In Elasticsearch, there is no dedicated array data type. Any field can contain zero or more values by default, however, all values in the array must be of the same data type. For instance:
an array of strings: [ "one", "two" ]
an array of integers: [ 1, 2 ]
an array of arrays: [ 1, [ 2, 3 ]] which is the equivalent of [ 1, 2, 3 ]
an array of objects: [ { "name": "Mary", "age": 12 }, { "name": "John", "age": 10 }]
NOTE
Arrays of objects
Arrays of objects do not work as you would expect: you cannot query each object independently of the other objects in the array. If you need to be able to do this then you should use the nested data type instead of the object data type.
