- Modified privacywrite query with graphLookup:

$graphLookup: {
        from: "projects",
        startWith: "$id_main_project",
        connectFromField: "id_main_project",
        connectToField: "_id",
        as: "ris",
        restrictSearchWithMatch: { $or: [{ privacyread: server_constants.Privacy.all }, { userId: userId }] }
      }
    },
    { $match: { "ris.privacyread": { $exists: true } } },

server/models/todo.js

@@ -55,9 +55,7 @@ var TodoSchema = new mongoose.Schema({
     type: Boolean,
     default: false
   },
-  id_prev: {
-    type: String,
-  },
+  id_prev: mongoose.Schema.Types.ObjectId,
   progress: {
     type: Number,
   },
@@ -148,8 +146,10 @@ TodoSchema.statics.getAllTodo = async function (userId) {
 
   const arrtodos = [];
   if (obj.arrcategories.length > 0) {
-    for (let mycat in obj.arrcategories) {
-      arrtodos.push(tools.mapSort(arralltodo.filter(item => item.category === obj.arrcategories[mycat])))
+    for (const mycat of obj.arrcategories) {
+      const arrfiltrato = arralltodo.filter(item => item.category === mycat);
+      // console.log('arrfiltrato ', mycat, arrfiltrato);
+      arrtodos.push(tools.mapSort(arrfiltrato))
     }
   }