laravel 8 API : how pass username with Auth as user_id value for store post

Question

I'm building an API with Laravel 8.

I have a posts table with these columns:

id
category_id
user_id
title
body
picture
study_time
likes
tags

When a user is logged in as an author or admin, they can add a new post.

and for user_id field, I want to make that field guarded, I want to show username with JWTAuth::user()->username and register it for user_id column.. so no one can enter any value for it

edit: when i send request it gives me this error: SQLSTATE[HY000]: General error: 1364 Field 'user_id' doesn't have a default value (SQL: insert into posts

this is my store method in PostController:

$data = $request->all();
$validator = Validator::make($data, [
    'category_id' => 'required',
    'title' => 'required|max:100|unique:categories',
    'body' => 'required',
    'picture' => 'required',
    'study_time' => 'required',
    'tags' => 'null|string',
]);

if ($validator->fails()) {
    return response(['error' => $validator->errors(), 'Validation Error']);
}

$tags = explode(",", $request->tags);

$post = Post::create($data);
$post->tag($tags);

return response()->json([
 'username' => JWTAuth::user()->username,
 'post' => $post
], 201);

Answer 1

add this after $data=$request->all():

$data['user_id'] = JWTAuth::user()->id;

or you can use this instead (if you define posts in user model):

JWTAuth::user()->posts()->create($data);

Answer 2

You can use $request->user() to get the current user.

Answer 3

$post = Post::create($data);
$post->tag($tags);
$post->username => JWTAuth::user()->username

return response()->json([
    'post' => $post
], 201);