Fixes #63 : cannot handle shadow properties, or properties without ge…

src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/TableMetadata.cs

@@ -26,16 +26,32 @@ public TableMetadata(IEntityType entityType, SqlDialectBuilder dialect)
         Columns = GetColumns(entityType, dialect);
     }
 
+    private static bool CanHandleProperty(IProperty property)
+    {
+        if (property.PropertyInfo == null || property.IsShadowProperty())
+        {
+            return false;
+        }
+
+        var getMethod = property.PropertyInfo.GetGetMethod();
+        if (getMethod == null || getMethod.GetParameters().Length > 0)
+        {
+            return false;
+        }
+
+        return true;
+    }
+
     private static ColumnMetadata[] GetColumns(IEntityType entityType, SqlDialectBuilder dialect)
     {
         var properties = entityType.GetProperties()
-            .Where(p => !p.IsShadowProperty())
+            .Where(CanHandleProperty)
             .Select(x => new ColumnMetadata(x, dialect));
 
         var complexProperties = entityType.GetComplexProperties()
             .SelectMany(cp => cp.ComplexType
                 .GetProperties()
-                .Where(p => !p.IsShadowProperty())
+                .Where(CanHandleProperty)
                 .Select(x => new ColumnMetadata(x, dialect, cp)));
 
         return properties.Concat(complexProperties).ToArray();

tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/Course.cs

@@ -0,0 +1,8 @@
+namespace PhenX.EntityFrameworkCore.BulkInsert.Tests.DbContext;
+
+public class Course
+{
+    public int Id { get; set; }
+    public string Title { get; set; } = null!;
+    public ICollection<Student> Students { get; set; } = new List<Student>();
+}

tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/Student.cs

@@ -0,0 +1,8 @@
+namespace PhenX.EntityFrameworkCore.BulkInsert.Tests.DbContext;
+
+public class Student
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = null!;
+    public ICollection<Course> Courses { get; set; } = new List<Course>();
+}

tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/TestDbContext.cs

@@ -11,6 +11,8 @@ public class TestDbContext : TestDbContextBase
     public DbSet<TestEntityWithGuidId> TestEntitiesWithGuidId { get; set; } = null!;
     public DbSet<TestEntityWithConverters> TestEntitiesWithConverter { get; set; } = null!;
     public DbSet<TestEntityWithComplexType> TestEntitiesWithComplexType { get; set; } = null!;
+    public DbSet<Student> Students { get; set; } = null!;
+    public DbSet<Course> Courses { get; set; } = null!;
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -34,6 +36,21 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
                 .ComplexProperty(e => e.OwnedComplexType)
                 .IsRequired();
         });
+
+        // Many-to-many with shadow property
+        modelBuilder.Entity<Student>()
+            .HasMany(s => s.Courses)
+            .WithMany(c => c.Students)
+            .UsingEntity<Dictionary<string, object>>(
+                "StudentCourse",
+                j => j.HasOne<Course>().WithMany().HasForeignKey("CourseId"),
+                j => j.HasOne<Student>().WithMany().HasForeignKey("StudentId"),
+                j =>
+                {
+                    j.Property<DateTime>("EnrolledAt");
+                    j.HasKey("StudentId", "CourseId");
+                }
+            );
     }
 }
 
@@ -131,6 +148,3 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
         });
     }
 }
-
-
-