为啥我不能将数据从 RecyclerView 传递到另一个 RecyclerView - AndroidX

Posted 2023-03-30

【中文标题】为啥我不能将数据从 RecyclerView 传递到另一个 RecyclerView - AndroidX

【英文标题】：Why I cannot pass data from RecyclerView to another RecyclerView - AndroidX为什么我不能将数据从 RecyclerView 传递到另一个 RecyclerView - AndroidX

【发布时间】：2020-02-09 12:19:50

【问题描述】：

我想让 RecyclerView1 Activity1 中的数据可以传递给 RecyclerView2 Activity2

//SectionAdapter.java

public class AdapterSectionHotTrendingNews extends RecyclerView.Adapter

private Context mContext;
private ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews;

public AdapterSectionHotTrendingNews(Context mContext, ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews) 
    this.mContext = mContext;
    this.modelSectionHotTrendingNews = modelSectionHotTrendingNews;


@Override
        public SectionHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) 
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_section_hottrendingnews, null);
    return new SectionHotTrendingNewsViewHolder(v);


@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) 

    final SectionHotTrendingNewsViewHolder sectionHotTrendingNewsViewHolder = (SectionHotTrendingNewsViewHolder) holder;
    ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);

    //Set
    sectionHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());

    ArrayList singleSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();
    /*AdapterSingleHotLatestNews.RecyclerViewClickListener listenerLatestNews;
    listenerLatestNews = new AdapterSingleHotLatestNews.RecyclerViewClickListener() 
        @Override
        public void onRowHotLatestNewsClick(View view, int position) 

        

        @Override
        public void onIconHotLatestNewsClick(View view, int position) 

        
    ;*/
    AdapterSingleHotTrendingNews itemListDataAdapter = new AdapterSingleHotTrendingNews(mContext, singleSectionItems);

    /*itemRowHolder.recycler_view_list.setOnTouchListener(new View.OnTouchListener() 
        @Override
        public boolean onTouch(View v, MotionEvent event) 
            int action = event.getAction();
            switch (action) 
                case MotionEvent.ACTION_DOWN:
                    // Disallow ScrollView to intercept touch events.
                    v.getParent().requestDisallowInterceptTouchEvent(true);
                    break;
                case MotionEvent.ACTION_UP:
                    //Allow ScrollView to intercept touch events once again.
                    v.getParent().requestDisallowInterceptTouchEvent(false);
                    break;
            
            // Handle RecyclerView touch events.
            v.onTouchEvent(event);
            return true;
        
    );*/


    sectionHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
            new View.OnClickListener()  @Override public void onClick(View v) 
                Intent intent = new Intent(mContext, TabMoreHotActivity.class);
                // here you create put extra in new intent not the intent that you created

                intent.putExtra("MoreNews", modelSectionHotTrendingNews.get(position).getAllItemsInSection());
                mContext.startActivity(intent);

             );




    /*Glide.with(mContext)
            .load(feedItem.getImageURL())
            .diskCacheStrategy(DiskCacheStrategy.ALL)
            .centerCrop()
            .error(R.drawable.bg)
            .into(feedListRowHolder.thumbView);*/

    //SetRecyclerView
    sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setHasFixedSize(true);
    sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
    sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setAdapter(itemListDataAdapter);
    sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setNestedScrollingEnabled(false);


@Override
public int getItemCount() 
    int itemCount = modelSectionHotTrendingNews.size();
    return itemCount;


public class SectionHotTrendingNewsViewHolder extends RecyclerView.ViewHolder 

    protected TextView TVSectionTitle;
    protected ImageView BTNHotTrendingNewsMore;
    protected RecyclerView RecyclerViewSectionHotTrendingNews;
    protected RecyclerView RecyclerViewMoreSectionHotTrendingNews;

    public SectionHotTrendingNewsViewHolder(View itemView) 
        super(itemView);

        TVSectionTitle = (TextView) itemView.findViewById(R.id.TV_SectionTitle);
        BTNHotTrendingNewsMore= (ImageView) itemView.findViewById(R.id.BTN_HotTrendingNewsMore);
        RecyclerViewSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerView_Section_HotTrendingNews);
        RecyclerViewMoreSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerViewMore_Section_HotTrendingNews);
    

//SingleAdapter.java

public class AdapterSingleHotTrendingNews extends RecyclerView.Adapter

private Context mContext;
private ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews;

public AdapterSingleHotTrendingNews(Context mContext, ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews) 
    this.mContext = mContext;
    this.modelSingleHotTrendingNews = modelSingleHotTrendingNews;


//Container
@Override
public SingleHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) 
    View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_single_hottrendingnews, null);
    return new SingleHotTrendingNewsViewHolder(v);


//Fill Container with Model Setter Getter
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) 

    final SingleHotTrendingNewsViewHolder singleHotTrendingNewsViewHolder = (SingleHotTrendingNewsViewHolder) holder;
    final ModelSingleHotTrendingNews modelSingleHotTrendingNewsX = modelSingleHotTrendingNews.get(position);

    //Set
    singleHotTrendingNewsViewHolder.TVGameDate.setText(modelSingleHotTrendingNewsX.getGamedate());
    singleHotTrendingNewsViewHolder.TVGameDescription.setText(modelSingleHotTrendingNewsX.getGamedescription());
    singleHotTrendingNewsViewHolder.IMGGameImage.setImageResource(modelSingleHotTrendingNewsX.getGameimage());



    singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 

            final Boolean booltrendingnewssaving = modelSingleHotTrendingNewsX.getTrendingnewssaving();

            final int id = modelSingleHotTrendingNewsX.getId();

            if (booltrendingnewssaving == true)
                Toast.makeText(v.getContext(), "Turn Off Saved News " + id, Toast.LENGTH_SHORT).show();
                singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_off);
                modelSingleHotTrendingNewsX.setTrendingnewssaving(false);
                /*updateSavedNewsSaving("update_newssaving", id, false);*/
             else if(booltrendingnewssaving == false) 
                Toast.makeText(v.getContext(), "Turn On Saved News " + id, Toast.LENGTH_SHORT).show();
                singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_on);
                modelSingleHotTrendingNewsX.setTrendingnewssaving(true);
                /*updateSavedNewsSaving("update_newssaving", id, true);*/
            
        
    );



   /* Glide.with(mContext)
            .load(feedItem.getImageURL())
            .diskCacheStrategy(DiskCacheStrategy.ALL)
            .centerCrop()
            .error(R.drawable.bg)
            .into(feedListRowHolder.thumbView);*/

    singleHotTrendingNewsViewHolder.ROWHotTrendingNewsContainer.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 
            Toast.makeText(v.getContext(), modelSingleHotTrendingNews.get(position).getGamedescription(), Toast.LENGTH_SHORT).show();

            //Passing Data to GameDescriptionActivity
            Intent intent = new Intent(mContext, GameDetailActivity.class);
            intent.putExtra("ImagePKG",  modelSingleHotTrendingNews.get(position).getGameimage());
            intent.putExtra("NamePKG",  modelSingleHotTrendingNews.get(position).getGamedate());
            intent.putExtra("UrlPKG",  modelSingleHotTrendingNews.get(position).getId());
            intent.putExtra("DescriptionPKG",  modelSingleHotTrendingNews.get(position).getGamedescription());
            mContext.startActivity(intent);
        
    );


@Override
public int getItemCount() 
    int itemCount = modelSingleHotTrendingNews.size();
    return itemCount;


public class SingleHotTrendingNewsViewHolder extends RecyclerView.ViewHolder
    TextView TVGameDate;
    TextView TVGameDescription;
    ImageView IMGGameImage;

    ImageView ICONHotTrendingNewsSaving;
    private RelativeLayout ROWHotTrendingNewsContainer;


    public SingleHotTrendingNewsViewHolder(View itemView) 
        super(itemView);

        TVGameDate = itemView.findViewById(R.id.TV_GameDate);
        TVGameDescription = itemView.findViewById(R.id.TV_GameDescription);
        IMGGameImage = itemView.findViewById(R.id.IMG_GameImage);

        ICONHotTrendingNewsSaving = itemView.findViewById(R.id.ICON_HotTrendingNewsSaving);
        ROWHotTrendingNewsContainer = itemView.findViewById(R.id.ROW_HotTrendingNewsContainer);
    

//ModelSection.java

public class ModelSectionHotTrendingNews implements Serializable 

private String headerTitle;
private ArrayList<ModelSingleHotTrendingNews> allItemsInSection;

public ModelSectionHotTrendingNews() 


public String getHeaderTitle() 
    return headerTitle;


public void setHeaderTitle(String headerTitle) 
    this.headerTitle = headerTitle;


public ArrayList<ModelSingleHotTrendingNews> getAllItemsInSection() 
    return allItemsInSection;


public void setAllItemsInSection(ArrayList<ModelSingleHotTrendingNews> allItemsInSection) 
    this.allItemsInSection = allItemsInSection;

//ModelSingle.java

public class ModelSingleHotTrendingNews implements Serializable 

private int id;
private String gamedate;
private String gamedescription;
private int gameimage;

private Boolean trendingnewssaving;
private String value;
private String message;

public ModelSingleHotTrendingNews(int id, String gamedate, String gamedescription, int gameimage, Boolean trendingnewssaving, String value, String message) 
    this.id = id;
    this.gamedate = gamedate;
    this.gamedescription = gamedescription;
    this.gameimage = gameimage;
    this.trendingnewssaving = trendingnewssaving;
    this.value = value;
    this.message = message;


public int getId() 
    return id;


public void setId(int id) 
    this.id = id;


public String getGamedate() 
    return gamedate;


public void setGamedate(String gamedate) 
    this.gamedate = gamedate;


public String getGamedescription() 
    return gamedescription;


public void setGamedescription(String gamedescription) 
    this.gamedescription = gamedescription;


public int getGameimage() 
    return gameimage;


public void setGameimage(int gameimage) 
    this.gameimage = gameimage;


public Boolean getTrendingnewssaving() 
    return trendingnewssaving;


public void setTrendingnewssaving(Boolean trendingnewssaving) 
    this.trendingnewssaving = trendingnewssaving;


public String getValue() 
    return value;


public void setValue(String value) 
    this.value = value;


public String getMessage() 
    return message;


public void setMessage(String message) 
    this.message = message;

//AdapterMoreSection.java

public class AdapterMoreSectionHotTrendingNews extends RecyclerView.Adapter 

private Context mContext;
private ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews;

public AdapterMoreSectionHotTrendingNews(Context mContext, ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews) 
    this.mContext = mContext;
    this.modelSectionHotTrendingNews = modelSectionHotTrendingNews;


@Override
public SectionMoreHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) 
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.itemmore_section_hottrendingnews, null);
    return new SectionMoreHotTrendingNewsViewHolder(v);



@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) 

    final SectionMoreHotTrendingNewsViewHolder sectionMoreHotTrendingNewsViewHolder = (SectionMoreHotTrendingNewsViewHolder) holder;
    ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);

    //Set
    sectionMoreHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());
    ArrayList singleMoreSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();

    /*AdapterSingleHotLatestNews.RecyclerViewClickListener listenerLatestNews;
    listenerLatestNews = new AdapterSingleHotLatestNews.RecyclerViewClickListener() 
        @Override
        public void onRowHotLatestNewsClick(View view, int position) 

        

        @Override
        public void onIconHotLatestNewsClick(View view, int position) 

        
    ;*/
    AdapterMoreSingleHotTrendingNews itemListDataAdapter = new AdapterMoreSingleHotTrendingNews(mContext, singleMoreSectionItems);

    /*itemRowHolder.recycler_view_list.setOnTouchListener(new View.OnTouchListener() 
        @Override
        public boolean onTouch(View v, MotionEvent event) 
            int action = event.getAction();
            switch (action) 
                case MotionEvent.ACTION_DOWN:
                    // Disallow ScrollView to intercept touch events.
                    v.getParent().requestDisallowInterceptTouchEvent(true);
                    break;
                case MotionEvent.ACTION_UP:
                    //Allow ScrollView to intercept touch events once again.
                    v.getParent().requestDisallowInterceptTouchEvent(false);
                    break;
            
            // Handle RecyclerView touch events.
            v.onTouchEvent(event);
            return true;
        
    );*/


    final String sectionTitle = modelSectionHotTrendingNewsX.getHeaderTitle();
    sectionMoreHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
            new View.OnClickListener() 
                @Override public void onClick(View v) 
                    //More IN RecyclerViewMore
                
            );


    /*Glide.with(mContext)
            .load(feedItem.getImageURL())
            .diskCacheStrategy(DiskCacheStrategy.ALL)
            .centerCrop()
            .error(R.drawable.bg)
            .into(feedListRowHolder.thumbView);*/

    //SetRecyclerView
    sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setHasFixedSize(true);
    sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
    sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setAdapter(itemListDataAdapter);
    sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setNestedScrollingEnabled(false);


@Override
public int getItemCount() 
    int itemCount = modelSectionHotTrendingNews.size();
    return itemCount;


public class SectionMoreHotTrendingNewsViewHolder extends RecyclerView.ViewHolder 

    protected TextView TVSectionTitle;
    protected ImageView BTNHotTrendingNewsMore;
    protected RecyclerView RecyclerViewMoreSectionHotTrendingNews;

    public SectionMoreHotTrendingNewsViewHolder(View itemView) 
        super(itemView);

        TVSectionTitle = (TextView) itemView.findViewById(R.id.TV_SectionTitle);
        BTNHotTrendingNewsMore= (ImageView) itemView.findViewById(R.id.BTN_HotTrendingNewsMore);
        RecyclerViewMoreSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerViewMore_Section_HotTrendingNews);
    

//AdapterMoreSingle.java

public class AdapterMoreSingleHotTrendingNews extends RecyclerView.Adapter

private Context mContext;
private ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews;

public AdapterMoreSingleHotTrendingNews(Context mContext, ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews) 
    this.mContext = mContext;
    this.modelSingleHotTrendingNews = modelSingleHotTrendingNews;


//Container
@Override
public SingleMoreHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) 
    View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.itemmore_single_hottrendingnews, null);
    return new SingleMoreHotTrendingNewsViewHolder(v);


//Fill Container with Model Setter Getter
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) 

    final SingleMoreHotTrendingNewsViewHolder singleMoreHotTrendingNewsViewHolder = (SingleMoreHotTrendingNewsViewHolder) holder;
    final ModelSingleHotTrendingNews modelSingleHotTrendingNewsX = modelSingleHotTrendingNews.get(position);

    //Set
    singleMoreHotTrendingNewsViewHolder.TVGameDate.setText(modelSingleHotTrendingNewsX.getGamedate());
    singleMoreHotTrendingNewsViewHolder.TVGameDescription.setText(modelSingleHotTrendingNewsX.getGamedescription());
    singleMoreHotTrendingNewsViewHolder.IMGGameImage.setImageResource(modelSingleHotTrendingNewsX.getGameimage());



    singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 

            final Boolean booltrendingnewssaving = modelSingleHotTrendingNewsX.getTrendingnewssaving();

            final int id = modelSingleHotTrendingNewsX.getId();

            if (booltrendingnewssaving == true)
                Toast.makeText(v.getContext(), "Turn Off Saved News " + id, Toast.LENGTH_SHORT).show();
                singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_off);
                modelSingleHotTrendingNewsX.setTrendingnewssaving(false);
                /*updateSavedNewsSaving("update_newssaving", id, false);*/
             else if(booltrendingnewssaving == false) 
                Toast.makeText(v.getContext(), "Turn On Saved News " + id, Toast.LENGTH_SHORT).show();
                singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_on);
                modelSingleHotTrendingNewsX.setTrendingnewssaving(true);
                /*updateSavedNewsSaving("update_newssaving", id, true);*/
            
        
    );



   /* Glide.with(mContext)
            .load(feedItem.getImageURL())
            .diskCacheStrategy(DiskCacheStrategy.ALL)
            .centerCrop()
            .error(R.drawable.bg)
            .into(feedListRowHolder.thumbView);*/

    singleMoreHotTrendingNewsViewHolder.ROWHotTrendingNewsContainer.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 
            Toast.makeText(v.getContext(), modelSingleHotTrendingNews.get(position).getGamedescription(), Toast.LENGTH_SHORT).show();

            //Passing Data to GameDescriptionActivity
            Intent intent = new Intent(mContext, GameDetailActivity.class);
            intent.putExtra("ImagePKG",  modelSingleHotTrendingNews.get(position).getGameimage());
            intent.putExtra("NamePKG",  modelSingleHotTrendingNews.get(position).getGamedate());
            intent.putExtra("UrlPKG",  modelSingleHotTrendingNews.get(position).getId());
            intent.putExtra("DescriptionPKG",  modelSingleHotTrendingNews.get(position).getGamedescription());
            mContext.startActivity(intent);
        
    );


@Override
public int getItemCount() 
    int itemCount = modelSingleHotTrendingNews.size();
    return itemCount;


public class SingleMoreHotTrendingNewsViewHolder extends RecyclerView.ViewHolder
    TextView TVGameDate;
    TextView TVGameDescription;
    ImageView IMGGameImage;

    ImageView ICONHotTrendingNewsSaving;
    private RelativeLayout ROWHotTrendingNewsContainer;


    public SingleMoreHotTrendingNewsViewHolder(View itemView) 
        super(itemView);

        TVGameDate = itemView.findViewById(R.id.TV_GameDate);
        TVGameDescription = itemView.findViewById(R.id.TV_GameDescription);
        IMGGameImage = itemView.findViewById(R.id.IMG_GameImage);

        ICONHotTrendingNewsSaving = itemView.findViewById(R.id.ICON_HotTrendingNewsSaving);
        ROWHotTrendingNewsContainer = itemView.findViewById(R.id.ROW_HotTrendingNewsContainer);
    

//Activity2More.java

public class TabMoreHotActivity extends AppCompatActivity 



@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragmentmore_tabhot);

    AdapterMoreSectionHotTrendingNews adapterMoreSectionHotTrendingNews;
    ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews = new ArrayList<>();
    Bundle bundle = getIntent().getExtras();
    if(bundle!=null)
    
        modelSectionHotTrendingNews = (ArrayList<ModelSectionHotTrendingNews>) bundle.getSerializable("MoreNews");
    


    //1
    RecyclerView RecyclerViewMoreSingleHotTrendingNews = findViewById(R.id.RecyclerViewMore_Single_HotTrendingNews);
    RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
    adapterMoreSectionHotTrendingNews = new AdapterMoreSectionHotTrendingNews(this, modelSectionHotTrendingNews);

    RecyclerViewMoreSingleHotTrendingNews.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
    RecyclerViewMoreSingleHotTrendingNews.setAdapter(adapterMoreSectionHotTrendingNews);




    //Optimized
    RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
    RecyclerViewMoreSingleHotTrendingNews.setItemViewCacheSize(20);

//错误

Process: com.indofun.android.indojoy, PID: 18827
java.lang.ClassCastException: com.indofun.android.indojoy.Models.Model_HotTrendingNews.ModelSingleHotTrendingNews cannot be cast to com.indofun.android.indojoy.Models.Model_HotTrendingNews.ModelSectionHotTrendingNews
    at com.indofun.android.indojoy.Adapters.AdapterMore_HotTrendingNews.AdapterMoreSectionHotTrendingNews.onBindViewHolder(AdapterMoreSectionHotTrendingNews.java:39)

//注意 //RecyclerView1使用AdapterSection.java,AdapterSingle.java,ModelSection.java,ModelSingle.java //RecyclerView2使用AdapterMoreSection.java,AdapterMoreSingle.java,ModelSection.java,ModelSingle.java

【参考方案1】：

在TabMoreHotActivity里面这样使用：

    ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews = new ArrayList<>(); 
    Bundle bundle = getIntent().getExtras();

    if(bundle!=null  
        modelSingleHotTrendingNews = ArrayList<ModelSingleHotTrendingNews>) bundle.getSerializable("MoreNews");
    

【讨论】：

我在那儿告诉过你解决方案：***.com/a/58318457/2637449。当您相应地更改代码时，您应该在那里接受答案。此外，您在那里投错了模型，这就是为什么这里出现此异常。

将两个答案都标记为已接受