/// <summary>
/// Rename the specified column in the targeted table only if the column exists.
/// <para>IMPORTANT: In Cassandra only the Primary key can be renamed.</para>
/// </summary>
///
/// <param name="self">The instance of the Cassandra Fluent Migrator helper.</param>
/// <param name="table">The table where we want to rename the column.</param>
/// <param name="old">The column to be renamed.</param>
/// <param name="target">The new column name.</param>
/// <returns>The Cassandra Fluent Migrator helper.</returns>
///
/// <exception cref="NullReferenceException">Thrown when one or all the specified arguments are invalid or null.</exception>
/// <exception cref="ObjectNotFoundException">Thrown when the table doesn't exists.</exception>
/// <exception cref="InvalidOperationException">Thrown when the Column is not a primary key or the target column name already exists.</exception>
public static async Task <ICassandraFluentMigrator> RenamePrimaryColumnAsync([NotNull] this ICassandraFluentMigrator self, [NotNull] string table, [NotNull] string old, [NotNull] string target)
{
Check.NotNull(self, $"The argument [cassandra fluent migrator object]");
Check.NotEmptyNotNull(table, $"The argument [table]");
Check.NotEmptyNotNull(old, $"The argument [old name]");
Check.NotEmptyNotNull(target, $"The argument [new name]");
table = table.NormalizeString();
old = old.NormalizeString();
target = target.NormalizeString();
if (!self.DoesColumnExists(table, old))
{
return(self);
}
if (self.DoesColumnExists(table, target))
{
throw new InvalidOperationException(AppErrorsMessages.TYPE_COLUMN_EXISTS.NormalizeString(target));
}
if (!self.IsPrimaryKey(table, old))
{
throw new InvalidOperationException(AppErrorsMessages.CAN_NOT_RENAME_NONE_PRIMARY_KEY.NormalizeString(old));
}
return(await self.ExecuteRenameColumnQueryAsync(table, old, target));
}
private static async Task <ICassandraFluentMigrator> ExecuteAddColumnAsync([NotNull] this ICassandraFluentMigrator self, [NotNull] string table, [NotNull] string column, [NotNull] string type)
{
table = table.NormalizeString();
column = column.NormalizeString();
type = type.NormalizeString();
if (self.DoesColumnExists(table, column))
{
return(self);
}
return(await self.ExecuteCreateColumnQueryAsync(table, column, type));
}
/// <summary>
/// Drops the specified column from the targeted table only if the column exists.
/// </summary>
///
/// <param name="self">The instance of the Cassandra Fluent Migrator helper.</param>
/// <param name="table">The table from which we want to delete the column.</param>
/// <param name="column">The column to be deleted.</param>
/// <returns>The table Instance.</returns>
///
/// <exception cref="NullReferenceException">Thrown when one or all the specified arguments are invalid or null.</exception>
/// <exception cref="ObjectNotFoundException">Thrown when the table doesn't exists.</exception>
public static async Task <ICassandraFluentMigrator> DropColumnAsync(this ICassandraFluentMigrator self, [NotNull] string table, [NotNull] string column)
{
Check.NotNull(self, $"The argument [cassandra fluent migrator object]");
Check.NotEmptyNotNull(table, $"The argument [{nameof(table)}]");
Check.NotEmptyNotNull(column, $"The argument [{nameof(column)}]");
table = table.NormalizeString();
column = column.NormalizeString();
if (!self.DoesColumnExists(table, column))
{
return(self);
}
return(await self.ExecuteDropColumnQueryAsync(table, column));
}
