Draggables 在拖动时组合在一起

Question

我正在使用 react-beautiful-dnd 库来启用列表的拖放功能，但我无法删除元素。有时一些可拖动的组合在一起，我不能在它们之间放置任何东西。看起来所有索引都是唯一的。为什么将项目组合在一起？任何帮助将不胜感激。

Link to image of drag behavior

这些是我在 DragDropContext 中使用的三个 React 组件的渲染方法

Cookbook.js
...

render(){
    console.log("rerendering cookbook");
    let cookbook;

    // choose which cookbook to use
    if (this.state.searchbarValue === ''){
        cookbook = this.state.cookbook;
    } else {
        cookbook = this.state.filteredCookbook;
    }

    return (
        <div className="App">
            <Header />
            <div id="dialogWindow">
                {this.state.showAddChapter && <AddChapterDialog showAddChapterDialog={this.displayAddChapterWindow} rerenderCookbook={this.rerenderCookbook}/>}
                {this.state.showAddRecipe && <AddRecipeDialog showAddRecipeDialog={this.displayAddRecipeWindow} rerenderCookbook={this.rerenderCookbook}/>}
            
            </div>
            <div id="customContextWindow">
                {this.state.showContextMenu && <CustomContextMenu showContextMenu={this.displayContextMenu} renameItem={(bool) => {console.log(bool); this.displayRenameDialog(bool)}} deleteItem={this.displayDeleteDialog}/>}
            </div>
            <div id="smallDialogWindow">
                {this.state.showRename && <RenameChapterRecipeDialog showRenameChapterRecipeDialog={this.displayRenameDialog} itemTypeToModify={this.state.itemTypeToModify} textToModify={this.state.textToModify} recipeChapter={this.state.recipeChapter} rerenderCookbook={this.rerenderCookbook} />}
                {this.state.showDelete && <DeleteChapterRecipeDialog showDeleteChapterRecipeDialog={this.displayDeleteDialog} itemTypeToDelete={this.state.itemTypeToModify} textToDelete={this.state.textToModify} recipeChapter={this.state.recipeChapter} rerenderCookbook={this.rerenderCookbook} />}
            </div>
            <input type="text" id="search-bar" placeholder="Search recipes" value={this.state.searchbarValue} onChange={this.handleSearchBarChange}></input>
            <div id="cookbook">
                <DragDropContext onDragEnd={this.handleOnDragEnd}>
                { cookbook.length > 0 &&
                   <ul>
                            { cookbook.map((chapter, index) => 
                                <Chapter name={chapter.chapterName} recipes={chapter.recipes} rightClick={ (event)=>{this.showMenu(event);} } index={index}/>
                            )} 
                    
                    </ul>
                }    
                { (cookbook.length === 0 && this.state.searchbarValue !== '') &&
                   <div id="empty-search-results">No recipes found</div>
                }         
                 </DragDropContext>  

            </div>
            {!this.state.cookiesAccepted && <CookiePopupWarning accepted={this.state.cookiesAccepted} showCookiePopupWarning={(bool) => {this.showCookiePopupWarning(bool)}}/>}
            <div className="add-bar flex-container">
                <div id="add-chapter" className="add-btn" onClick={() => this.displayAddChapterWindow(true)}><div className="add-sign">+</div>Add chapter</div><div id="add-recipe" className="add-btn" onClick={()=>{ this.displayAddRecipeWindow(true) }}><div className="add-sign">+</div>Add recipe</div>
            </div>
        </div>
    );
}

Chapter.js
...

render(){
    let chapterExpanded;
    if (this.props.recipes.length === 0){  // if no recipes, don't show toggle 
        chapterExpanded="none";
    } else {  // otherwise expand chapter
        chapterExpanded="true";
    }

    return (
        <Droppable droppableId={this.props.name}>
            {(provided) => (
        <div {...provided.droppableProps} ref={provided.innerRef} className="droppable-div" >
            <li itemType="chapter" ref={this.chapterRef} chapterExpanded={chapterExpanded} onClick={()=>{this.toggleChapter();}}  onContextMenu={(event)=>{this.props.rightClick(event); event.preventDefault();}} >{this.props.name}</li>
            <ul ref={this.recipesRef} chapterOpen="true">
                {this.props.recipes.map((recipe, index) => 
                    <Recipe content={recipe} key={recipe._id} chapter={this.props.name} index={`${index}`} sendRightClick={(event)=>{this.props.rightClick(event); event.preventDefault();}}/>
                )}
            {provided.placeholder}
            </ul>
        </div>
        )}
        </Droppable>
    );
}

食谱.js
...

render(){

    let chapter = this.props.chapter;
    let recipeId = this.props.content.nameId;

    return (
        <Draggable key={recipeId} draggableId={recipeId} index={this.props.index}>
            {(provided)=>(
                <div className='recipe' ref={provided.innerRef} {...provided.draggableProps} {...provided.dragHandleProps}>
                    <div>
                        <li recipeType={this.props.content.method} chapterName={chapter} link={this.recipe.recipeLink} itemType="recipe" onClick={()=>{this.displayRecipe()}} onContextMenu={(event)=>{this.props.sendRightClick(event)}}>{this.recipe.name}</li>
                        <img className="recipe-icon" src={notesImg} onClick={()=>{this.showNotes()}}/>
                    </div>
                    <textarea className="cookbook-notes" notesOpen={this.state.notesOpen} disabled={this.state.notesDisabled} value={this.state.notes} onChange={(event)=>{this.accessNotes.updateNotes(event, chapter, recipeId); this.setState({notes: event.target.value});}}></textarea>
                </div>
            )}
        </Draggable>
    );
}

Answer 1

唉，我是个白痴，将索引错误地传递给了 Recipe 组件。它应该是 index = { index } 而不是 index = { ${index} }