public static async Task <List <string> > SimpleCompletionSuggest <T>(this IElasticClient client,
string index,
string keyword, string analyzer = null, int size = 20)
where T : CompletionSuggestIndexBase
{
var data = new List <string>();
if (!ValidateHelper.IsPlumpString(keyword))
{
return(data);
}
var sd = new CompletionSuggesterDescriptor <T>();
sd = sd.Field(f => f.CompletionSearchTitle).Text(keyword);
if (ValidateHelper.IsPlumpString(analyzer))
{
sd = sd.Analyzer(analyzer);
}
//允许错4个单词
sd = sd.Fuzzy(f => f.Fuzziness(Fuzziness.EditDistance(4)));
sd = sd.Size(size);
var s_name = "p";
var response = await client.SuggestAsync <T>(x => x.Index(index).Completion(s_name, f => sd));
response.ThrowIfException();
var list = response.Suggestions?[s_name]?.FirstOrDefault()?.Options?.ToList();
if (!ValidateHelper.IsPlumpList(list))
{
return(data);
}
var sggs = list.OrderByDescending(x => x.Score).Select(x => x.Text);
data.AddRange(sggs);
return(data.Where(x => ValidateHelper.IsPlumpString(x)).Distinct().ToList());
}
/// <summary>
/// 搜索建议
/// </summary>
public static IDictionary <string, Suggest[]> CompletionSuggest <T>(this IElasticClient client,
string index,
Expression <Func <T, object> > targetField, string text, string analyzer = null,
string highlight_pre = "<em>", string hightlight_post = "</em>", int size = 20)
where T : class, IElasticSearchIndex
{
var sd = new CompletionSuggesterDescriptor <T>();
sd = sd.Field(targetField).Text(text);
if (ValidateHelper.IsPlumpString(analyzer))
{
sd = sd.Analyzer(analyzer);
}
sd = sd.Size(size);
var response = client.Suggest <T>(x => x.Index(index).Completion("completion_suggest", f => sd));
response.ThrowIfException();
return(response.Suggestions);
}
/// <summary>
/// 搜索建议
/// https://elasticsearch.cn/article/142
/// https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/suggest-usage.html
/// https://www.elastic.co/guide/en/elasticsearch/reference/6.2/search-suggesters.html
/// https://www.elastic.co/guide/en/elasticsearch/reference/6.2/search-suggesters-completion.html
/// </summary>
static ISuggestDictionary <T> SuggestSample <T>(IElasticClient client,
string index,
Expression <Func <T, object> > targetField, string text, string analyzer = null,
string highlight_pre = "<em>", string hightlight_post = "</em>", int size = 20)
where T : class, IESIndex
{
var sd = new TermSuggesterDescriptor <T>();
sd = sd.Field(targetField).Text(text);
if (ValidateHelper.IsNotEmpty(analyzer))
{
sd = sd.Analyzer(analyzer);
}
sd = sd.Size(size);
var csd = new CompletionSuggesterDescriptor <T>();
var psd = new PhraseSuggesterDescriptor <T>();
var response = client.Search <T>(s => s.Suggest(ss => ss
.Term("my-term-suggest", t => t
.MaxEdits(1)
.MaxInspections(2)
.MaxTermFrequency(3)
.MinDocFrequency(4)
.MinWordLength(5)
.PrefixLength(6)
.SuggestMode(SuggestMode.Always)
.Analyzer("standard")
.Field("")
.ShardSize(7)
.Size(8)
.Text(text)
)
.Completion("my-completion-suggest", c => c
.Contexts(ctxs => ctxs
.Context("color",
ctx => ctx.Context(text)
)
)
.Fuzzy(f => f
.Fuzziness(Fuzziness.Auto)
.MinLength(1)
.PrefixLength(2)
.Transpositions()
.UnicodeAware(false)
)
.Analyzer("simple")
.Field("")
.Size(8)
.Prefix(text)
)
.Phrase("my-phrase-suggest", ph => ph
.Collate(c => c
.Query(q => q
.Source("{ \"match\": { \"{{field_name}}\": \"{{suggestion}}\" }}")
)
.Params(p => p.Add("field_name", "title"))
.Prune()
)
.Confidence(10.1)
.DirectGenerator(d => d
.Field("")
)
.GramSize(1)
.Field("")
.Text(text)
.RealWordErrorLikelihood(0.5)
)
));
response.ThrowIfException();
return(response.Suggest);
}
