René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Error even with source code for lecture 78 (previous lecture Nr52 ? ) ","articleBody":"Hello,\r\n\r\nThere seems to be a problem with the 52-end.zip source code package. In lesson 78 I cant get the author name to be dynamic and my app keeps crashing. Link to course: https://www.udemy.com/course/learn-javascript-full-stack-from-scratch/learn/lecture/15187916\r\n\r\nWhen you try to visit a post you do have created like this example.\r\n\r\nhttp://localhost:3000/post/63737db924dc689ee19085eb\r\nWhen you run it , it throws a error.\r\n\r\nI was comparing my code with the source code because I thought I made a typo, but this error also shows up when running your source code\r\n\r\n**The error**\r\n\r\n/var/www/html/52/models/Post.js:67\r\n        username: post.author.username,                    [](url)        \r\nTypeError: Cannot read properties of undefined (reading 'username')\r\n    at /var/www/html/52/models/Post.js:67:31\r\n    at Array.map (\u003canonymous\u003e)\r\n    at /var/www/html/52/models/Post.js:65:19\r\n    at processTicksAndRejections (node:internal/process/task_queues:96:5)\r\n\r\n**Enclosure**\r\n[52-end.zip](https://github.com/LearnWebCode/javascript/files/10014353/52-end.zip)\r\n","author":{"url":"https://github.com/TheLaughingThird","@type":"Person","name":"TheLaughingThird"},"datePublished":"2022-11-15T16:18:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/3/javascript/issues/3"}