restructured aggregation

src/models/material.ts

@@ -22,5 +22,7 @@ MaterialSchema.query.log = function <Q extends mongoose.DocumentQuery<any, any>>
   db.log(req, this);
   return this;
 }
+MaterialSchema.index({supplier_id: 1});
+MaterialSchema.index({group_id: 1});
 
 export default mongoose.model<any, mongoose.Model<any, any>>('material', MaterialSchema);

src/models/measurement.ts

@@ -17,5 +17,7 @@ MeasurementSchema.query.log = function <Q extends mongoose.DocumentQuery<any, an
   db.log(req, this);
   return this;
 }
+MeasurementSchema.index({sample_id: 1});
+MeasurementSchema.index({measurement_template: 1});
 
 export default mongoose.model<any, mongoose.Model<any, any>>('measurement', MeasurementSchema);

src/models/sample.ts

@@ -22,5 +22,8 @@ SampleSchema.query.log = function <Q extends mongoose.DocumentQuery<any, any>> (
   db.log(req, this);
   return this;
 }
+SampleSchema.index({material_id: 1});
+SampleSchema.index({note_id: 1});
+SampleSchema.index({user_id: 1});
 
 export default mongoose.model<any, mongoose.Model<any, any>>('sample', SampleSchema);