/// <summary>
/// Generates FluentMigration C# files based on the views found in <see cref="schemaDumper"/>
/// </summary>
/// <param name="context">Defines how, what and where the migrations will be generated</param>
/// <param name="schemaDumper">The platform specific schema dumper instance to get view information from</param>
public void GenerateMigrations(SchemaMigrationContext context, ISchemaDumper schemaDumper)
{
_announcer.Say("Reading views");
var defs = schemaDumper.ReadViews();
SetupMigrationsDirectory(context);
//TODO: Think about adding custom sort order for view definitions as there may be
// dependancies between views.
// if ( context.CustomViewSorter != null )
// defs = context.CustomViewSorter(defs);
var migrations = 0;
foreach (var view in defs)
{
if ( context.ExcludeViews.Contains(view.Name))
{
_announcer.Say("Excluding view " + view.Name);
continue;
}
if (context.IncludeViews.Count != 0 && !context.IncludeViews.Contains(view.Name)) continue;
migrations++;
var migrationsFolder = Path.Combine(context.WorkingDirectory, context.MigrationsDirectory);
var csFilename = Path.Combine(migrationsFolder, context.MigrationViewClassNamer(context.MigrationIndex + migrations, view) + ".cs");
_announcer.Say("Creating migration " + Path.GetFileName(csFilename));
using (var writer = new StreamWriter(csFilename))
{
WriteToStream(context, view, context.MigrationIndex + migrations, writer);
}
}
context.MigrationIndex += migrations;
}
/// <summary>
/// Writes the Migration Up() and Down()
/// </summary>
/// <param name="context">The context that controls how the column should be generated</param>
/// <param name="view">the view to generate the migration for</param>
/// <param name="migration">The migration index to apply</param>
/// <param name="output">The output stream to append the C# code to</param>
private void WriteToStream(SchemaMigrationContext context, ViewDefinition view, int migration, StreamWriter output)
{
WriteMigration(output, context, migration
, () => context.MigrationViewClassNamer(migration, view)
, () => WriteView(context, view, output)
, () => WriteDeleteView(context, view, output));
}