How to Deserialize a list of objects from json in flutter

by

Well, your service would handle either the response body being a map, or a list of maps accordingly. Based on the code you have, you are accounting for 1 item.

If the response body is iterable, then you need to parse and walk accordingly, if I am understanding your question correctly.

Example:

Iterable l = json.decode(response.body);
List<Post> posts = List<Post>.from(l.map((model)=> Post.fromJson(model)));

where the post is a LIST of posts.

EDIT: I wanted to add a note of clarity here. The purpose here is that you decode the response returned. The next step, is to turn that iterable of JSON objects into an instance of your object. This is done by creating fromJson methods in your class to properly take JSON and implement it accordingly. Below is a sample implementation.

class Post {
  // Other functions and properties relevant to the class
  // ......
  /// Json is a Map<dynamic,dynamic> if i recall correctly.
  static fromJson(json): Post {
    Post p = new Post()
    p.name = ...
    return p
  }
}

I am a bit abstracted from Dart these days in favor of a better utility for the tasks needing to be accomplished. So my syntax is likely off just a little, but this is Pseudocode.

More Related Contents:

  1. How to call nested json data using API in flutter?
  2. Unhandled Exception: InternalLinkedHashMap’ is not a subtype of type ‘List
  3. Flutter Registration with API
  4. Error in searching data using listview in flutter
  5. How to decode JSON in Flutter?
  6. HTTP POST with Json on Body – Flutter/Dart
  7. How to read local json import in flutter?
  8. Add JSON serializer to every model class?
  9. Flutter FormatException: Unexpected character (at character 1)
  10. Error: List is not a subtype of type Map
  11. How to parse json in flutter?
  12. Converting object to an encodable object failed
  13. What are the differences between JSON and JSONP?
  14. Convert Dictionary to JSON in Swift
  15. Importing local json file using d3.json does not work
  16. JSON Invalid UTF-8 middle byte
  17. how to solve flutter CERTIFICATE_VERIFY_FAILED error while performing a POST request?
  18. How to parse JSON in Scala using standard Scala classes?
  19. JSON to TypeScript class instance? [duplicate]
  20. When should I use a FutureBuilder?
  21. Returning Null JSON Throwing Type Mismatch Error in VBA
  22. How to remove scroll glow?
  23. How to take a screenshot of the current widget – Flutter
  24. How to build signed apk from Android Studio for Flutter
  25. Flutter image preload
  26. Spring MVC – HttpMediaTypeNotAcceptableException
  27. Iterating through a list to render multiple widgets in Flutter?
  28. How to convert a JSON object to key=value format in jq?
  29. Read multiline JSON in Apache Spark
  30. Flutter command not found

Leave a Comment