Features: Filter Aggregations, Nested Aggregations, Multi Match Queries, Highlights (#12)

* Add support for multi_match queries

* Add support for highlights

* Add support for nested aggregations and filtered aggregations

* Update README

* Fix formatting

README.md

@@ -124,6 +124,7 @@ The following queries are currently supported:
 | `"match_phrase_prefix"` | `MatchPhrasePrefix()` |
 | `"match_all"`           | `MatchAll()`          |
 | `"match_none"`          | `MatchNone()`         |
+| `"multi_match"`         | `MultiMatch()`        |
 | `"exists"`              | `Exists()`            |
 | `"fuzzy"`               | `Fuzzy()`             |
 | `"ids"`                 | `IDs()`               |
@@ -158,6 +159,23 @@ The following aggregations are currently supported:
 | `"top_hits"`            | `TopHits()`           |
 | `"terms"`               | `TermsAgg()`          |
 
+### Supported Top Level Options
+
+The following top level options are currently supported:
+
+| ElasticSearch DSL       | `esquery.Search` Function              |
+| ------------------------|--------------------------------------- |
+| `"highlight"`           | `Highlight()`                          |
+| `"explain"`             | `Explain()`                            |
+| `"from"`                | `From()`                               |
+| `"postFilter"`          | `PostFilter()`                         |
+| `"query"`               | `Query()`                              |
+| `"aggs"`                | `Aggs()`                               |
+| `"size"`                | `Size()`                               |
+| `"sort"`                | `Sort()`                               |
+| `"source"`              | `SourceIncludes(), SourceExcludes()`   |
+| `"timeout"`             | `Timeout()`                            |
+
 #### Custom Queries and Aggregations
 
 To execute an arbitrary query or aggregation (including those not yet supported by the library), use the `CustomQuery()` or `CustomAgg()` functions, respectively. Both accept any `map[string]interface{}` value.

aggregations_test.go

@@ -58,5 +58,39 @@ func TestAggregations(t *testing.T) {
 				},
 			},
 		},
+		{
+			"a complex, multi-aggregation, nested",
+			Aggregate(
+				NestedAgg("categories","categories").
+				Aggs(TermsAgg("type","outdoors")),
+				FilterAgg("filtered",
+					Term("type", "t-shirt")),
+			),
+			map[string]interface{}{
+				"aggs": map[string]interface{}{
+					"categories": map[string]interface{}{
+						"nested": map[string]interface{}{
+							"path": "categories",
+						},
+						"aggs": map[string]interface{} {
+							"type": map[string]interface{} {
+								"terms": map[string]interface{} {
+									"field": "outdoors",
+								},
+							},
+						},
+					},
+					"filtered": map[string]interface{}{
+						"filter": map[string]interface{}{
+							"term": map[string]interface{}{
+								"type":   map[string]interface{} {
+									"value": "t-shirt",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
 	})
 }

aggs_filter.go

@@ -0,0 +1,49 @@
+package esquery
+
+type FilterAggregation struct {
+	name   string
+	filter Mappable
+	aggs   []Aggregation
+}
+
+// Filter creates a new aggregation of type "filter". The method name includes
+// the "Agg" suffix to prevent conflict with the "filter" query.
+func FilterAgg(name string, filter Mappable) *FilterAggregation {
+	return &FilterAggregation{
+		name:   name,
+		filter: filter,
+	}
+}
+
+// Name returns the name of the aggregation.
+func (agg *FilterAggregation) Name() string {
+	return agg.name
+}
+
+// Filter sets the filter items
+func (agg *FilterAggregation) Filter(filter Mappable) *FilterAggregation {
+	agg.filter = filter
+	return agg
+}
+
+// Aggs sets sub-aggregations for the aggregation.
+func (agg *FilterAggregation) Aggs(aggs ...Aggregation) *FilterAggregation {
+	agg.aggs = aggs
+	return agg
+}
+
+func (agg *FilterAggregation) Map() map[string]interface{} {
+	outerMap := map[string]interface{}{
+		"filter": agg.filter.Map(),
+	}
+
+	if len(agg.aggs) > 0 {
+		subAggs := make(map[string]map[string]interface{})
+		for _, sub := range agg.aggs {
+			subAggs[sub.Name()] = sub.Map()
+		}
+		outerMap["aggs"] = subAggs
+	}
+
+	return outerMap
+}

aggs_filter_test.go

@@ -0,0 +1,42 @@
+package esquery
+
+import "testing"
+
+func TestFilterAggs(t *testing.T) {
+	runMapTests(t, []mapTest{
+		{
+			"filter agg: simple",
+			FilterAgg("filtered", Term("type", "t-shirt")),
+			map[string]interface{}{
+				"filter": map[string]interface{}{
+					"term": map[string]interface{}{
+						"type": map[string]interface{}{
+							"value": "t-shirt",
+						},
+					},
+				},
+			},
+		},
+		{
+			"filter agg: with aggs",
+			FilterAgg("filtered", Term("type", "t-shirt")).
+				Aggs(Avg("avg_price", "price")),
+			map[string]interface{}{
+				"filter": map[string]interface{}{
+					"term": map[string]interface{}{
+						"type": map[string]interface{}{
+							"value": "t-shirt",
+						},
+					},
+				},
+				"aggs": map[string]interface{}{
+					"avg_price": map[string]interface{}{
+						"avg": map[string]interface{}{
+							"field": "price",
+						},
+					},
+				},
+			},
+		},
+	})
+}

aggs_nested.go

@@ -0,0 +1,53 @@
+package esquery
+
+type NestedAggregation struct {
+	name string
+	path string
+	aggs []Aggregation
+}
+
+// NestedAgg creates a new aggregation of type "nested". The method name includes
+// the "Agg" suffix to prevent conflict with the "nested" query.
+func NestedAgg(name string, path string) *NestedAggregation {
+	return &NestedAggregation{
+		name: name,
+		path: path,
+	}
+}
+
+// Name returns the name of the aggregation.
+func (agg *NestedAggregation) Name() string {
+	return agg.name
+}
+
+// NumberOfFragments sets the aggregations path
+func (agg *NestedAggregation) Path(p string) *NestedAggregation {
+	agg.path = p
+	return agg
+}
+
+// Aggs sets sub-aggregations for the aggregation.
+func (agg *NestedAggregation) Aggs(aggs ...Aggregation) *NestedAggregation {
+	agg.aggs = aggs
+	return agg
+}
+
+func (agg *NestedAggregation) Map() map[string]interface{} {
+	innerMap := map[string]interface{}{
+		"path": agg.path,
+	}
+
+	outerMap := map[string]interface{}{
+		"nested": innerMap,
+	}
+
+	if len(agg.aggs) > 0 {
+		subAggs := make(map[string]map[string]interface{})
+		for _, sub := range agg.aggs {
+			subAggs[sub.Name()] = sub.Map()
+		}
+		outerMap["aggs"] = subAggs
+	}
+
+	return outerMap
+}

aggs_nested_test.go

@@ -0,0 +1,34 @@
+package esquery
+
+import "testing"
+
+func TestNestedAggs(t *testing.T) {
+	runMapTests(t, []mapTest{
+		{
+			"nested agg: simple",
+			NestedAgg("simple", "categories"),
+			map[string]interface{}{
+				"nested": map[string]interface{}{
+					"path": "categories",
+				},
+			},
+		},
+		{
+			"nested agg: with aggs",
+			NestedAgg("more_nested", "authors").
+				Aggs(TermsAgg("authors", "name")),
+			map[string]interface{}{
+				"nested": map[string]interface{}{
+					"path": "authors",
+				},
+				"aggs": map[string]interface{}{
+					"authors": map[string]interface{}{
+						"terms": map[string]interface{}{
+							"field": "name",
+						},
+					},
+				},
+			},
+		},
+	})
+}

highlight.go

@@ -0,0 +1,341 @@
+package esquery
+
+import (
+	"github.com/fatih/structs"
+)
+
+// Map returns a map representation of the highlight; implementing the
+// Mappable interface.
+func (q *QueryHighlight) Map() map[string]interface{} {
+	results := structs.Map(q.params)
+	if q.highlightQuery != nil {
+		results["query"] = q.highlightQuery.Map()
+	}
+	if q.fields != nil && len(q.fields) > 0 {
+		fields := make(map[string]interface{})
+		for k, v := range q.fields {
+			fields[k] = v.Map()
+		}
+		results["fields"] = fields
+	}
+	return results
+}
+
+type QueryHighlight struct {
+	highlightQuery Mappable                   `structs:"highlight_query,omitempty"`
+	fields         map[string]*QueryHighlight `structs:"fields"`
+	params         highlighParams
+}
+
+type highlighParams struct {
+	PreTags  []string `structs:"pre_tags,omitempty"`
+	PostTags []string `structs:"post_tags,omitempty"`
+
+	FragmentSize          uint16                   `structs:"fragment_size,omitempty"`
+	NumberOfFragments     uint16                   `structs:"number_of_fragments,omitempty"`
+	Type                  HighlightType            `structs:"type,string,omitempty"`
+	BoundaryChars         string                   `structs:"boundary_chars,omitempty"`
+	BoundaryMaxScan       uint16                   `structs:"boundary_max_scan,omitempty"`
+	BoundaryScanner       HighlightBoundaryScanner `structs:"boundary_scanner,string,omitempty"`
+	BoundaryScannerLocale string                   `structs:"boundary_scanner_locale,omitempty"`
+	Encoder               HighlightEncoder         `structs:"encoder,string,omitempty"`
+	ForceSource           *bool                    `structs:"force_source,omitempty"`
+	Fragmenter            HighlightFragmenter      `structs:"fragmenter,string,omitempty"`
+	FragmentOffset        uint16                   `structs:"fragment_offset,omitempty"`
+	MatchedFields         []string                 `structs:"matched_fields,omitempty"`
+	NoMatchSize           uint16                   `structs:"no_match_size,omitempty"`
+	Order                 HighlightOrder           `structs:"order,string,omitempty"`
+	PhraseLimit           uint16                   `structs:"phrase_limit,omitempty"`
+	RequireFieldMatch     *bool                    `structs:"require_field_match,omitempty"`
+	TagsSchema            HighlightTagsSchema      `structs:"tags_schema,string,omitempty"`
+}
+
+// Highlight creates a new "query" of type "highlight"
+func Highlight() *QueryHighlight {
+	return newHighlight()
+}
+
+func newHighlight() *QueryHighlight {
+	return &QueryHighlight{
+		fields: make(map[string]*QueryHighlight),
+		params: highlighParams{},
+	}
+}
+
+// PreTags sets the highlight query's pre_tags ignore unmapped field
+func (q *QueryHighlight) PreTags(s ...string) *QueryHighlight {
+	q.params.PreTags = append(q.params.PreTags, s...)
+	return q
+}
+
+// PostTags sets the highlight query's post_tags ignore unmapped field
+func (q *QueryHighlight) PostTags(s ...string) *QueryHighlight {
+	q.params.PostTags = append(q.params.PostTags, s...)
+	return q
+}
+
+// Field sets an entry the highlight query's fields
+func (q *QueryHighlight) Field(name string, h ...*QueryHighlight) *QueryHighlight {
+	var fld *QueryHighlight
+	if len(h) > 0 {
+		fld = h[len(h)-1]
+	} else {
+		fld = &QueryHighlight{}
+	}
+	q.fields[name] = fld
+	return q
+}
+
+// Fields sets all entries for the highlight query's fields
+func (q *QueryHighlight) Fields(h map[string]*QueryHighlight) *QueryHighlight {
+	q.fields = h
+	return q
+}
+
+// FragmentSize sets the highlight query's fragment_size ignore unmapped field
+func (q *QueryHighlight) FragmentSize(i uint16) *QueryHighlight {
+	q.params.FragmentSize = i
+	return q
+}
+
+// NumberOfFragments sets the highlight query's number_of_fragments ignore unmapped field
+func (q *QueryHighlight) NumberOfFragments(i uint16) *QueryHighlight {
+	q.params.NumberOfFragments = i
+	return q
+}
+
+// Type sets the highlight query's type ignore unmapped field
+func (q *QueryHighlight) Type(t HighlightType) *QueryHighlight {
+	q.params.Type = t
+	return q
+}
+
+// BoundaryChars sets the highlight query's boundary_chars ignore unmapped field
+func (q *QueryHighlight) BoundaryChars(s string) *QueryHighlight {
+	q.params.BoundaryChars = s
+	return q
+}
+
+// BoundaryMaxScan sets the highlight query's boundary_max_scan ignore unmapped field
+func (q *QueryHighlight) BoundaryMaxScan(i uint16) *QueryHighlight {
+	q.params.BoundaryMaxScan = i
+	return q
+}
+
+// BoundaryScanner sets the highlight query's boundary_scanner ignore unmapped field
+func (q *QueryHighlight) BoundaryScanner(t HighlightBoundaryScanner) *QueryHighlight {
+	q.params.BoundaryScanner = t
+	return q
+}
+
+// BoundaryScannerLocale sets the highlight query's boundary_scanner_locale ignore unmapped field
+func (q *QueryHighlight) BoundaryScannerLocale(l string) *QueryHighlight {
+	q.params.BoundaryScannerLocale = l
+	return q
+}
+
+// Encoder sets the highlight query's encoder ignore unmapped field
+func (q *QueryHighlight) Encoder(e HighlightEncoder) *QueryHighlight {
+	q.params.Encoder = e
+	return q
+}
+
+// ForceSource sets the highlight query's force_source ignore unmapped field
+func (q *QueryHighlight) ForceSource(b bool) *QueryHighlight {
+	q.params.ForceSource = &b
+	return q
+}
+
+// Fragmenter sets the highlight query's fragmenter ignore unmapped field
+func (q *QueryHighlight) Fragmenter(f HighlightFragmenter) *QueryHighlight {
+	q.params.Fragmenter = f
+	return q
+}
+
+// FragmentOffset sets the highlight query's fragment_offset ignore unmapped field
+func (q *QueryHighlight) FragmentOffset(i uint16) *QueryHighlight {
+	q.params.FragmentOffset = i
+	return q
+}
+
+// HighlightQuery sets the highlight query's highlight_query ignore unmapped field
+func (q *QueryHighlight) HighlightQuery(b Mappable) *QueryHighlight {
+	q.highlightQuery = b
+	return q
+}
+
+// MatchedFields sets the highlight query's matched_fields ignore unmapped field
+func (q *QueryHighlight) MatchedFields(s ...string) *QueryHighlight {
+	q.params.MatchedFields = append(q.params.MatchedFields, s...)
+	return q
+}
+
+// NoMatchSize sets the highlight query's no_match_size ignore unmapped field
+func (q *QueryHighlight) NoMatchSize(i uint16) *QueryHighlight {
+	q.params.NoMatchSize = i
+	return q
+}
+
+// Order sets the nested highlight's score order unmapped field
+func (q *QueryHighlight) Order(o HighlightOrder) *QueryHighlight {
+	q.params.Order = o
+	return q
+}
+
+// PhraseLimit sets the highlight query's phrase_limit ignore unmapped field
+func (q *QueryHighlight) PhraseLimit(i uint16) *QueryHighlight {
+	q.params.PhraseLimit = i
+	return q
+}
+
+// RequireFieldMatch sets the highlight query's require_field_match ignore unmapped field
+func (q *QueryHighlight) RequireFieldMatch(b bool) *QueryHighlight {
+	q.params.RequireFieldMatch = &b
+	return q
+}
+
+// TagsSchema sets the highlight query's tags_schema ignore unmapped field
+func (q *QueryHighlight) TagsSchema(s HighlightTagsSchema) *QueryHighlight {
+	q.params.TagsSchema = s
+	return q
+}
+
+type HighlightType uint8
+
+const (
+	// HighlighterUnified is the "unified" value
+	HighlighterUnified HighlightType = iota
+
+	// HighlighterPlain is the "plain" value
+	HighlighterPlain
+
+	// HighlighterFvh is the "fvh" value
+	HighlighterFvh
+)
+
+// String returns a string representation of the type parameter, as
+// known to ElasticSearch.
+func (a HighlightType) String() string {
+	switch a {
+	case HighlighterUnified:
+		return "unified"
+	case HighlighterPlain:
+		return "plain"
+	case HighlighterFvh:
+		return "fvh"
+	}
+	return ""
+}
+
+type HighlightBoundaryScanner uint8
+
+const (
+	BoundaryScannerDefault HighlightBoundaryScanner = iota
+
+	// BoundaryScannerChars is the "chars" value
+	BoundaryScannerChars
+
+	// BoundaryScannerSentence is the "sentence" value
+	BoundaryScannerSentence
+
+	// BoundaryScannerWord is the "word" value
+	BoundaryScannerWord
+)
+
+// String returns a string representation of the boundary_scanner parameter, as
+// known to ElasticSearch.
+func (a HighlightBoundaryScanner) String() string {
+	switch a {
+	case BoundaryScannerChars:
+		return "chars"
+	case BoundaryScannerSentence:
+		return "sentence"
+	case BoundaryScannerWord:
+		return "word"
+	}
+	return ""
+}
+
+type HighlightEncoder uint8
+
+const (
+	// EncoderDefault is the "default" value
+	EncoderDefault HighlightEncoder = iota
+
+	// EncoderHtml is the "html" value
+	EncoderHtml
+)
+
+// String returns a string representation of the encoder parameter, as
+// known to ElasticSearch.
+func (a HighlightEncoder) String() string {
+	switch a {
+	case EncoderDefault:
+		return "default"
+	case EncoderHtml:
+		return "html"
+	}
+	return ""
+}
+
+type HighlightFragmenter uint8
+
+const (
+	// FragmentSpan is the "span" value
+	FragmenterSpan HighlightFragmenter = iota
+
+	// FragmenterSimple is the "simple" value
+	FragmenterSimple
+)
+
+// String returns a string representation of the fragmenter parameter, as
+// known to ElasticSearch.
+func (a HighlightFragmenter) String() string {
+	switch a {
+	case FragmenterSpan:
+		return "span"
+	case FragmenterSimple:
+		return "simple"
+	}
+	return ""
+}
+
+type HighlightOrder uint8
+
+const (
+	// OrderNone is the "none" value
+	OrderNone HighlightOrder = iota
+
+	// OrderScore is the "score" value
+	OrderScore
+)
+
+// String returns a string representation of the order parameter, as
+// known to ElasticSearch.
+func (a HighlightOrder) String() string {
+	switch a {
+	case OrderNone:
+		return "none"
+	case OrderScore:
+		return "score"
+	}
+	return ""
+}
+
+type HighlightTagsSchema uint8
+
+const (
+	TagsSchemaDefault HighlightTagsSchema = iota
+	// TagsSchemaStyled is the "styled" value
+	TagsSchemaStyled
+)
+
+// String returns a string representation of the tags_schema parameter, as
+// known to ElasticSearch.
+func (a HighlightTagsSchema) String() string {
+	switch a {
+	case TagsSchemaStyled:
+		return "styled"
+	}
+	return ""
+}

highlight_test.go

@@ -0,0 +1,93 @@
+package esquery
+
+import (
+	"testing"
+)
+
+func TestHighlight(t *testing.T) {
+	runMapTests(t, []mapTest{
+		{
+			"simple highlight",
+			Highlight().Field("content"),
+			map[string]interface{}{
+				"fields": map[string]interface{}{
+					"content": map[string]interface{}{},
+				},
+			},
+		},
+		{
+			"highlight all params",
+			Highlight().
+				PreTags("<pre>", "<code>").
+				PostTags("</code>", "</pre>").
+				Field("content",
+					Highlight().
+						BoundaryChars(".;,")).
+				FragmentSize(150).
+				NumberOfFragments(4).
+				Type(HighlighterPlain).
+				BoundaryChars("()[]").
+				BoundaryMaxScan(32).
+				BoundaryScanner(BoundaryScannerChars).
+				BoundaryScannerLocale("en-US").
+				Encoder(EncoderHtml).
+				ForceSource(true).
+				Fragmenter(FragmenterSimple).
+				FragmentOffset(6).
+				HighlightQuery(
+					Bool().
+						Must(
+							Match("author").
+								Query("some guy").
+								Analyzer("analyzer?").
+								Fuzziness("fuzz"))).
+				MatchedFields("title", "body").
+				NoMatchSize(64).
+				Order(OrderScore).
+				PhraseLimit(512).
+				RequireFieldMatch(false).
+				TagsSchema(TagsSchemaStyled),
+			map[string]interface{}{
+				"pre_tags":                []string{"<pre>", "<code>"},
+				"post_tags":               []string{"</code>", "</pre>"},
+				"fragment_size":           150,
+				"number_of_fragments":     4,
+				"type":                    "plain",
+				"boundary_chars":          "()[]",
+				"boundary_scanner":        "chars",
+				"boundary_max_scan":       32,
+				"boundary_scanner_locale": "en-US",
+				"encoder":                 "html",
+				"force_source":            true,
+				"fragment_offset":         6,
+				"fragmenter":              "simple",
+				"matched_fields":          []string{"title", "body"},
+				"no_match_size":           64,
+				"order":                   "score",
+				"phrase_limit":            512,
+				"require_field_match":     false,
+				"tags_schema":             "styled",
+				"fields": map[string]interface{}{
+					"content": map[string]interface{}{
+						"boundary_chars": ".;,",
+					},
+				},
+				"query": map[string]interface{}{
+					"bool": map[string]interface{}{
+						"must": []map[string]interface{}{
+							{
+								"match": map[string]interface{}{
+									"author": map[string]interface{}{
+										"analyzer":  "analyzer?",
+										"fuzziness": "fuzz",
+										"query":     "some guy",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	})
+}

query_multi_match.go

@@ -0,0 +1,210 @@
+package esquery
+
+import (
+	"github.com/fatih/structs"
+)
+
+type MultiMatchQuery struct {
+	params multiMatchParams
+}
+
+// Map returns a map representation of the query; implementing the
+// Mappable interface.
+func (q *MultiMatchQuery) Map() map[string]interface{} {
+	return map[string]interface{}{
+		"multi_match": structs.Map(q.params),
+	}
+}
+
+type multiMatchParams struct {
+	Qry          interface{}    `structs:"query"`
+	Fields       []string       `structs:"fields"`
+	Type         MultiMatchType `structs:"type,string,omitempty"`
+	TieBrk       float32        `structs:"tie_breaker,omitempty"`
+	Boost        float32        `structs:"boost,omitempty"`
+	Anl          string         `structs:"analyzer,omitempty"`
+	AutoGenerate *bool          `structs:"auto_generate_synonyms_phrase_query,omitempty"`
+	Fuzz         string         `structs:"fuzziness,omitempty"`
+	MaxExp       uint16         `structs:"max_expansions,omitempty"`
+	PrefLen      uint16         `structs:"prefix_length,omitempty"`
+	Trans        *bool          `structs:"transpositions,omitempty"`
+	FuzzyRw      string         `structs:"fuzzy_rewrite,omitempty"`
+	Lent         *bool          `structs:"lenient,omitempty"`
+	Op           MatchOperator  `structs:"operator,string,omitempty"`
+	MinMatch     string         `structs:"minimum_should_match,omitempty"`
+	ZeroTerms    ZeroTerms      `structs:"zero_terms_query,string,omitempty"`
+	Slp          uint16         `structs:"slop,omitempty"`
+}
+
+// MultiMatch creates a new query of type "multi_match"
+func MultiMatch(simpleQuery ...interface{}) *MultiMatchQuery {
+	return newMultiMatch(simpleQuery...)
+}
+
+func newMultiMatch(simpleQuery ...interface{}) *MultiMatchQuery {
+	var qry interface{}
+	if len(simpleQuery) > 0 {
+		qry = simpleQuery[len(simpleQuery)-1]
+	}
+
+	return &MultiMatchQuery{
+		params: multiMatchParams{
+			Qry: qry,
+		},
+	}
+}
+
+// Query sets the data to find in the query's field (it is the "query" component
+// of the query).
+func (q *MultiMatchQuery) Query(data interface{}) *MultiMatchQuery {
+	q.params.Qry = data
+	return q
+}
+
+// Analyzer sets the analyzer used to convert the text in the "query" value into
+// tokens.
+func (q *MultiMatchQuery) Analyzer(a string) *MultiMatchQuery {
+	q.params.Anl = a
+	return q
+}
+
+// Fields sets the fields used in the query
+func (q *MultiMatchQuery) Fields(a ...string) *MultiMatchQuery {
+	q.params.Fields = append(q.params.Fields, a...)
+	return q
+}
+
+// AutoGenerateSynonymsPhraseQuery sets the "auto_generate_synonyms_phrase_query"
+// boolean.
+func (q *MultiMatchQuery) AutoGenerateSynonymsPhraseQuery(b bool) *MultiMatchQuery {
+	q.params.AutoGenerate = &b
+	return q
+}
+
+// Fuzziness set the maximum edit distance allowed for matching.
+func (q *MultiMatchQuery) Fuzziness(f string) *MultiMatchQuery {
+	q.params.Fuzz = f
+	return q
+}
+
+// MaxExpansions sets the maximum number of terms to which the query will expand.
+func (q *MultiMatchQuery) MaxExpansions(e uint16) *MultiMatchQuery {
+	q.params.MaxExp = e
+	return q
+}
+
+// PrefixLength sets the number of beginning characters left unchanged for fuzzy
+// matching.
+func (q *MultiMatchQuery) PrefixLength(l uint16) *MultiMatchQuery {
+	q.params.PrefLen = l
+	return q
+}
+
+// TieBreaker
+func (q *MultiMatchQuery) TieBreaker(l float32) *MultiMatchQuery {
+	q.params.TieBrk = l
+	return q
+}
+
+// Boost
+func (q *MultiMatchQuery) Boost(l float32) *MultiMatchQuery {
+	q.params.Boost = l
+	return q
+}
+
+// Transpositions sets whether edits for fuzzy matching include transpositions
+// of two adjacent characters.
+func (q *MultiMatchQuery) Transpositions(b bool) *MultiMatchQuery {
+	q.params.Trans = &b
+	return q
+}
+
+// FuzzyRewrite sets the method used to rewrite the query.
+func (q *MultiMatchQuery) FuzzyRewrite(s string) *MultiMatchQuery {
+	q.params.FuzzyRw = s
+	return q
+}
+
+// Lenient sets whether format-based errors should be ignored.
+func (q *MultiMatchQuery) Lenient(b bool) *MultiMatchQuery {
+	q.params.Lent = &b
+	return q
+}
+
+// Operator sets the boolean logic used to interpret text in the query value.
+func (q *MultiMatchQuery) Operator(op MatchOperator) *MultiMatchQuery {
+	q.params.Op = op
+	return q
+}
+
+// Type sets the query type
+func (q *MultiMatchQuery) Type(t MultiMatchType) *MultiMatchQuery {
+	q.params.Type = t
+	return q
+}
+
+// MinimumShouldMatch sets the minimum number of clauses that must match for a
+// document to be returned.
+func (q *MultiMatchQuery) MinimumShouldMatch(s string) *MultiMatchQuery {
+	q.params.MinMatch = s
+	return q
+}
+
+// Slop sets the maximum number of positions allowed between matching tokens.
+func (q *MultiMatchQuery) Slop(n uint16) *MultiMatchQuery {
+	q.params.Slp = n
+	return q
+}
+
+// ZeroTermsQuery sets the "zero_terms_query" option to use. This indicates
+// whether no documents are returned if the analyzer removes all tokens, such as
+// when using a stop filter.
+func (q *MultiMatchQuery) ZeroTermsQuery(s ZeroTerms) *MultiMatchQuery {
+	q.params.ZeroTerms = s
+	return q
+}
+
+// MatchType is an enumeration type representing supported values for a
+// multi match query's "type" parameter.
+type MultiMatchType uint8
+
+const (
+	// TypeBestFields is the "best_fields" type
+	MatchTypeBestFields MultiMatchType = iota
+
+	// TypeMostFields is the "most_fields" type
+	MatchTypeMostFields
+
+	// TypeMostFields is the "cross_fields" type
+	MatchTypeCrossFields
+
+	// TypeMostFields is the "phrase" type
+	MatchTypePhrase
+
+	// TypeMostFields is the "phrase_prefix" type
+	MatchTypePhrasePrefix
+
+	// TypeMostFields is the "bool_prefix" type
+	MatchTypeBoolPrefix
+)
+
+// String returns a string representation of the match operator, as known to
+// ElasticSearch.
+func (a MultiMatchType) String() string {
+	switch a {
+	case MatchTypeBestFields:
+		return "best_fields"
+	case MatchTypeMostFields:
+		return "most_fields"
+	case MatchTypeCrossFields:
+		return "cross_fields"
+	case MatchTypePhrase:
+		return "phrase"
+	case MatchTypePhrasePrefix:
+		return "phrase_prefix"
+	case MatchTypeBoolPrefix:
+		return "bool_prefix"
+	default:
+		return ""
+	}
+}

query_multi_match_test.go

@@ -0,0 +1,62 @@
+package esquery
+
+import (
+	"testing"
+)
+
+func TestMultiMatch(t *testing.T) {
+	runMapTests(t, []mapTest{
+		{
+			"simple multi_match",
+			MultiMatch("value1", "value2").Fields("title"),
+			map[string]interface{}{
+				"multi_match": map[string]interface{}{
+					"fields": []string{"title"},
+					"query":  "value2",
+				},
+			},
+		},
+		{
+			"multi_match all params",
+			MultiMatch("original").
+				Query("test").
+				Analyzer("stop").
+				Fields("title", "body").
+				AutoGenerateSynonymsPhraseQuery(true).
+				Fuzziness("AUTO").
+				MaxExpansions(16).
+				PrefixLength(12).
+				TieBreaker(0.3).
+				Boost(6.4).
+				Transpositions(true).
+				FuzzyRewrite("scoring_boolean").
+				Lenient(true).
+				Operator(OperatorAnd).
+				Type(MatchTypePhrase).
+				MinimumShouldMatch("3<90%").
+				Slop(2).
+				ZeroTermsQuery(ZeroTermsAll),
+			map[string]interface{}{
+				"multi_match": map[string]interface{}{
+					"analyzer":                            "stop",
+					"auto_generate_synonyms_phrase_query": true,
+					"boost":                               6.4,
+					"fuzziness":                           "AUTO",
+					"fuzzy_rewrite":                       "scoring_boolean",
+					"lenient":                             true,
+					"max_expansions":                      16,
+					"minimum_should_match":                "3<90%",
+					"prefix_length":                       12,
+					"transpositions":                      true,
+					"type":                                "phrase",
+					"tie_breaker":                         0.3,
+					"operator":                            "AND",
+					"zero_terms_query":                    "all",
+					"slop":                                2,
+					"query":                               "test",
+					"fields":                              []string{"title", "body"},
+				},
+			},
+		},
+	})
+}

search.go

@@ -15,15 +15,16 @@ import (
 // Not all features of the search API are currently supported, but a request can
 // currently include a query, aggregations, and more.
 type SearchRequest struct {
-	query      Mappable
 	aggs       []Aggregation
-	postFilter Mappable
-	from       *uint64
-	size       *uint64
 	explain    *bool
-	timeout    *time.Duration
+	from       *uint64
-	source     Source
+	highlight  Mappable
+	postFilter Mappable
+	query      Mappable
+	size       *uint64
 	sort       Sort
+	source     Source
+	timeout    *time.Duration
 }
 
 // Search creates a new SearchRequest object, to be filled via method chaining.
@@ -98,6 +99,13 @@ func (req *SearchRequest) SourceExcludes(keys ...string) *SearchRequest {
 	return req
 }
 
+// Highlight sets a highlight for the request.
+func (req *SearchRequest) Highlight(highlight Mappable) *SearchRequest {
+	req.highlight = highlight
+	return req
+}
+
+
 // Map implements the Mappable interface. It converts the request to into a
 // nested map[string]interface{}, as expected by the go-elasticsearch library.
 func (req *SearchRequest) Map() map[string]interface{} {
@@ -131,6 +139,9 @@ func (req *SearchRequest) Map() map[string]interface{} {
 	if req.timeout != nil {
 		m["timeout"] = fmt.Sprintf("%.0fs", req.timeout.Seconds())
 	}
+	if req.highlight != nil {
+		m["highlight"] = req.highlight.Map()
+	}
 
 	source := req.source.Map()
 	if len(source) > 0 {