collection.ensureIndex is deprecated code example

Example 1: (node:3168) DeprecationWarning: collection.ensureIndex is deprecated. Use createIndexes instead. (Use `node --trace-deprecation ...` to show where the warning was created)

mongoose.set('useCreateIndex', true);

Example 2: collection.ensureIndex is deprecated

mongoose.connect(dbURI, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
    useCreateIndex: true,
    useFindAndModify: true,
})

Example 3: (node:2496) DeprecationWarning: collection.ensureIndex is deprecated. Use createIndexes instead.

/*As of this edit, Mongoose is now at v5.4.13. Per their docs, these are the fixes for the deprecation warnings..*/
mongoose.set('useNewUrlParser', true);
mongoose.set('useFindAndModify', false);
mongoose.set('useCreateIndex', true);

Example 4: (node:2496) DeprecationWarning: collection.ensureIndex is deprecated. Use createIndexes instead.

mongoose.set('useNewUrlParser', true);
mongoose.set('useFindAndModify', false);
mongoose.set('useCreateIndex', true);