Elastic Search - check if array of strings has any string that starts with word "cake"

Question

These are my fields:

      {"brand" : "A",
      "productType" : "food",
      "infoList" : [
        "pizza-34","cake-qaw-34"
      ]},
      {
       "brand" : "B",
      "productType" : "food",
      "infoList" : [
        "pasta-3"
      ]}

I want only those documents to be returned which begin with the word "cake" anywhere in their infoList. In this case, I should get this

{"brand" : "A",
          "productType" : "food",
          "infoList" : [
            "pizza-34","cake-qaw-34"
          ]}

Can someone tell how to achieve this?
PS: Cannot use regexp for this

Answer 1

You can use prefix query to get those documents whose array of strings has any string that starts with the word “cake”

{
  "query": {
    "prefix": {
      "infoList": "cake"
    }
  }
}

Search Result will be

"hits": [
      {
        "_index": "67778291",
        "_type": "_doc",
        "_id": "1",
        "_score": 1.0,
        "_source": {
          "brand": "A",
          "productType": "food",
          "infoList": [
            "pizza-34",
            "cake-qaw-34"
          ]
        }
      }
    ]

Update 1:

{
  "query": {
    "bool": {
      "must_not": {
        "prefix": {
          "infoList": "cake"
        }
      }
    }
  }
}

Search Result will be

"hits": [
      {
        "_index": "67778291",
        "_type": "_doc",
        "_id": "2",
        "_score": 0.0,
        "_source": {
          "brand": "B",
          "productType": "food",
          "infoList": [
            "pasta-3"
          ]
        }
      }
    ]