QueryException in laravel 5.6 - php

Question

I have converted an sql into laravel query so I came with this below.
DB::table('posts')
->select('posts.*', DB::raw('GROUP_CONCAT(l.name ORDER BY l.id) as location_name'))
->join('locations as l', "posts.location_ids", "=", "l.id")
->whereRaw('FIND_IN_SET(l.id, posts.location_ids) > 0')
->where("posts.status", 'active')
->groupBy('posts.id')
->get();
But it gives me an error.
SQLSTATE[42000]: Syntax error or access violation: 1055 'laraveltest.posts.title' isn't in GROUP BY (SQL: select `posts`.*, GROUP_CONCAT(l.name ORDER BY l.id) as location_name from `posts` inner join `locations` as `l` on `posts`.`location_ids` = `l`.`id` where FIND_IN_SET(l.id, posts.location_ids) > 0 and `posts`.`status` = active group by `posts`.`id`)
When I run this query into any mysql tool, it returns row without any fail. why laravel giving me errors?

Answer 1

This is a setting in laravel/mysql for laravel look in config/database.php.
Set strict mode to false
'connections' => [
'mysql' => [
'strict' => false,
]
Laravel is not giving you the error it's just actually enforcing MYSQL rules. PHPMYADMIN and other tools don't force it so that's why you don't get the error.

Answer 2

The reason laravel is so good, is because you can get rid of writing huge database queries like this.
You should take some time out to really site down and read the documentation for laravel and how eloquent works. You will be surprised how quickly you pick it up, i promise.
Now for a situation such as your self, you have two models.
Post Model
Location Model
In your Posts model you would create a relationship like so
public function location()
{
return $this->belongsTo(Location::class);
}
and in your Location model you would now define a relationship like so
public function post()
{
return $this->hasMany(Post::class);
}
Now in your posts_table you need to ensure you have a location_id integer column.
Now what you can do is get the Location instance you want for example:
//This will give you the row where id = 1
$location = Location::find(1);
Now you can easily do this to access all the posts with that location:
foreach($location->posts as $post){
//Do whatever you want here $post is the object
echo $post->title
}
And the relationship works on the inverse, example:
$post = Post::find(1);
Now because this post belongs to only 1 location you can call it like so
echo $post->location->column_name_in_location_table
Hope this helps kick start your journey to learning laravel!