Question 161698 in Flutter Question posted in
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Why isn’t ‘List‘ a subtype of ‘List‘ in Flutter?

I have a two class ShopModel and ShopInRelationshipModel and I received a nested response from supabase. Kindly help with how to convert that response to ShopInRelationshipModel object.

class ShopModel {
  final int? id;
  final int? adrnr;
  final int? industry;
  final String shop_name;
  final int? currency;

  const ShopModel({
    this.id,
    this.adrnr,
    required this.industry,
    required this.shop_name,
    required this.currency,
  });

  factory ShopModel.fromJson(Map<String, dynamic> json) {
    return ShopModel(
      id: json['id'] ?? '',
      adrnr: json['adrnr'] ?? null,
      industry: json['industry'] ?? 1,
      shop_name: json['shop_name'] ?? '',
      currency: json['currency_id'] ?? '',
    );
  }

class ShopInRelationshipModel {
  final int? id;
  final int? shop_id;
  final String? uid;
  final int relationship_type;
  final ShopModel? shop;

  const ShopInRelationshipModel({
    this.id,
    required this.shop_id,
    required this.uid,
    required this.relationship_type,
    required this.shop,
  });

  factory ShopInRelationshipModel.fromJson(Map<String, dynamic> json) {
    return ShopInRelationshipModel(
      uid: json['uid'] ?? '',
      shop_id: (json['shop_id']) ?? '',
      id: json['id'] ?? '',
      relationship_type: json['relationship_type'] ?? 1,
      shop: ShopModel.fromJson(json['shop']),
    );
  }
}

List<ShopInRelationshipModel> shopInRelationshipList;

final response = await _supabase.client
          .from('shop_relationship')
          .select('*, shop(*)')
          .eq('uid', userId);

      //convert response to list of ShopInRelationshipModel. Here the error is coming
      shopInRelationshipList =
          response.map((e) => ShopInRelationshipModel.fromJson(e)).toList();

Here is the sample response incase you need it.

response = [{id: 1, created_at: 2023-05-08T16:15:58.453985+00:00, shop_id: 11, uid: ac8ae335-2b10-47f3-8ad6-6d4c838439bf, relationship_type: 1, shop: {id: 11, created_at: 2023-05-08T16:15:34.876639+00:00, adrnr: null, industry: 1, shop_name: New Store, currency_id: 1}}, {id: 2, created_at: 2023-05-08T16:39:56+00:00, shop_id: 9, uid: ac8ae335-2b10-47f3-8ad6-6d4c838439bf, relationship_type: 1, shop: {id: 9, created_at: 2023-05-08T16:09:38.251026+00:00, adrnr: null, industry: 1, shop_name: ABC Store, currency_id: 1}}]

I am trying to convert the response from Supabase join query to ShopInRelationshipModel but I am receiving an error.

'List<dynamic>' is not a subtype of type 'List<ShopInRelationshipModel>

Kindly help with how to convert response to List<ShopInRelationshipModel> object.

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    add .cast<Model>() to the list.

    The code would look like this.

    shopInRelationshipList = response
          .map((e) => ShopInRelationshipModel.fromJson(e))
          .toList()
          .cast<ShopInRelationshipModel>();

  2. 0 
    final response = await _supabase.client
          .from('shop_relationship')
          .select('*, shop(*)')
          .eq('uid', userId);

  
      shopInRelationshipList =
          response.map<ShopInRelationshipModel>((e) => ShopInRelationshipModel.fromJson(e)).toList();
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