where - EntityFrameworkCore Linq error: variable 'country.Country' of type 'Country' referenced from scope '', but it is not defined -

entityframeworkcore: 1.1.0

i invalidoperationexception "simple" linq query , cannot figure out why. works tags, not countries.

i try execute following query:

var tags = new string[]{"guid1", "guid2"}; var countries = new int[]{1, 2}; var test = _dbcontext.articles             .include(a => a.countries).theninclude(c => c.country)             .include(a => a.tags)             .where(article => article.tags.any(t => tags.contains(t.tag.id)) &&                               article.countries.any(c2 => countries.contains(c2.country.id)))            .tolist(); 

and following exception:

variable 'c2.country' of type 'country' referenced scope '', not defined

with following entities:

public class article {     /// <summary>     /// unique id of article     /// </summary>     [required]     public guid id { get; set; }      /// <summary>     /// article type     /// </summary>     [required]     public articletypes type { get; set; }      /// <summary>     /// gets or sets article tags.     /// </summary>     /// <value>     /// article tags.     /// </value>     public icollection<articletag> tags { get; set; }      /// <summary>     /// gets or sets countries.     /// </summary>     /// <value>     /// countries.     /// </value>     public icollection<articlecountry> countries { get; set; } }  public class articlecountry {     /// <summary>     /// gets or sets identifier.     /// </summary>     /// <value>     /// identifier.     /// </value>     public guid id { get; set; }      /// <summary>     /// gets or sets country.     /// </summary>     /// <value>     /// country.     /// </value>     public country country { get; set; }      /// <summary>     ///      /// </summary>     public int position { get; set; } }  public class country {     /// <summary>     /// gets or sets identifier.     /// </summary>     /// <value>     /// identifier.     /// </value>     [jsonignore]     public int id { get; set; }      /// <summary>     /// unique country code     /// </summary>     [jsonproperty("key")]     [required]     [stringlength(2)]     public string code { get; set; }      /// <summary>     /// country name     /// </summary>     [jsonproperty("name")]     [required]     public string name { get; set; } }  public class tag {     /// <summary>     /// tag unique key     /// </summary>     [jsonproperty("key")]     [required]     public guid id { get; set; }      /// <summary>     /// tag name     /// </summary>     [jsonproperty("name")]     [required]     public string name { get; set; } }  public class articletag {     /// <summary>     /// gets or sets identifier.     /// </summary>     /// <value>     /// identifier.     /// </value>     [required]     public guid id { get; set; }      /// <summary>     /// gets or sets order.     /// </summary>     /// <value>     /// order.     /// </value>     [required]     public int position { get; set; }      /// <summary>     /// gets or sets tag.     /// </summary>     /// <value>     /// tag.     /// </value>     [required]     public tag tag { get; set; } } 

i can see following warning in console:

warn: microsoft.entityframeworkcore.query.internal.sqlserverquerycompilationcontextfactory[8] linq expression '{__countries_1 => contains(convert((?[c2.country].id?)))}' not translated , evaluated locally. configure warning use dbcontextoptionsbuilder.configurewarnings api (event id 'relationaleventid.queryclientevaluationwarning'). configurewarnings can used when overriding dbcontext.onconfiguring method or using adddbcontext on application service provider.