Question

我正在使用SpecFlow进行集成测试。

在下面的“Then”-step中，我在第expectedPersons.ShouldAllBeEquivalentTo(actualPersons);行得到一个ObjectDisposedException：

ObjectContext实例已被释放，不能再用于需要连接的操作。

[Then(@"the following persons should be in the database")]
public void ThenTheFollowingPersonShouldBeInTheDatabase(Table table)
{
    var expectedPersons = table.Rows.Select(expected => new Person
    {
        Id = int.Parse(expected["Id"]),
        Name = expected["Name"],
        Vorname = expected["Vorname"],
        Adressen = specflowPersonenAdressen.Where(p => p.PersonId == int.Parse(expected["Id"])).ToList()
        }).ToList();

        var actualPersons = new List<Person>();

        foreach (var row in table.Rows)
        {
            var queryCriteria = new PersonQueryCriteria
            {
                NameFilter = row["Name"],
                VornameFilter = row["Vorname"]
            };
            actualPersons.AddRange(personWorkUnit.GetPersonen(queryCriteria));
        }

        expectedPersons.ShouldAllBeEquivalentTo(actualPersons);
    }
}

方法personWorkUnit.GetPersonen(...)如下所示：

public ICollection<Person> GetPersonen(PersonQueryCriteria queryCriteria)
{
    using (var context = this.unitOfWorkContextFactory.Create())
    {
        var personRepository = this.repositoryFactory.Create<IPersonRepository>(context);
        return personRepository.GetPersons(queryCriteria).ToList();
    }
}

方法personRepository.GetPersons(...)如下所示：

public ICollection<Person> GetPersons(PersonQueryCriteria personQueryCriteria)
{
    var query = this.Context.GetQuery<Person>();
    query
        .Include(q => q.Adressen)
        .Include("Adressen.Adresse");

    if (!string.IsNullOrEmpty(personQueryCriteria.NameFilter))
    {
        query = query.Where(p => p.Name == personQueryCriteria.NameFilter);
    }

    if (!string.IsNullOrEmpty(personQueryCriteria.VornameFilter))
    {
        query = query.Where(p => p.Vorname == personQueryCriteria.VornameFilter);
    }

    return query.ToList();
}

我已经明确地包含了导航属性，因为据我所知，EF正在使用延迟加载。

数据库如下所示：

人1 ----- * PersonAdresse * ----- 1 Adresse

模型看起来像这样：

 public partial class Person
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Person()
    {
        this.Adressen = new HashSet<PersonAdresse>();
    }

    public int Id { get; set; }
    public string Name { get; set; }
    public string Vorname { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<PersonAdresse> Adressen { get; set; }
}

public partial class Adresse
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Adresse()
    {
        this.Personen = new HashSet<PersonAdresse>();
    }

    public int Id { get; set; }
    public string Strasse { get; set; }
    public string Ort { get; set; }
    public int Plz { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<PersonAdresse> Personen { get; set; }
}

public partial class PersonAdresse
{
    public int Id { get; set; }
    public int PersonId { get; set; }
    public int AdresseId { get; set; }

    public virtual Adresse Adresse { get; set; }
    public virtual Person Person { get; set; }
}

可能会出现什么问题，抛出此异常？

提前致谢

Answer 1

这是因为激活延迟加载。请尝试在您正在使用上下文的位置禁用LazyLoadingEnabled，如下所示

this.ContextOptions.LazyLoadingEnabled = false

验证验收测试数据时的ObjectDisposedException

1 个答案: