CODEWITHSUNDEEP
elasticsearch
eran
eran

Reputation: 15156

searching child-parent in elasticsearch

If I have a child-parent mapping in elastic search. How would I go about searching for parents based on statistics of their children.

Example:

{
  'parent':{
    '_id':{
      'path':'parent_id'
    },
    'properties':{
      'parent_id':{
        'type':'string'
      },
      'name':{
        'type':'string'
      },
      'job':{
        'type':'string'
      },
      'age':{
        'type':'integer'
      },

    }
  }
}{
  'child':{
    '_parent':{
      'type':'parent'
    },
    '_id':{
      'path':'child_id'
    },
    'properties':{
      'child_id':{
        'type':'string'
      },
      'name':{
        'type':'string'
      },
      'favorite_toy':{
        'type':'string'
      },
      'age':{
        'type':'integer'
      },

    }
  }
}

How would I:

  1. get all the parents that have a child named 'bob'?
  2. count all the parents that have a child named 'bob'?
  3. get all the parents that have more than two children?
  4. get all the parents that have 2 children older than 5?

Upvotes: 1

Views: 1278

Answers (1)

imotov
imotov

Reputation: 30163

1) and 2) - you can simply wrap your query into has_child query:

{
  "has_child":{
    "type":"child",
    "query":{
      "match":{
        "name":"bob"
      }
    }
  }
}

3) and 4) - I don't think this is possible at the moment.

Upvotes: 3

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