bodybuilder

An elasticsearch query body builder. Easily build complex queries for elasticsearch with a simple, predictable api.

Compatibility

Currently aims to support the full elasticsearch query DSL for versions 1.x. The elasticsearch 2.x query DSL is supported by providing a v2 arguments when calling build function.

Contributions are welcome!

Install

npm install bodybuilder --save

Usage

var Bodybuilder = require('bodybuilder')
var body = new Bodybuilder() // A builder instance.
body.query('match', 'message', 'this is a test')
body.build() // Build 1.x DSL
body.build('v2') // Build 2.x DSL

For each elasticsearch query body, create an instance of Bodybuilder, apply the desired query/filter/aggregation clauses, and call build to retrieve the built query body.

REPL

Try it out on the command line using the node repl:

# Start the repl
node repl.js
# The Bodybuilder class is available in the context variable Bodybuilder
bodybuilder > var body = new Bodybuilder()
bodybuilder > body.query('match', 'message', 'this is a test').build()

Queries

body.query(queryType, [arguments])

Creates a query of type queryType. Currently supported query types are listed here.

Arguments

The specific arguments depend on the type of query, but typically follow this pattern:

• queryType - The name of the query, such as 'term' or 'prefix'.
• fieldToQuery - The name of the field in your index to query over.
• searchTerm - The string to search for.

var body = new Bodybuilder().query('match', 'message', 'this is a test').build()
// body == {
//   query: {
//     match: {
//       message: 'this is a test'
//     }
//   }
// }

Filters

body.filter(filterType, [arguments])

Creates a filtered query using filter of type filterType. Currently supported filter types are listed here.

Arguments

The specific arguments depend on the type of filter, but typically follow this pattern:

• filterType - The name of the query, such as 'regexp' or 'exists'.
• fieldToQuery - The name of the field in your index to filter on.
• searchTerm - The string to search for.

var body = new Bodybuilder().filter('term', 'message', 'test').build()
// body == {
//   query: {
//     filtered: {
//       filter: {
//         term: {
//           message: 'test'
//         }
//       }
//     }
//   }
// }

Aggregations

body.aggregation(aggregationType, [arguments])

Creates an aggregation of type aggregationType. Currently supported aggregation types are listed here.

Arguments

The specific arguments depend on the type of aggregation, but typically follow this pattern:

• aggregationType - The name of the aggregation, such as 'sum' or 'terms'.
• fieldToAggregate - The name of the field in your index to aggregate over.
• aggregationName - (optional) A custom name for the aggregation. Defaults to agg_<aggregationType>_<fieldToAggregate>.
• aggregationOptions - (optional) Additional key-value pairs to include in the aggregation object.
• nestingFunction - (optional) A function used to define aggregations as children of the one being created. This must be the last parameter set.

var body = new BodyBuilder().aggregation('terms', 'user').build()
// body == {
//   aggregations: {
//     agg_terms_user: {
//       terms: {
//         field: 'user'
//       }
//     }
//   }
// }

Nested aggregations

To nest aggregations, pass a function as the last parameter in [arguments]. The function receives the recently built aggregation instance and is expected to return an Object which will be assigned to .aggs on the current aggregation. Aggregations in this scope behave like builders and you can call the chainable method .aggregation(aggregationType, [arguments]) on them just as you would on the main BodyBuilder.

var body = new BodyBuilder().aggregation('terms', 'code', null, {
      order: { _term: 'desc' },
      size: 1
    }, agg => agg.aggregation('terms', 'name')).build()
// body == {
//   "aggregations": {
//       "agg_terms_code": {
//           "terms": {
//               "field": "code",
//               "order": {
//                   "_term": "desc"
//               },
//               "size": 1
//           },
//           "aggs": {
//               "agg_terms_name": {
//                   "terms": {
//                       "field": "name"
//                   }
//               }
//           }
//       }
//   }
//}

Combining queries, filters, and aggregations

Multiple queries and filters are merged using the boolean query or filter (see Combining Filters).

var body = new BodyBuilder().query('match', 'message', 'this is a test')
                            .filter('term', 'user', 'kimchy')
                            .filter('term', 'user', 'herald')
                            .orFilter('term', 'user', 'johnny')
                            .notFilter('term', 'user', 'cassie')
                            .aggregation('terms', 'user')
                            .build()

// body == {
//   query: {
//     filtered: {
//       query: {
//         match: {
//           message: 'this is a test'
//         }
//       },
//       filter: {
//         bool: {
//           must: [
//             {term: {user: 'kimchy'}},
//             {term: {user: 'herald'}}
//           ],
//           should: [
//             {term: {user: 'johnny'}}
//           ],
//           must_not: [
//             {term: {user: 'cassie'}}
//           ]
//         }
//       }
//     },
//     aggregations: {
//       agg_terms_user: {
//         terms: {
//           field: 'user'
//         }
//       }
//     }
//   }
// }

Sort

Set a sort direction using sort(field, direction), where direction defaults to ascending.

var body  = new BodyBuilder().filter('term', 'message', 'test')
    .sort('timestamp', 'desc')
    .sort([{
      "channel": {
        "order": "desc"
      }
    }])
    .sort([
      {"categories": "desc"},
      {"content": "asc"}
    ])
    .build()

// body == {
//   sort: [{
//       "timestamp": {
//         "order": "desc"
//       }
//     },
//     {
//       "channel": {
//         "order": "desc"
//       }
//     },
//     {
//       "categories": {
//         "order": "desc"
//       }
//     },
//     {
//       "content": {
//         "order": "asc"
//       }
//     }
//   ],
//   query: {
//     filtered: {
//       filter: {
//         term: {
//           message: 'test'
//         }
//       }
//     }
//   }
// }

From / Size

Set from and size parameters to configure the offset and maximum hits to be returned.

var body = new Bodybuilder().filter('term', 'message', 'test')
                            .size(5)
                            .from(10)
                            .build()
// body == {
//   size: 5,
//   from: 10,
//   query: {
//     filtered: {
//       filter: {
//         term: {
//           message: 'test'
//         }
//       }
//     }
//   }
// }

Other Options

Set any other search request option using rawOption passing in the key-value pair to include in the body.

var body = new Bodybuilder().filter('term', 'message', 'test')
                            .rawOption('_sourceExclude', 'verybigfield')
                            .build()
// body == {
//   _sourceExclude: 'verybigfield',
//   query: {
//     filtered: {
//       filter: {
//         term: {
//           message: 'test'
//         }
//       }
//     }
//   }
// }

Test

Run unit tests:

npm test