public void Constructor_throws_when_principal_and_depedent_property_count_do_not_match()
        {
            var dependentType = new Model().AddEntityType("D");
            var principalType = new Model().AddEntityType("P");

            var dependentProperty1 = dependentType.GetOrAddProperty("P1", typeof(int), shadowProperty: true);
            var dependentProperty2 = dependentType.GetOrAddProperty("P2", typeof(int), shadowProperty: true);

            principalType.GetOrSetPrimaryKey(principalType.GetOrAddProperty("Id", typeof(int), shadowProperty: true));

            Assert.Equal(
                Strings.ForeignKeyCountMismatch("{'P1', 'P2'}", "D", "{'Id'}", "P"),
                Assert.Throws<InvalidOperationException>(
                    () => new ForeignKey(new[] { dependentProperty1, dependentProperty2 }, principalType.GetPrimaryKey(), principalType)).Message);
        }
        public void Can_create_foreign_key()
        {
            var entityType = new Model().AddEntityType("E");
            var dependentProp = entityType.AddProperty("P", typeof(int));
            var principalProp = entityType.AddProperty("Id", typeof(int));
            entityType.GetOrSetPrimaryKey(principalProp);

            var foreignKey
                = new ForeignKey(new[] { dependentProp }, entityType.GetPrimaryKey(), entityType, entityType)
                    {
                        IsUnique = true
                    };

            Assert.Same(entityType, foreignKey.PrincipalEntityType);
            Assert.Same(principalProp, foreignKey.PrincipalKey.Properties.Single());
            Assert.Same(dependentProp, foreignKey.Properties.Single());
            Assert.True(foreignKey.IsUnique.Value);
            Assert.Same(entityType.GetPrimaryKey(), foreignKey.PrincipalKey);
        }
        public void Constructor_throws_when_principal_and_depedent_property_types_do_not_match()
        {
            var dependentType = new Model().AddEntityType("D");
            var principalType = new Model().AddEntityType("P");

            var dependentProperty1 = dependentType.AddProperty("P1", typeof(int));
            var dependentProperty2 = dependentType.AddProperty("P2", typeof(string));

            var property2 = principalType.AddProperty("Id1", typeof(int));
            var property3 = principalType.AddProperty("Id2", typeof(int));
            principalType.GetOrSetPrimaryKey(new[]
                {
                    property2,
                    property3
                });

            Assert.Equal(
                CoreStrings.ForeignKeyTypeMismatch("{'P1', 'P2'}", "D", "{'Id1', 'Id2'}", "P"),
                Assert.Throws<InvalidOperationException>(
                    () => new ForeignKey(new[] { dependentProperty1, dependentProperty2 }, principalType.GetPrimaryKey(), dependentType, principalType)).Message);
        }
        public void Can_change_cascade_delete_flag()
        {
            var entityType = new Model().AddEntityType("E");
            var keyProp = entityType.AddProperty("Id", typeof(int));
            var dependentProp = entityType.AddProperty("P", typeof(int));
            var principalProp = entityType.AddProperty("U", typeof(int));
            entityType.GetOrSetPrimaryKey(keyProp);
            var principalKey = entityType.AddKey(principalProp);

            var foreignKey
                = new ForeignKey(new[] { dependentProp }, principalKey, entityType, entityType);

            Assert.Null(foreignKey.DeleteBehavior);
            Assert.Equal(DeleteBehavior.None, ((IForeignKey)foreignKey).DeleteBehavior);

            foreignKey.DeleteBehavior = DeleteBehavior.Cascade;

            Assert.Equal(DeleteBehavior.Cascade, foreignKey.DeleteBehavior);
            Assert.Equal(DeleteBehavior.Cascade, ((IForeignKey)foreignKey).DeleteBehavior);

            foreignKey.DeleteBehavior = DeleteBehavior.None;

            Assert.Equal(DeleteBehavior.None, foreignKey.DeleteBehavior);
            Assert.Equal(DeleteBehavior.None, ((IForeignKey)foreignKey).DeleteBehavior);

            foreignKey.DeleteBehavior = null;

            Assert.Null(foreignKey.DeleteBehavior);
            Assert.Equal(DeleteBehavior.None, ((IForeignKey)foreignKey).DeleteBehavior);
        }
        private ForeignKey CreateSelfRefFK(bool useAltKey = false)
        {
            var entityType = new Model().AddEntityType(typeof(SelfRef));
            var pk = entityType.GetOrSetPrimaryKey(entityType.AddProperty(SelfRef.IdProperty));
            var fkProp = entityType.AddProperty(SelfRef.SelfRefIdProperty);

            var property = entityType.AddProperty("AltId", typeof(int));
            var principalKey = useAltKey
                ? entityType.GetOrAddKey(property)
                : pk;

            var fk = entityType.AddForeignKey(new[] { fkProp }, principalKey, entityType);
            fk.IsUnique = true;
            entityType.AddNavigation("SelfRefPrincipal", fk, pointsToPrincipal: true);
            entityType.AddNavigation("SelfRefDependent", fk, pointsToPrincipal: false);
            return fk;
        }
        public void Setting_IsRequired_to_false_will_set_all_FK_properties_as_nullable()
        {
            var entityType = new Model().AddEntityType("E");
            var property = entityType.AddProperty("Id1", typeof(int));
            var property1 = entityType.AddProperty("Id2", typeof(string));
            entityType.GetOrSetPrimaryKey(new[]
                {
                    property,
                    property1
                });

            var dependentProp1 = entityType.AddProperty("P1", typeof(int?));
            var dependentProp2 = entityType.AddProperty("P2", typeof(string));

            var foreignKey = new ForeignKey(new[] { dependentProp1, dependentProp2 }, entityType.GetPrimaryKey(), entityType, entityType) { IsRequired = false };

            Assert.False(foreignKey.IsRequired.Value);
            Assert.True(dependentProp1.IsNullable.Value);
            Assert.True(dependentProp2.IsNullable.Value);
        }
        public void IsRequired_false_when_any_part_of_composite_FK_is_nullable()
        {
            var entityType = new Model().AddEntityType("E");
            var property = entityType.AddProperty("Id1", typeof(int));
            var property1 = entityType.AddProperty("Id2", typeof(string));
            entityType.GetOrSetPrimaryKey(new[]
                {
                    property,
                    property1
                });

            var dependentProp1 = entityType.AddProperty("P1", typeof(int));
            var dependentProp2 = entityType.AddProperty("P2", typeof(string));
            dependentProp2.IsNullable = true;

            var foreignKey = new ForeignKey(new[] { dependentProp1, dependentProp2 }, entityType.GetPrimaryKey(), entityType, entityType);

            Assert.False(foreignKey.IsRequired);
            Assert.False(((IForeignKey)foreignKey).IsRequired);

            dependentProp2.IsNullable = false;

            Assert.True(foreignKey.IsRequired);
            Assert.True(((IForeignKey)foreignKey).IsRequired);
        }
        public void IsRequired_false_for_composite_FK_by_default()
        {
            var entityType = new Model().AddEntityType("E");
            var property = entityType.AddProperty("Id1", typeof(int));
            var property1 = entityType.AddProperty("Id2", typeof(string));
            entityType.GetOrSetPrimaryKey(new[]
                {
                    property,
                    property1
                });

            var dependentProp1 = entityType.AddProperty("P1", typeof(int));
            var dependentProp2 = entityType.AddProperty("P2", typeof(string));

            var foreignKey = new ForeignKey(new[] { dependentProp1, dependentProp2 }, entityType.GetPrimaryKey(), entityType, entityType);

            Assert.Null(foreignKey.IsRequired);
            Assert.False(((IForeignKey)foreignKey).IsRequired);
        }
        public void IsRequired_and_IsUnique_null_when_dependent_property_nullable_by_default()
        {
            var entityType = new Model().AddEntityType("E");
            var property = entityType.AddProperty("Id", typeof(int));
            entityType.GetOrSetPrimaryKey(property);
            var dependentProp = entityType.AddProperty("P", typeof(int?));

            var foreignKey = new ForeignKey(new[] { dependentProp }, entityType.GetPrimaryKey(), entityType, entityType);

            Assert.Null(foreignKey.IsRequired);
            Assert.False(((IForeignKey)foreignKey).IsRequired);
            Assert.Null(foreignKey.IsUnique);
            Assert.False(((IForeignKey)foreignKey).IsUnique);
        }
        public void IsRequired_false_when_dependent_property_nullable()
        {
            var entityType = new Model().AddEntityType("E");
            var property = entityType.AddProperty("Id", typeof(int));
            entityType.GetOrSetPrimaryKey(property);
            var dependentProp = entityType.AddProperty("P", typeof(int?));
            dependentProp.IsNullable = true;

            var foreignKey = new ForeignKey(new[] { dependentProp }, entityType.GetPrimaryKey(), entityType, entityType);

            Assert.False(foreignKey.IsRequired);
            Assert.False(((IForeignKey)foreignKey).IsRequired);
        }
        public void Can_create_foreign_key_with_non_pk_principal()
        {
            var entityType = new Model().AddEntityType("E");
            var keyProp = entityType.GetOrAddProperty("Id", typeof(int), shadowProperty: true);
            var dependentProp = entityType.GetOrAddProperty("P", typeof(int), shadowProperty: true);
            var principalProp = entityType.GetOrAddProperty("U", typeof(int), shadowProperty: true);
            entityType.GetOrSetPrimaryKey(keyProp);
            var principalKey = entityType.AddKey(principalProp);

            var foreignKey
                = new ForeignKey(new[] { dependentProp }, principalKey, entityType)
                {
                    IsUnique = false
                };

            Assert.Same(entityType, foreignKey.PrincipalEntityType);
            Assert.Same(principalProp, foreignKey.PrincipalKey.Properties.Single());
            Assert.Same(dependentProp, foreignKey.Properties.Single());
            Assert.False(foreignKey.IsUnique.Value);
            Assert.Same(principalKey, foreignKey.PrincipalKey);
        }
        public void IsRequired_true_when_dependent_property_not_nullable()
        {
            var entityType = new Model().AddEntityType("E");
            entityType.GetOrSetPrimaryKey(entityType.GetOrAddProperty("Id", typeof(int), shadowProperty: true));
            var dependentProp = entityType.GetOrAddProperty("P", typeof(int), shadowProperty: true);
            dependentProp.IsNullable = false;

            var foreignKey = new ForeignKey(new[] { dependentProp }, entityType.GetPrimaryKey(), entityType);

            Assert.Null(foreignKey.IsRequired);
            Assert.True(((IForeignKey)foreignKey).IsRequired);
        }