错误：无法弄清楚如何将该字段保存到数据库中？

Question

我正在开发android系统，我已经实现了空间并从构建中获取了多个错误

below errors
You can consider adding a type converter for it.
error: Cannot figure out how to save this field into database. You can consider adding a type converter for it.
error: cannot find symbol class DaggerBBCSportFragmentComponent

Room cannot create an SQLite connection to verify the queries. Query verification will be disabled. Error: [SQLITE_ERROR] SQL error

     

或缺少数据库（仅允许在INTEGER上使用AUTOTOCR   主键）
      模式导出目录未提供给注释处理器，因此我们无法导出模式。您可以提供   room.schemaLocation注解处理器参数或设置   exportSchema为false。

Article.java模型类下方

@Entity
public class Article {
    @PrimaryKey(autoGenerate = true)
    @SerializedName("source")
    @Expose
    private Source source;
    @SerializedName("author")
    @Expose
    @ColumnInfo(name = "author")
    private String author;
    @SerializedName("title")
    @Expose
    @ColumnInfo(name = "title")
    private String title;
    @SerializedName("description")
    @Expose
    @ColumnInfo(name = "description")
    private String description;
    @SerializedName("url")
    @Expose
    @ColumnInfo(name = "url")
    private String url;
    @SerializedName("urlToImage")
    @Expose
    @ColumnInfo(name = "urlToImage")
    private String urlToImage;

    @SerializedName("publishedAt")
    @Expose
    @ColumnInfo(name = "publishedAt")
    private String publishedAt;
    @SerializedName("content")
    @Expose
    @ColumnInfo(name = "content")
    private String content;

    public Source getSource() {
        return source;
    }

    public void setSource(Source source) {
        this.source = source;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUrlToImage() {
        return urlToImage;
    }

    public void setUrlToImage(String urlToImage) {
        this.urlToImage = urlToImage;
    }

    public String getPublishedAt() {
        return publishedAt;
    }

    public void setPublishedAt(String publishedAt) {
        this.publishedAt = publishedAt;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

}

below database class
Database(entities = {Article.class}, version = 1)
public abstract class SportNewsDatabase extends RoomDatabase {

    public abstract SportNewsDao databaseInterface();

    @Override
    protected SupportSQLiteOpenHelper createOpenHelper(DatabaseConfiguration config) {
        return null;
    }

    @Override
    protected InvalidationTracker createInvalidationTracker() {
        return null;
    }
}

below BBCSportNewsFragment

public class BBCSportFragment extends Fragment implements ArticleAdapter.ClickListener {

    public List<Article> articleList = new ArrayList<>();
    @ActivityContext
    public Context activityContext;
    @ApplicationContext
    public Context mContext;

    @BindView(R.id.recycler_view)
    RecyclerView recyclerView;
    BBCSportFragmentComponent bbcSportFragmentComponent;
    BBCFragmentContextModule bbcFragmentContextModule;
    private SportNews sportNews;
    private ArticleAdapter articleAdapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_bbcsport, container, false);
        Activity activity = getActivity();
        ButterKnife.bind(this, view);
        SportInterface sportInterface = SportClient.getApiService();
        Call<SportNews> call = sportInterface.getArticles();
        call.enqueue(new Callback<SportNews>() {
            @Override
            public void onResponse(Call<SportNews> call, Response<SportNews> response) {
                sportNews = response.body();
                if (sportNews != null && sportNews.getArticles() != null) {
                    articleList.addAll(sportNews.getArticles());
                }
                articleAdapter = new ArticleAdapter(articleList, sportNews);
                ApplicationComponent applicationComponent = MyApplication.get(Objects.requireNonNull(activity)).getApplicationComponent();
                // bbcSportFragmentComponent = (BBCSportFragmentComponent) DaggerApplicationComponent.builder().contextModule(new ContextModule(getContext())).build();
                bbcSportFragmentComponent = (BBCSportFragmentComponent) DaggerBBCSportFragmentComponent.builder().applicationComponent(applicationComponent).build();
                bbcSportFragmentComponent.injectBBCSportFragment(BBCSportFragment.this);
                RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
                recyclerView.setLayoutManager(layoutManager);
                recyclerView.setAdapter(articleAdapter);
            }

            @Override
            public void onFailure(Call<SportNews> call, Throwable t) {
                Log.e("Error", "error");
            }
        });


        return view;


    }

}


below Dao class
@Dao
public interface SportNewsDao {

    @Query("SELECT * FROM article")
    List<Article> getArticles();

    @Insert
    void insertAll(Article... article);

}