// We cannot use regular access thru EntitySession - db info/version loads at the very start of connecting to db;
// the entity app is not ready yet (schema not updated, etc).
public DbVersionInfo LoadDbInfo(DbSettings settings, string appName, Vita.Data.Driver.DbModelLoader loader)
{
var thisSchema = settings.ModelConfig.GetSchema(this.Area);
var prefix = settings.ModelConfig.Options.IsSet(DbOptions.AddSchemaToTableNames) ? thisSchema + "_" : string.Empty;
var dbInfoName = prefix + "DbInfo";
var dbModuleInfoName = prefix + "DbModuleInfo";
if (!loader.TableExists(thisSchema, dbInfoName))
{
return(null);
}
try {
var dbInfo = new DbVersionInfo();
var sql = settings.Driver.GetDirectSelectAllSql(thisSchema, dbInfoName);
var dt = loader.ExecuteSelect(sql);
var appRow = dt.FindRow("AppName", appName);
if (appRow != null)
{
dbInfo.InstanceType = (DbInstanceType)appRow.GetAsInt("InstanceType");
var strVersion = appRow.GetAsString("Version");
Version dbVersion;
if (Version.TryParse(strVersion, out dbVersion))
{
dbInfo.Version = dbVersion;
}
// 'Values' column appears in v 1.1
if (dt.HasColumn("Values"))
{
var strValues = appRow.GetAsString("Values");
DeserializeValues(dbInfo, strValues);
}
} //if appRow
//Read modules
sql = settings.Driver.GetDirectSelectAllSql(thisSchema, dbModuleInfoName);
dt = loader.ExecuteSelect(sql);
foreach (DbRow row in dt.Rows)
{
var moduleName = row.GetAsString("ModuleName");
var schema = row.GetAsString("Schema");
var strModuleVersion = row.GetAsString("Version");
Version v;
if (!Version.TryParse(strModuleVersion, out v))
{
v = null;
}
dbInfo.Modules.Add(new ModuleDbVersionInfo(schema, moduleName, v));
}
return(dbInfo);
} catch (Exception ex) {
Trace.WriteLine("Failed to load DbInfo record: " + ex.ToLogString());
//Debugger.Break();
return(null);
}
} //method
public DbVersionInfo LoadDbVersionInfo(DbModelLoader loader)
{
var infoProvider = _database.Settings.DbInfoProvider;
if (infoProvider == null)
return null;
var versionInfo = infoProvider.LoadDbInfo(_database.Settings, _app.AppName, loader);
loader.VersionInfo = versionInfo;
return versionInfo;
}