swift-codable

To decode JSON with mismatched field names in Swift, implement custom CodingKeys within your Codable structs to map snake_case or varying API keys directly to your Swift property names. This ensures correct parsing without manual transformation logic.

The best way to parse nested JSON structures and heterogeneous arrays in Swift is by applying robust decoding patterns with custom init(from:) initializers. This handles complex data shapes and lossy arrays safely when synthesized Codable logic is insufficient.

To handle Unix timestamps and custom dates during JSON encoding in Swift, configure JSONEncoder dateEncodingStrategy and use custom encode(to:) methods. This transforms specific date formats accurately for API integration and data flow.

Yes, you can use Swift Codable with URLSession and SwiftData composite attributes. Codable models integrate directly with URLSession API payloads and support SwiftData composite attribute storage for resilient application data flow.

JSON decoding fails when parsing lossy arrays in Swift because standard synthesized Codable expects strict type homogeneity. Implement custom decoding containers within init(from:) to skip invalid elements and prevent the entire parsing operation from failing.