Not all data is flat like that which we have been using since Chapter 2, Searching Your Data. Of course if we are building our system, which ElasticSearch will be a part of, we can create a structure that is convenient for ElasticSearch. However, it doesn't need to be flat, it can be more object-oriented. Let's see how to create mappings that use fully structured JSON objects.
Let's assume we have the following data (we store it in the file called structured_data.json):
{
"book" : {
"author" : {
"name" : {
"firstName" : "Fyodor",
"lastName" : "Dostoevsky"
}
},
"isbn" : "123456789",
"englishTitle" : "Crime and Punishment",
"originalTitle" : "Преступлéние и наказáние",
"year" : 1886,
"characters" : [
{
"name" : "Raskolnikov"
},
{
"name" : "Sofia"
}
],
"copies" : 0
}
}As you can see, the data is not flat. It contains arrays and nested objects, so we can't use our mappings that we used previously. But we...