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[release/8.0] Don't generate a discriminator in the snapshot if there's no discriminator property. #33622

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merged 1 commit into from May 1, 2024
Merged

[release/8.0] Don't generate a discriminator in the snapshot if there's no discriminator property. #33622

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97 changes: 50 additions & 47 deletions src/EFCore.Design/Migrations/Design/CSharpSnapshotGenerator.cs
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Expand Up @@ -886,65 +886,68 @@ protected virtual void GenerateKeyAnnotations(string keyBuilderName, IKey key, I
?? discriminatorValueAnnotation?.Value)
!= null)
{
stringBuilder
.AppendLine()
.Append(entityTypeBuilderName)
.Append('.')
.Append("HasDiscriminator");

var discriminatorProperty = entityType.FindDiscriminatorProperty();
if (discriminatorPropertyAnnotation?.Value != null
&& discriminatorProperty != null)
{
var propertyClrType = FindValueConverter(discriminatorProperty)?.ProviderClrType
.MakeNullable(discriminatorProperty.IsNullable)
?? discriminatorProperty.ClrType;
stringBuilder
.Append('<')
.Append(Code.Reference(propertyClrType))
.Append(">(")
.Append(Code.Literal(discriminatorProperty.Name))
.Append(')');
}
else
if (discriminatorProperty != null)
{
stringBuilder
.Append("()");
}
.AppendLine()
.Append(entityTypeBuilderName)
.Append('.')
.Append("HasDiscriminator");

if (discriminatorMappingCompleteAnnotation?.Value != null)
{
var value = (bool)discriminatorMappingCompleteAnnotation.Value;
if (discriminatorProperty.DeclaringType == entityType
&& discriminatorProperty.Name != "Discriminator")
{
var propertyClrType = FindValueConverter(discriminatorProperty)?.ProviderClrType
.MakeNullable(discriminatorProperty.IsNullable)
?? discriminatorProperty.ClrType;
stringBuilder
.Append('<')
.Append(Code.Reference(propertyClrType))
.Append(">(")
.Append(Code.Literal(discriminatorProperty.Name))
.Append(')');
}
else
{
stringBuilder
.Append("()");
}

stringBuilder
.Append('.')
.Append("IsComplete")
.Append('(')
.Append(Code.Literal(value))
.Append(')');
}
if (discriminatorMappingCompleteAnnotation?.Value != null)
{
var value = (bool)discriminatorMappingCompleteAnnotation.Value;

if (discriminatorValueAnnotation?.Value != null)
{
var value = discriminatorValueAnnotation.Value;
if (discriminatorProperty != null)
stringBuilder
.Append('.')
.Append("IsComplete")
.Append('(')
.Append(Code.Literal(value))
.Append(')');
}

if (discriminatorValueAnnotation?.Value != null)
{
var valueConverter = FindValueConverter(discriminatorProperty);
if (valueConverter != null)
var value = discriminatorValueAnnotation.Value;
if (discriminatorProperty != null)
{
value = valueConverter.ConvertToProvider(value);
var valueConverter = FindValueConverter(discriminatorProperty);
if (valueConverter != null)
{
value = valueConverter.ConvertToProvider(value);
}
}

stringBuilder
.Append('.')
.Append("HasValue")
.Append('(')
.Append(Code.UnknownLiteral(value))
.Append(')');
}

stringBuilder
.Append('.')
.Append("HasValue")
.Append('(')
.Append(Code.UnknownLiteral(value))
.Append(')');
stringBuilder.AppendLine(";");
}

stringBuilder.AppendLine(";");
}

GenerateAnnotations(entityTypeBuilderName, entityType, stringBuilder, annotations, inChainedCall: false);
Expand Down
9 changes: 1 addition & 8 deletions test/EFCore.Design.Tests/Migrations/Design/CSharpMigrationsGeneratorTest.cs
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Expand Up @@ -134,14 +134,7 @@ public void Test_new_annotations_handled_for_entity_types()
},
{
CoreAnnotationNames.DiscriminatorValue, ("MyDiscriminatorValue",
_toTable
+ ";"
+ _nl
+ _nl
+ "entityTypeBuilder.HasDiscriminator"
+ "()."
+ nameof(DiscriminatorBuilder.HasValue)
+ @"(""MyDiscriminatorValue"")")
_toTable)
},
{
RelationalAnnotationNames.Comment, ("My Comment",
Expand Down
113 changes: 106 additions & 7 deletions test/EFCore.Design.Tests/Migrations/ModelSnapshotSqlServerTest.cs
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Expand Up @@ -999,6 +999,105 @@ protected override void BuildModel(ModelBuilder modelBuilder)
Assert.Null(humanPetType.GetViewName());
});

[ConditionalFact] // Issue #33605
public virtual void Abstract_base_class_with_TPT()
=> Test(
builder =>
{
builder.Entity<Cat>().ToTable("Cats");
builder.Entity<Dog>().ToTable("Dogs");
builder.Entity<Animal>();
builder.Ignore<Human>();
builder.Ignore<Pet>();
builder.Ignore<Animal>();
},
"""
// <auto-generated />
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Metadata;
using Microsoft.EntityFrameworkCore.Storage.ValueConversion;

#nullable disable

namespace RootNamespace
{
[DbContext(typeof(DbContext))]
partial class Snapshot : ModelSnapshot
{
protected override void BuildModel(ModelBuilder modelBuilder)
{
#pragma warning disable 612, 618
modelBuilder
.HasDefaultSchema("DefaultSchema")
.HasAnnotation("Relational:MaxIdentifierLength", 128);

SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);

modelBuilder.Entity("Microsoft.EntityFrameworkCore.Migrations.ModelSnapshotSqlServerTest+Cat", b =>
{
b.Property<int>("Id")
.ValueGeneratedOnAdd()
.HasColumnType("int");

SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));

b.Property<string>("EducationLevel")
.HasColumnType("nvarchar(max)");

b.Property<string>("Name")
.HasColumnType("nvarchar(max)");

b.Property<string>("Vet")
.HasColumnType("nvarchar(max)");

b.HasKey("Id");

b.ToTable("Cats", "DefaultSchema");
});

modelBuilder.Entity("Microsoft.EntityFrameworkCore.Migrations.ModelSnapshotSqlServerTest+Dog", b =>
{
b.Property<int>("Id")
.ValueGeneratedOnAdd()
.HasColumnType("int");

SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));

b.Property<string>("FavoriteToy")
.HasColumnType("nvarchar(max)");

b.Property<string>("Name")
.HasColumnType("nvarchar(max)");

b.Property<string>("Vet")
.HasColumnType("nvarchar(max)");

b.HasKey("Id");

b.ToTable("Dogs", "DefaultSchema");
});
#pragma warning restore 612, 618
}
}
}

""",
model =>
{
Assert.Equal(5, model.GetAnnotations().Count());
Assert.Equal(2, model.GetEntityTypes().Count());

var catType = model.FindEntityType("Microsoft.EntityFrameworkCore.Migrations.ModelSnapshotSqlServerTest+Cat");
Assert.Equal("Cats", catType.GetTableName());
Assert.Null(catType.GetViewName());
Assert.Null(catType.FindProperty("Discriminator"));

var dogType = model.FindEntityType("Microsoft.EntityFrameworkCore.Migrations.ModelSnapshotSqlServerTest+Dog");
Assert.Equal("Dogs", dogType.GetTableName());
Assert.Null(dogType.GetViewName());
});

[ConditionalFact]
public virtual void Entity_splitting_is_stored_in_snapshot_with_tables()
=> Test(
Expand Down Expand Up @@ -1678,7 +1777,7 @@ public virtual void CheckConstraint_is_only_stored_in_snapshot_once_for_TPH()

b.ToTable("BaseEntity", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").HasValue("BaseEntity");
b.HasDiscriminator().HasValue("BaseEntity");

b.UseTphMappingStrategy();
});
Expand Down Expand Up @@ -2011,7 +2110,7 @@ public virtual void BaseType_is_stored_in_snapshot()

b.ToTable("BaseEntity", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").HasValue("BaseEntity");
b.HasDiscriminator().HasValue("BaseEntity");

b.UseTphMappingStrategy();
});
Expand Down Expand Up @@ -2082,7 +2181,7 @@ public virtual void Discriminator_annotations_are_stored_in_snapshot()

b.ToTable("BaseEntity", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").IsComplete(true).HasValue("BaseEntity");
b.HasDiscriminator().IsComplete(true).HasValue("BaseEntity");

b.UseTphMappingStrategy();
});
Expand Down Expand Up @@ -2158,7 +2257,7 @@ public virtual void Converted_discriminator_annotations_are_stored_in_snapshot()

b.ToTable("BaseEntityWithStructDiscriminator", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").IsComplete(true).HasValue("Base");
b.HasDiscriminator().IsComplete(true).HasValue("Base");

b.UseTphMappingStrategy();
});
Expand Down Expand Up @@ -4614,7 +4713,7 @@ public virtual void Property_column_name_is_stored_in_snapshot_when_DefaultColum

b.ToTable("BarBase", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").HasValue("BarBase");
b.HasDiscriminator().HasValue("BarBase");

b.UseTphMappingStrategy();
});
Expand Down Expand Up @@ -4830,7 +4929,7 @@ public virtual void Property_column_name_on_specific_table_is_stored_in_snapshot

b.ToTable("BaseEntity", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").HasValue("BaseEntity");
b.HasDiscriminator().HasValue("BaseEntity");

b.UseTphMappingStrategy();
});
Expand Down Expand Up @@ -7090,7 +7189,7 @@ public virtual void Do_not_generate_entity_type_builder_again_if_no_foreign_key_

b.ToTable("BaseType", "DefaultSchema");

b.HasDiscriminator<string>("Discriminator").HasValue("BaseType");
b.HasDiscriminator().HasValue("BaseType");

b.UseTphMappingStrategy();
});
Expand Down