How to perform a multi level logical query in elasticsearch - elasticsearch

Question

Let's say that we have such query
(a or b or c) and (x or y or z) and (f or g or h) ...
How we can perform such query using Elasticsearch?
I tried the bool query, but I still confused about must, should... clauses and how to place different conditions in these clauses to obtain a logical result
Here is a sample of my data(courses type):
[{
"_index": "training-hub",
"_type": "courses",
"_id": "58ad8090604aff26df131971",
"_score": 1,
"_source": {
"title": "Getting Started with Vue.js",
"description": "In this course, you will learn the basics of Vue.js framework and how to create amazing web applications using this framework",
"slug": "hzrthtrjhyjyt--by--Jemli-Fathi",
"format": [
"Intra-entreprise"
],
"duration": 6,
"language": "EN",
"requirements": [
"Basics of web development"
],
"tags": [],
"audience": [
"Web developers"
],
"price": 600,
"cover": "http://res.cloudinary.com/dqihnnzaj/image/upload/v1487840598/training-hub/k1h0tzciyjflqvtlyr2l.png",
"scheduleUrl": "http://res.cloudinary.com/dqihnnzaj/image/upload/v1487765627/training-hub/sozofm68nrwxhta3ga3u.png",
"trainer": {
"firstname": "Jemli",
"lastname": "Fathi",
"photo": "https://ucarecdn.com/5923a1bb-3e77-47d0-bd5b-7d07b0f559fe/16487460_1269388943138870_3235853817844339449_o.jpg"
},
"courseCategory": {
"name": "Game Development"
},
"createdAt": "2017-02-22T12:14:08.186Z",
"updatedAt": "2017-02-24T10:39:22.896Z"
}
},
{
"_index": "training-hub",
"_type": "courses",
"_id": "58ad81c0604aff26df131973",
"_score": 1,
"_source": {
"title": "Create your first Laravel application today!",
"description": "In this course, you're gonna learn how create fancy web applications using Laravel PHP Framework ...",
"slug": "sdvrehtrthrth--by--Jemli-Fathi",
"format": [
"Intra-entreprise",
"Inter-entreprise"
],
"duration": 6,
"language": "EN",
"requirements": [
"Basics of Web development",
"Basics of PHP language"
],
"tags": [],
"audience": [
"Web developers",
"PHP developers"
],
"price": 600,
"cover": "http://res.cloudinary.com/dqihnnzaj/image/upload/v1487841464/training-hub/dpgqbchualnfc78n69gs.png",
"scheduleUrl": "http://res.cloudinary.com/dqihnnzaj/image/upload/v1487765627/training-hub/sozofm68nrwxhta3ga3u.png",
"trainer": {
"firstname": "Jemli",
"lastname": "Fathi",
"photo": "https://ucarecdn.com/5923a1bb-3e77-47d0-bd5b-7d07b0f559fe/16487460_1269388943138870_3235853817844339449_o.jpg"
},
"courseCategory": {
"name": "Web Development"
},
"createdAt": "2017-02-22T12:19:12.376Z",
"updatedAt": "2017-02-23T09:39:23.414Z"
}
},
{
"_index": "training-hub",
"_type": "courses",
"_id": "58aead4faecfc31e4559d49b",
"_score": 1,
"_source": {
"title": "Getting Started with Docker",
"description": "After taking this course, you will be able to use Docker in real life projects and you can bootstrap your projects into different containers",
"slug": "regrehgreh--by--Jemli-Fathi",
"format": [
"Intra-entreprise"
],
"duration": 5,
"language": "EN",
"requirements": [
"Basic Linux Shell skills",
"Basic knowledge of Linux environment"
],
"tags": [],
"audience": [
"Dev-Ops",
"Web Developers"
],
"price": 999,
"cover": "http://res.cloudinary.com/dqihnnzaj/image/upload/v1487939101/training-hub/vkqupkiqerq0kgjgd0km.png",
"scheduleUrl": "http://res.cloudinary.com/dqihnnzaj/image/upload/v1487842509/training-hub/r9y1qisyfelseeuzgtt3.png",
"trainer": {
"firstname": "Jemli",
"lastname": "Fathi",
"photo": "https://ucarecdn.com/5acb1b5f-b550-4560-b085-2d75384e5ec8/13567067_1064268623650904_3773193220506255422_n.jpg"
},
"courseCategory": {
"name": "Web Development"
},
"createdAt": "2017-02-23T09:37:19.758Z",
"updatedAt": "2017-02-24T12:31:32.078Z"
}
}]
What I need exactly is to filter courses like this:
(category1 or category2 ...) and (format1 or format2...) and
(language1 or language2)...

Answer 1

You may use bool queries combined with the terms query for the desired behavior
GET _search
{
"query" : {
"bool": {
"must": [ //AND
{
"terms": {
"category.name": [ // Category with value VALUE1 or VALUE2
"VALUE1",
"VALUE2"
]
}
},
{
"terms": {
"format": [// format with value FORMAT1 or FORMAT2
"FORMAT1",
"FORMAT2"
]
}
},
{
"terms": {
"language": [// language with value LANG1 or LANG2
"LANG1",
"LANG2"
]
}
}
]
}
}
}
Also, please make sure that the fields that are used for term matching, are not_analyzed.
Please read up on mappings starting here: http://www.elasticsearch.org/guide/reference/mapping/.

Answer 2

Elasticsearch Query String Query does the same what you are looking for.
Look at following code snippet extracted from official docs here
GET /_search
{
"query": {
"query_string": {
"query": "(content:this OR name:this) AND (content:that OR name:that)"
}
}
}
Hope this helps!