/// <summary>
/// 在 Up/Down 方法中调用此方法来添加迁移操作。
/// </summary>
/// <param name="operation"></param>
protected void AddOperation(MigrationOperation operation)
{
this._operations.Add(operation);
}
/// <summary>
/// 把抽象的操作分发到具体的生成方法上。
/// </summary>
/// <param name="op"></param>
private void Distribute(MigrationOperation op)
{
//手工分发的原因：类并不多、可以处理类之间的继承层次关系。
if (op is CreateNormalColumn) { this.Generate(op as CreateNormalColumn); }
else if (op is DropNormalColumn) { this.Generate(op as DropNormalColumn); }
else if (op is AddPKConstraint) { this.Generate(op as AddPKConstraint); }
else if (op is RemovePKConstraint) { this.Generate(op as RemovePKConstraint); }
else if (op is AddNotNullConstraint) { this.Generate(op as AddNotNullConstraint); }
else if (op is RemoveNotNullConstraint) { this.Generate(op as RemoveNotNullConstraint); }
else if (op is AddNotNullConstraintFK) { this.Generate(op as AddNotNullConstraintFK); }
else if (op is RemoveNotNullConstraintFK) { this.Generate(op as RemoveNotNullConstraintFK); }
else if (op is AlterColumnType) { this.Generate(op as AlterColumnType); }
else if (op is AddFKConstraint) { this.Generate(op as AddFKConstraint); }
else if (op is RemoveFKConstraint) { this.Generate(op as RemoveFKConstraint); }
else if (op is CreateTable) { this.Generate(op as CreateTable); }
else if (op is DropTable) { this.Generate(op as DropTable); }
else if (op is CreateDatabase) { this.Generate(op as CreateDatabase); }
else if (op is DropDatabase) { this.Generate(op as DropDatabase); }
else if (op is RunSql) { this.Generate(op as RunSql); }
else if (op is RunAction) { this.Generate(op as RunAction); }
else { this.Generate(op); }
}
private void AddOperation(MigrationOperation operation)
{
this._operations.Add(operation);
}
protected virtual void Generate(MigrationOperation op)
{
throw new NotSupportedException();
}
private void AddOperation(MigrationOperation operation)
{
this._operations.Add(operation);
}
