Don't throw on missing store generated values in data seeds.

Fixes #14161

Author: AndriySvyryd

src/EFCore/Infrastructure/ModelValidator.cs

@@ -568,7 +568,8 @@ protected virtual void ValidateData([NotNull] IModel model)
                             || value == null)
                         {
                             if (!property.IsNullable
-                                && (!property.RequiresValueGenerator()
+                                && ((!property.RequiresValueGenerator()
+                                        && (property.ValueGenerated & ValueGenerated.OnAdd) == 0)
                                     || property.IsKey()))
                             {
                                 throw new InvalidOperationException(CoreStrings.SeedDatumMissingValue(entityType.DisplayName(), property.Name));

test/EFCore.Tests/Infrastructure/ModelValidatorTest.cs

@@ -752,13 +752,33 @@ public virtual void Detects_missing_required_values_in_seeds()
                 modelBuilder.Model);
         }
 
+        [Fact]
+        public virtual void Passes_on_missing_required_store_generated_values_in_seeds()
+        {
+            var modelBuilder = CreateModelBuilder();
+            modelBuilder.Entity<A>(
+                e =>
+                {
+                    e.Property(a => a.P0).IsRequired().ValueGeneratedOnAddOrUpdate();
+                    e.HasData(
+                        new A
+                        {
+                            Id = 1
+                        });
+                });
+
+            Validate(modelBuilder.Model);
+        }
+
         [Fact]
         public virtual void Detects_missing_key_values_in_seeds()
         {
             var entity = new NonSignedIntegerKeyEntity();
             var modelBuilder = CreateModelBuilder();
             modelBuilder.Entity<NonSignedIntegerKeyEntity>(e => e.HasData(entity));
 
+            Assert.Equal(ValueGenerated.OnAdd,
+                modelBuilder.Model.FindEntityType(typeof(NonSignedIntegerKeyEntity)).FindProperty(nameof(NonSignedIntegerKeyEntity.Id)).ValueGenerated);
             VerifyError(
                 CoreStrings.SeedDatumDefaultValue(nameof(NonSignedIntegerKeyEntity), nameof(NonSignedIntegerKeyEntity.Id), entity.Id),
                 modelBuilder.Model);