public static void DisableChangeTracking <T>(this DataConnection ctx)
{
ctx.CheckCtCompatible();
var descriptor = ctx.MappingSchema.GetEntityDescriptor(typeof(T));
ctx.Execute(Sql.TableDisableChangeTracking(descriptor.SchemaName, descriptor.TableName));
}
public static Task DisableChangeTrackingAsync <T>(this DataConnection ctx, CancellationToken token = default)
{
ctx.CheckCtCompatible();
var descriptor = ctx.MappingSchema.GetEntityDescriptor(typeof(T));
return(ctx.ExecuteAsync(Sql.TableDisableChangeTracking(descriptor.SchemaName, descriptor.TableName), token));
}
public static void EnsureChangeTrackingEnabled <T>(this DataConnection ctx, bool trackColumnUpdate = false)
{
ctx.CheckCtCompatible();
var descriptor = ctx.MappingSchema.GetEntityDescriptor(typeof(T));
if (descriptor.InheritanceMapping.Count > 0)
{
throw new ArgumentException($"Cannot change track entities with inheritance!");
}
ctx.Execute(Sql.TableEnsureChangeTrackingEnabled(descriptor.SchemaName, descriptor.TableName, trackColumnUpdate));
}
/// <summary>
/// read change tracking items for entity type
/// </summary>
/// <param name="ctx">connection</param>
/// <param name="version">known last version</param>
/// <param name="token">cancellation</param>
/// <typeparam name="T">entity type</typeparam>
/// <returns>enumerable of changes</returns>
public static Task <IEnumerable <Changed <T> > > GetChangesAsync <T>(this DataConnection ctx, long version,
bool onlyChanges = true, CancellationToken token = default)
where T : class, new()
{
ctx.CheckCtCompatible();
var descriptor = ctx.MappingSchema.GetEntityDescriptor(typeof(T));
var(ctType, ex, map) = descriptor.GetCtTypeForEntity();
var method = _ctAsyncMethod.MakeGenericMethod(typeof(T), ctType);
var query = (Task <IEnumerable <Changed <T> > >)method.Invoke(null,
new object[] { ctx, ex, map, version, onlyChanges, token });
return(query);
}
public static string GetDatabaseName(this DataConnection ctx)
{
ctx.CheckCtCompatible();
string connectionString;
switch (ctx)
{
case var _ when ctx.Transaction != null:
connectionString = ctx.Transaction.Connection.ConnectionString;
break;
case var _ when ctx.Connection != null:
connectionString = ctx.Connection.ConnectionString;
break;
default:
connectionString = ctx.ConnectionString;
break;
}
return(new SqlConnectionStringBuilder(connectionString).InitialCatalog);
}
