CouchDB query implementation in Golang for in-memory object querying
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README.md

go-couchdb-query-engine

CouchDB query implementation in Golang for in-memory object querying

Build status: Build Status

Features

  • skip
  • limit
  • selector

Selector

The selector query accepts following couchdb operators:

  • all
  • and
  • elematch
  • eq
  • exists
  • gt
  • gte
  • in
  • lt
  • lte
  • mod
  • ne
  • nin
  • nor
  • not
  • or
  • regex
  • size
  • type

Example code

Data

var TestData = map[string]interface{}{
	"MARBLE1": map[string]interface{}{
		"objectType": "MARBLE",
		"owner":      "bob",
		"size":       3,
		"previousOwners": []string{
			"alice",
			"donald",
		},
		"family": map[string]interface{}{
			"name":   "colored",
			"origin": "spain",
		},
	},
	"MARBLE2": map[string]interface{}{
		"objectType": "MARBLE",
		"owner":      "alice",
		"size":       1,
		"previousOwners": []string{
			"donald",
		},
		"family": map[string]interface{}{
			"name":   "white",
			"origin": "france",
		},
		"verification": []interface{}{
			map[string]interface{}{
				"organizationId": "marbles inspectors inc.",
				"checkedAt":      "2017-12-18T12:11:34.171Z",
				"score":          5,
			},
		},
	},
	"MARBLE3": map[string]interface{}{
		"objectType": "MARBLE",
		"owner":      "arnold",
		"size":       5,
		"previousOwners": []string{
			"alice",
		},
		"family": map[string]interface{}{
			"name":   "striped",
			"origin": "america",
		},
		"verification": []interface{}{
			map[string]interface{}{
				"organizationId": "marbles ID inc.",
				"checkedAt":      "2017-12-18T12:11:34.171Z",
				"score":          3,
			},
			map[string]interface{}{
				"organizationId": "marbles ID inc.",
				"checkedAt":      "2016-12-18T12:11:34.171Z",
				"score":          7,
			},
		},
	},
}

Method

res, err := query.ParseCouchDBQuery(TestData, map[string]interface{}{
			"selector": map[string]interface{}{
				"size": map[string]interface{}{
					"$eq": 3,
				},
			},
		})

Response

StateCouchDBQueryResult{
	StateCouchDBQueryObject{
		Key: "MARBLE0",
		Value: map[string]interface{}{
			"objectType": "MARBLE",
			"owner":      "bob",
			"size":       3,
			"previousOwners": []string{
				"alice",
				"donald",
			},
			"family": map[string]interface{}{
				"name":   "colored",
				"origin": "spain",
			},
		},
	},
}