query.hbs

{
    "query": {
        "multi_match": {
            "fields": [
                "title.substring^3",
                "description.substring",
                "body.substring",
                "title.yomi"
            ],
            "query": "{{query_string}}",
            "type": "most_fields"
        }
    },
    "size": {{default top_hits_size 10}},
    "_source": {
        "include": ["title", "url", "body", "lastModified", "image_url"]
    },
    "highlight": {
        "fragment_size": {{default top_hits_fragment_size 20}},
        "pre_tags" : ["<em>"],
        "post_tags" : ["</em>"],
        "fields": {
            "body": {}
        }
    },
    "aggs": {
        "top_sites": {
            "terms": {
                "field": "{{default collapse_field "url.domain"}}",
                "order": {
                    "top_hit": "desc"
                },
                "size": {{default top_sites_size 3}}
            },
            "aggs": {
                "top_site_hits": {
                    "top_hits": {
                        "_source": {
                            "include": ["title", "url", "body", "lastModified", "image_url"]
                        },
                        "highlight": {
                            "fragment_size": {{default top_sites_fragment_size 12}},
                            "pre_tags" : ["<em>"],
                            "post_tags" : ["</em>"],
                            "fields": {
                                "body": {}
                            }
                        },
                        "size": {{default top_sites_hits_size 2}}
                    }
                },
                "top_hit": {
                    "max": {
                        "script": "doc.score",
                        "lang": "groovy"
                    }
                }
            }
        }
    }
}