NoSuchMethodError ： Setter "movies=" 在 null 上被调用

Question

Future<YifyMovies> getData() async {
var res = await http.get("https://yts.lt/api/v2/list_movies.json");
var decodedJson = jsonDecode(res.body);
YifyMovies movie = YifyMovies();
movie.data.movies = [];
for (var json in decodedJson) {
movie.data.movies.add(Movies.fromJson(json));
}
return movie;
}

伊菲电影类：-

它是来自上述 API 转换的 int0 dart 的 JSON。

class YifyMovies {
String status;
String statusMessage;
Data data;
YifyMovies({this.status, this.statusMessage, this.data});
YifyMovies.fromJson(Map<String, dynamic> json) {
status = json['status'];
statusMessage = json['status_message'];
data = json['data'] != null ? new Data.fromJson(json['data']) : null;
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['status'] = this.status;
data['status_message'] = this.statusMessage;
if (this.data != null) {
data['data'] = this.data.toJson();
}
return data;
}
}
class Data {
int movieCount;
int limit;
int pageNumber;
List<Movies> movies;
Data({this.movieCount, this.limit, this.pageNumber, this.movies});
Data.fromJson(Map<String, dynamic> json) {
movieCount = json['movie_count'];
limit = json['limit'];
pageNumber = json['page_number'];
if (json['movies'] != null) {
movies = new List<Movies>();
json['movies'].forEach((v) {
movies.add(new Movies.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['movie_count'] = this.movieCount;
data['limit'] = this.limit;
data['page_number'] = this.pageNumber;
if (this.movies != null) {
data['movies'] = this.movies.map((v) => v.toJson()).toList();
}
return data;
}
}
class Movies {
int id;
String url;
String imdbCode;
String title;
String titleEnglish;
String titleLong;
String slug;
int year;
double rating;
int runtime;
List<String> genres;
String summary;
String descriptionFull;
String synopsis;
String ytTrailerCode;
String language;
String mpaRating;
String backgroundImage;
String backgroundImageOriginal;
String smallCoverImage;
String mediumCoverImage;
String largeCoverImage;
String state;
List<Torrents> torrents;
String dateUploaded;
int dateUploadedUnix;
Movies(
{this.id,
this.url,
this.imdbCode,
this.title,
this.titleEnglish,
this.titleLong,
this.slug,
this.year,
this.rating,
this.runtime,
this.genres,
this.summary,
this.descriptionFull,
this.synopsis,
this.ytTrailerCode,
this.language,
this.mpaRating,
this.backgroundImage,
this.backgroundImageOriginal,
this.smallCoverImage,
this.mediumCoverImage,
this.largeCoverImage,
this.state,
this.torrents,
this.dateUploaded,
this.dateUploadedUnix});
Movies.fromJson(Map<String, dynamic> json) {
id = json['id'];
url = json['url'];
imdbCode = json['imdb_code'];
title = json['title'];
titleEnglish = json['title_english'];
titleLong = json['title_long'];
slug = json['slug'];
year = json['year'];
rating = json['rating'];
runtime = json['runtime'];
genres = json['genres'].cast<String>();
summary = json['summary'];
descriptionFull = json['description_full'];
synopsis = json['synopsis'];
ytTrailerCode = json['yt_trailer_code'];
language = json['language'];
mpaRating = json['mpa_rating'];
backgroundImage = json['background_image'];
backgroundImageOriginal = json['background_image_original'];
smallCoverImage = json['small_cover_image'];
mediumCoverImage = json['medium_cover_image'];
largeCoverImage = json['large_cover_image'];
state = json['state'];
if (json['torrents'] != null) {
torrents = new List<Torrents>();
json['torrents'].forEach((v) {
torrents.add(new Torrents.fromJson(v));
});
}
dateUploaded = json['date_uploaded'];
dateUploadedUnix = json['date_uploaded_unix'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['id'] = this.id;
data['url'] = this.url;
data['imdb_code'] = this.imdbCode;
data['title'] = this.title;
data['title_english'] = this.titleEnglish;
data['title_long'] = this.titleLong;
data['slug'] = this.slug;
data['year'] = this.year;
data['rating'] = this.rating;
data['runtime'] = this.runtime;
data['genres'] = this.genres;
data['summary'] = this.summary;
data['description_full'] = this.descriptionFull;
data['synopsis'] = this.synopsis;
data['yt_trailer_code'] = this.ytTrailerCode;
data['language'] = this.language;
data['mpa_rating'] = this.mpaRating;
data['background_image'] = this.backgroundImage;
data['background_image_original'] = this.backgroundImageOriginal;
data['small_cover_image'] = this.smallCoverImage;
data['medium_cover_image'] = this.mediumCoverImage;
data['large_cover_image'] = this.largeCoverImage;
data['state'] = this.state;
if (this.torrents != null) {
data['torrents'] = this.torrents.map((v) => v.toJson()).toList();
}
data['date_uploaded'] = this.dateUploaded;
data['date_uploaded_unix'] = this.dateUploadedUnix;
return data;
}
}
class Torrents {
String url;
String hash;
String quality;
String type;
int seeds;
int peers;
String size;
int sizeBytes;
String dateUploaded;
int dateUploadedUnix;
Torrents(
{this.url,
this.hash,
this.quality,
this.type,
this.seeds,
this.peers,
this.size,
this.sizeBytes,
this.dateUploaded,
this.dateUploadedUnix});
Torrents.fromJson(Map<String, dynamic> json) {
url = json['url'];
hash = json['hash'];
quality = json['quality'];
type = json['type'];
seeds = json['seeds'];
peers = json['peers'];
size = json['size'];
sizeBytes = json['size_bytes'];
dateUploaded = json['date_uploaded'];
dateUploadedUnix = json['date_uploaded_unix'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['url'] = this.url;
data['hash'] = this.hash;
data['quality'] = this.quality;
data['type'] = this.type;
data['seeds'] = this.seeds;
data['peers'] = this.peers;
data['size'] = this.size;
data['size_bytes'] = this.sizeBytes;
data['date_uploaded'] = this.dateUploaded;
data['date_uploaded_unix'] = this.dateUploadedUnix;
return data;
}
}

有什么帮助吗？告诉我是否需要更多信息？

我正在尝试列出所有电影并将它们用于颤振中的选项卡视图，可以在列表视图和网格视图中显示它们。我正在使用 Bloc 架构进行布局，因此 YifyMovie 类是hom_model的，上面的代码是home_provider的。

Answer 1

您的YifyMovies类已经在为您处理解析。 所以你的代码应该从

Future<YifyMovies> getData() async {
var res = await http.get("https://yts.lt/api/v2/list_movies.json");
var decodedJson = jsonDecode(res.body);
YifyMovies movie = YifyMovies();
movie.data.movies = [];
for (var json in decodedJson) {
movie.data.movies.add(Movies.fromJson(json));
}
return movie;
}

自

Future<YifyMovies> getData() async {
var res = await http.get("https://yts.lt/api/v2/list_movies.json");
var decodedJson = jsonDecode(res.body);
YifyMovies movie = YifyMovies.fromJson(decodedJson);
return movie;
}