Example Warning:
(node:73172) DeprecationWarning: collection.ensureIndex is deprecated. Use createIndexes instead. (Use `node --trace-deprecation ...` to show where the warning was created)
How to fix this problem ?
Add useCreateIndex:true to your options
mongoose.connect('mongodb://127.0.0.1:27017/test', {
useNewUrlParser: true,
useUnifiedTopology: true,
useCreateIndex:true
})
