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query.go
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query.go
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package search
import "fmt"
// ElasticQuery elastic search query
type ElasticQuery struct {
Query struct {
BoolQuery struct {
Must []interface{} `json:"must,omitempty"`
Filter struct {
BoolFilter struct {
MustFilter []interface{} `json:"must,omitempty"`
ShouldFilter []interface{} `json:"should,omitempty"`
} `json:"bool,omitempty"`
} `json:"filter,omitempty"`
} `json:"bool,omitempty"`
} `json:"query,omitempty"`
Size string `json:"size"`
From string `json:"from"`
Sort string `json:"sort"`
Order string `json:"order"`
}
// QueryBuilder elasticsearch query builder by url query params
type QueryBuilder struct {
SearchQuery ElasticQuery `json:"SearchQuery"`
Params map[string][]string
}
// add term filter to queryDSL
func (qb *QueryBuilder) addMustFilterByTerm(paramKey, termKey string) {
if qb.Params[paramKey] != nil {
mustFilter := map[string]interface{}{
"term": map[string]interface{}{
termKey: qb.Params[paramKey][0],
},
}
qb.SearchQuery.Query.BoolQuery.Filter.BoolFilter.MustFilter = append(qb.SearchQuery.Query.BoolQuery.Filter.BoolFilter.MustFilter, mustFilter)
}
}
// add must filters in es query
func (qb *QueryBuilder) buildFilters() {
// todo: loop and yaml conf. but this one is faster as no loop, will try array switch
searchParams := GetFilterConfig()
for key, val := range searchParams {
m2 := val.(map[string]interface{})
pk := m2["filter"].(map[string]interface{})
pkey := fmt.Sprintf("%v", pk["key"])
//log.Println(key, pkey)
//log.Println(key, m2["filter"])
qb.addMustFilterByTerm(key, pkey)
}
}
func (eq *ElasticQuery) buildLimits(params map[string][]string) {
// defaults
eq.Size = "40"
eq.From = "0"
eq.Sort = `{ "date" : "desc"}`
// override defaults if provided
if params["limit"] != nil {
eq.Size = params["limit"][0]
}
if params["from"] != nil {
eq.From = params["from"][0]
}
if params["sort"] != nil {
if params["order"] != nil {
eq.Sort = fmt.Sprintf(` { "%s" : "%s" }`, params["sort"], params["order"])
}
}
}