Question

I work in EF.Xml definition table is …

    <EntityType Name="ShippingCards">
      <Key>
        <PropertyRef Name="ShippingCardID" />
      </Key>
      <Property Name="ShippingCardID" Type="int" Nullable="false" StoreGeneratedPattern="Identity" />
      <Property Name="ProducedID" Type="int" />
      <Property Name="User" Type="int" />
      <Property Name="Count" Type="int" />
    </EntityType>

methode is definition

    public void addProduct(Product product)
    {
        ShippingCard sc = new ShippingCard();
        sc.ProducedID = product.ProductID;
        Add(sc);
        context.SaveChanges();
    }

When you try to put in the product in the cart breaks my mistake

{“A dependent property in a ReferentialConstraint is mapped to a store-generated column. Column: ‘ShippingCardID’.”}

InnerError:
{“A dependent property in a ReferentialConstraint is mapped to a store-generated column. Column: ‘ShippingCardID’.”}

Answer 1

You have incorrectly defined relations between entities. This error says that ShippingCardID is used as foreign key (= dependent property) in some relation which is not allowed because only properties with StoreGeneratedPattern.None can be used as foreign keys.