SQLRow

Topics

Instance Properties

• var allColumns: [String]
  The list of all column names available in the row, in no particular order.

Instance Methods

• func contains(column: String) -> Bool
  Returns true if the given column name is available in the row, false otherwise.
• func decode<D>(column: String, as: D.Type) throws -> D
  If the given column name exists in the row, attempt to decode it as the given type and return the result if successful.
• func decode<D>(column: String, inferringAs: D.Type) throws -> D
  This method exists to enable the compiler to perform type inference on the generic parameter D of decode(column:as:). Protocols can not provide default arguments to methods, which is required for inference to work with generic type parameters. It is not expected that user code will invoke this method directly; rather it will be selected by the compiler automatically, as in this example:
• func decode<D>(model: D.Type, prefix: String?, keyDecodingStrategy: SQLRowDecoder.KeyDecodingStrategy, userInfo: [CodingUserInfoKey : any Sendable]) throws -> D
  Decode an entire Decodable “model” type at once, optionally applying a prefix and/or SQLRowDecoder.KeyDecodingStrategy to the type’s coding keys.
• func decode<D>(model: D.Type, with: SQLRowDecoder) throws -> D
  Decode an entire Decodable “model” type at once using an explicit SQLRowDecoder.
• func decodeNil(column: String) throws -> Bool
  Must return true if the given column name is missing from the row or if it exists but has a value equivalent to an SQL NULL, or false if the column name exists with a non-NULL value.