protected override void OnModelCreating(ModelBuilder modelBuilder)
{
SpatialEntities = new Dictionary <Type, SqlServerSpatialEntityMetadata>();
foreach (var(entity, property, geometryType) in SqlServerSpatialColumn.GetSpatialColumns(modelBuilder.Model))
{
var tableName = modelBuilder.Entity(entity.ClrType).Metadata.SqlServer().TableName;
var keyName = entity.FindPrimaryKey().Properties[0].Name;
var metadata = new SqlServerSpatialEntityMetadata(entity, tableName, keyName, property.Name, geometryType, entity.GetProperties().ToList());
SpatialEntities.Add(entity.ClrType, metadata);
var propertyBuilder = modelBuilder
.Entity(entity.Name)
.Property(property.Name);
if (propertyBuilder.Metadata.ClrType != typeof(string))
{
throw new InvalidCastException($"Field '{property.Name}' decorated with attribute '{nameof(SqlServerSpatialColumnAttribute)}' is defined as '{propertyBuilder.Metadata.ClrType.Name}' but must be defined as 'string' [{entity.Name}]");
}
propertyBuilder
.HasColumnType("geometry") // Force column to be the SQL Server spatial data type
.IsRequired(false);
propertyBuilder.Metadata.BeforeSaveBehavior = PropertySaveBehavior.Ignore;
PerformAdditionalSpatialColumnProcessing(modelBuilder, entity, property, metadata);
}
}
private void EnsureSpatialIndexExists(SqlServerSpatialEntityMetadata metadata)
{
// Ensure spatial index exists, create it if not
var spatialIndexName = $"{metadata.TableName}{metadata.GeometryFieldName}SpatialIndex";
var sql = $@"
if not exists (select 1 from sys.indexes where name = '{spatialIndexName}')
begin
create spatial index [{spatialIndexName}]
on [{metadata.TableName}]([{metadata.GeometryFieldName}])
using geometry_auto_grid
with (bounding_box = {SpatialIndexBoundingBox})
end
";
#pragma warning disable EF1000 // Possible SQL injection vulnerability.
Database.ExecuteSqlCommand(sql);
#pragma warning restore EF1000 // Possible SQL injection vulnerability.
}
protected virtual void PerformAdditionalSpatialColumnProcessing(ModelBuilder modelBuilder, IEntityType entityType, PropertyInfo property, SqlServerSpatialEntityMetadata metadata)
{
}
