In my application I am currently getting the react warning:
Warning: Each child in a list should have a unique "key" prop.
Check the render method of GetReplies.
This is the GetReplies method:
export function GetReplies(props) {
const Id = props.Id;
const replies = allComments.filter(obj => obj.ParentCommentId === Id).
sort((objA, objB) => new Date(objB.Time) - new Date(objA.Time));
console.log(generateKey(Id));
if (Object.keys(replies).length !== 0) {
return (
<div key = {"replies-container-" + generateKey(Id)} id={"replies-container-" + Id} className="replies-container">
<div key ={"panel-heading replies-title" + generateKey(Id)} className="panel-heading replies-title">
<a key = {"accordion-toggle replies-" + generateKey(Id)} className="accordion-toggle replies-a collapsed" data-parent={"#replies-container-" + Id} data-toggle="collapse" data-target={"#replies-for-" + Id}>Replies</a>
</div>
<div key = {"replies-for-" + Id} id={"replies-for-" + generateKey(Id)} className="replies-list collapse">
{
<React.Fragment>
{ Object.entries(replies).reverse().map(([key, arr]) => {
return (
<GetComments commentsArray = {replies}/>
)
}) }
</React.Fragment>
}
</div>
</div>
);
}
}
and this is the GetComments Method it calls:
export function GetComments({ commentsArray }) {
return (
<React.Fragment>
{commentsArray.map((comment) => {
const localId = comment.LocalId;
const parentCommentId = comment.ParentCommentId;
const parentLocalId = allComments.filter(obj => obj.Id === parentCommentId);
const recipients = comment.Recipients;
let recipientsArray = [];
let recipientsList;
recipients.forEach(function (arrayItem) {
recipientsArray.push(arrayItem.Name);
recipientsList = recipientsArray.join(', ');
});
console.log(generateKey(localId));
const date = new Date(comment.Time);
const formattedDate = date.toLocaleDateString() + " " + ("0" + date.getHours()).slice(-2) + ":" + ("0" + date.getMinutes()).slice(-2);
return (
<div key={generateKey(localId)} className="comment-container">
<div key={generateKey(comment.Commenter.ItemId)} className="commenter">
<span className="id-label">{localId}</span>
{parentCommentId && (
<span className="reply" title={`in reply to ${parentLocalId[0].LocalId}`}>
<a className="reply" href={"#c" + parentLocalId[0].LocalId}>⤵</a> </span>
)}
<span><a id={"c" + localId} name={"c" + localId}>{comment.Commenter.Name}</a></span>
<div key={generateKey(localId) + "-comment-actions-container "} className="comment-actions-container">
<button type="button" className="btn-reply" data-value={comment.Id} title="Reply to comment" data-toggle="modal" data-target="#dlg-new-comment">⥅</button>
</div>
</div>
<div key={generateKey(localId) + "-recipients "} className="recipients">{recipientsList}</div>
<div key={generateKey(localId) + "-comment "} className="comment">{comment.Comment}</div>
<div key={generateKey(localId) + "-comment-footer "} className="comment-footer">{formattedDate}</div>
<GetReplies Id = {comment.Id}/>
</div>
);
})}
</React.Fragment>
);
}
To help make sure each key is unique I made this generate key method:
const generateKey = (pre) => {
return `${ pre }_${ new Date().getTime() }`;
}
However I am still getting that unique key error and I have no idea what it is I could be missing?
I am even tried to expand upon it by doing:
const generateKey = (pre) => {
let index =0;
return `${ pre }_${ new Date().getTime()}_${index++}`;
}
but index would always equal 0? So I'm not sure why that wasn't incrementing either, any advice would be appreciated
