/// <summary>
/// Retrieves the connection string & connection provider from application config,
/// if the app config path is set & there is a connection name.
/// </summary>
/// <param name="settings"></param>
/// <param name="connectionProvider"></param>
/// <param name="connectionString"></param>
private static void SetConnectionStringFromAppConfig(EfMigratorSettings settings, out string connectionProvider, out string connectionString)
{
var configMap = new ExeConfigurationFileMap {
ExeConfigFilename = $@"{settings.AppConfigPath}"
};
var config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);
var connectionStringSettings = config.ConnectionStrings?.ConnectionStrings[settings.ConnectionName];
if (connectionStringSettings == null)
{
throw new ArgumentException($"Unable to load connection information for connection name {settings.ConnectionName}");
}
connectionString = connectionStringSettings.ConnectionString;
connectionProvider = connectionStringSettings.ProviderName;
if (connectionString == null)
{
throw new InvalidOperationException("Unable to get connection string from app config.");
}
if (connectionProvider == null)
{
throw new InvalidOperationException("Unable to get connection provider from app config.");
}
}
public static IEfMigrator CreateEfMigrator(this ICakeContext context, EfMigratorSettings settings)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
if (settings.AssemblyPath == null)
{
throw new ArgumentNullException(nameof(settings.AssemblyPath));
}
if (settings.AppConfigPath == null)
{
throw new ArgumentNullException(nameof(settings.AppConfigPath));
}
if (settings.ConfigurationClass == null)
{
throw new ArgumentNullException(nameof(settings.ConfigurationClass));
}
if (settings.ConnectionString == null && settings.ConnectionProvider == null &&
settings.ConnectionName != null)
{
string connectionString;
string connectionProvider;
SetConnectionStringFromAppConfig(settings, out connectionProvider, out connectionString);
settings.ConnectionString = connectionString;
settings.ConnectionProvider = connectionProvider;
}
if (settings.ConnectionProvider == null)
{
throw new ArgumentNullException(nameof(settings.ConnectionProvider));
}
if (settings.ConnectionString == null)
{
throw new ArgumentNullException(nameof(settings.ConnectionString));
}
return(new EfMigrator(
settings.AssemblyPath.FullPath,
settings.ConfigurationClass,
settings.AppConfigPath.FullPath,
settings.ConnectionString,
settings.ConnectionProvider,
new CakeLogger(context.Log),
settings.AllowDataLossOnMigrations
));
}