].filter(function(doc) {
+      return doc && typeof doc === 'object';
+    });
+  }
+
+  return populatedVirtuals[name];
+};