Mongoose model configuration for elasticsearch - elasticsearch

Question

I'm having an issue with mongoosastic in combination with KeystoneJS. I want to search for all the posts of a specific user with a match on the title. I have the following model:
var keystone = require('keystone'),
Types = keystone.Field.Types,
mongoosastic = require('mongoosastic');
User = keystone.list('User');
var Post = new keystone.List('Post');
Post.add({
title: {
type: String,
required: true,
es_indexed: true
},
state: {
type: Types.Select,
options: 'draft, published, archived',
default: 'draft',
es_indexed: true
},
author: {
type: Types.Relationship,
ref: 'User',
es_schema: User,
es_include_in_parent: true,
es_indexed:true
},
publishedDate: {
type: Types.Date,
index: true,
dependsOn: {
state: 'published'
}
},
content: {
extended: {
type: Types.Html,
wysiwyg: true,
height: 400,
es_indexed: true
}
},
});
Post.schema.plugin(mongoosastic, {
hosts: [
process.env.SEARCHBOX_SSL_URL
]
});
Post.defaultColumns = 'title, state|20%, author|20%, publishedDate|20%';
Post.register();
Post.model.createMapping(function(err, mapping) {
if (err) {
console.log('error creating mapping', err);
} else {
console.log('mapping created for Post');
}
});
User.schema.plugin(mongoosastic, {
populate: [
{path: 'author'}
]
});
I tried the approach of "Indexing Mongoose references" (https://github.com/mongoosastic/mongoosastic#indexing-mongoose-references) but I can't get it to work. Elasticsearch is not returning any hits.. My search query:
{
"query": {
"filtered": {
"query": { "match": { "title": "req.query.query" }},
"filter": { "term": { "author": "req.query.userId" }} // or author._id
}
}
}
Can someone provide me the correct Post model configuration & search query? Thanks!