/// <summary>
/// 查询。单一条件查询，一般是精确查询
/// </summary>
/// <typeparam name="TDocument">文档类型</typeparam>
/// <param name="context">ES上下恩</param>
/// <param name="field">字段名</param>
/// <param name="value">值</param>
/// <param name="index">索引名称。注意：必须小写</param>
/// <param name="cancellationToken">取消令牌</param>
public static async Task <IEnumerable <TDocument> > SearchAsync <TDocument>(this IElasticsearchContext context, string field, object value, string index = null, CancellationToken cancellationToken = default)
where TDocument : class
{
if (field.IsEmpty())
{
throw new ArgumentNullException(nameof(field));
}
index = context.GetIndexName(Helper.SafeIndexName <TDocument>(index));
var descriptor = new SearchDescriptor <TDocument>();
descriptor.Index(index)
.PostFilter(f => f.Term(x => x.Field(field).Value(value)));
Func <SearchDescriptor <TDocument>, ISearchRequest> selector = x => descriptor;
var response = await context.SearchAsync(selector, cancellationToken);
return(response.Documents);
}
/// <summary> /// 获取索引名称 /// </summary> private string GetIndex() => _context.GetIndexName <TResult>(_index);
