Spaces:
Running
Running
File size: 4,419 Bytes
b110593 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 |
// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package answer
import (
"context"
"errors"
"sort"
"strings"
"github.com/weaviate/weaviate/entities/models"
"github.com/weaviate/weaviate/entities/search"
qnamodels "github.com/weaviate/weaviate/modules/qna-transformers/additional/models"
"github.com/weaviate/weaviate/modules/qna-transformers/ent"
)
func (p *AnswerProvider) findAnswer(ctx context.Context,
in []search.Result, params *Params, limit *int,
argumentModuleParams map[string]interface{},
) ([]search.Result, error) {
if len(in) > 0 {
question := p.paramsHelper.GetQuestion(argumentModuleParams["ask"])
if question == "" {
return in, errors.New("empty question")
}
properties := p.paramsHelper.GetProperties(argumentModuleParams["ask"])
for i := range in {
textProperties := map[string]string{}
schema := in[i].Object().Properties.(map[string]interface{})
for property, value := range schema {
if p.containsProperty(property, properties) {
if valueString, ok := value.(string); ok && len(valueString) > 0 {
textProperties[property] = valueString
}
}
}
texts := []string{}
for _, value := range textProperties {
texts = append(texts, value)
}
text := strings.Join(texts, " ")
if len(text) == 0 {
return in, errors.New("empty content")
}
answer, err := p.qna.Answer(ctx, text, question)
if err != nil {
return in, err
}
ap := in[i].AdditionalProperties
if ap == nil {
ap = models.AdditionalProperties{}
}
if answerMeetsSimilarityThreshold(argumentModuleParams["ask"], p.paramsHelper, answer) {
propertyName, startPos, endPos := p.findProperty(answer.Answer, textProperties)
ap["answer"] = &qnamodels.Answer{
Result: answer.Answer,
Property: propertyName,
StartPosition: startPos,
EndPosition: endPos,
Certainty: answer.Certainty,
Distance: answer.Distance,
HasAnswer: answer.Answer != nil,
}
} else {
ap["answer"] = &qnamodels.Answer{
HasAnswer: false,
}
}
in[i].AdditionalProperties = ap
}
}
rerank := p.paramsHelper.GetRerank(argumentModuleParams["ask"])
if rerank {
return p.rerank(in), nil
}
return in, nil
}
func answerMeetsSimilarityThreshold(params interface{}, helper paramsHelper, ans *ent.AnswerResult) bool {
certainty := helper.GetCertainty(params)
if certainty > 0 && ans.Certainty != nil && *ans.Certainty < certainty {
return false
}
distance := helper.GetDistance(params)
if distance > 0 && ans.Distance != nil && *ans.Distance > distance {
return false
}
return true
}
func (p *AnswerProvider) rerank(in []search.Result) []search.Result {
if len(in) > 0 {
sort.SliceStable(in, func(i, j int) bool {
return p.getAnswerCertainty(in[i]) > p.getAnswerCertainty(in[j])
})
}
return in
}
func (p *AnswerProvider) getAnswerCertainty(result search.Result) float64 {
answerObj, ok := result.AdditionalProperties["answer"]
if ok {
answer, ok := answerObj.(*qnamodels.Answer)
if ok {
if answer.HasAnswer {
return *answer.Certainty
}
}
}
return 0
}
func (p *AnswerProvider) containsProperty(property string, properties []string) bool {
if len(properties) == 0 {
return true
}
for i := range properties {
if properties[i] == property {
return true
}
}
return false
}
func (p *AnswerProvider) findProperty(answer *string, textProperties map[string]string) (*string, int, int) {
if answer == nil {
return nil, 0, 0
}
lowercaseAnswer := strings.ToLower(*answer)
if len(lowercaseAnswer) > 0 {
for property, value := range textProperties {
lowercaseValue := strings.ToLower(strings.ReplaceAll(value, "\n", " "))
if strings.Contains(lowercaseValue, lowercaseAnswer) {
startIndex := strings.Index(lowercaseValue, lowercaseAnswer)
return &property, startIndex, startIndex + len(lowercaseAnswer)
}
}
}
propertyNotFound := ""
return &propertyNotFound, 0, 0
}
|