I am trying to get the news of a writer according to date passed. I have written function so far:
public static function getNewsByAuthorByDate($id, $year, $limit = 1){
return User::where('id', $id)->has('news')
->with(['news' => function($q) use(&$limit, &$year) {
$q->where('created_at', 'like', '%' . $year . '%')->latest()->limit($limit);
}])
->first();
}
But the news[] is null. Is it possible to get writer news according to date or do I have to try another way?
you can use whereYear
public static function getNewsByAuthorByDate($id, $year, $limit = 1){
return User::where('id', $id)->has('news')
->with(['news' => function($q) use(&$limit, &$year) {
$q->whereYear('created_at',$year)->latest()->limit($limit);
}])
->first();
}
and to use limit with eager loading you should use the package eloquent-eager-limit
According to the documentation:
The limit and take query builder methods may not be used when constraining eager loads.
Also, You don't need to use has method, the news would be empty if the user has no news:
return User::with(['news' => function($q) use($year) {
$q->whereYear('created_at', $year)->latest();
}])
->find($id);
Related
My Model has the following one-to-many relationship
class Comment extends Model
{
public function likes(): HasMany
{
return $this->hasMany(CommentLike::class);
}
}
In my Controller I want to get all Comments alongside with a boolean value which indicates if the current user exists in the likes table
$result = Comment::with(['user', 'likes' => function($q) use($user){
$q->where('user_id', $user->id);
}])
->withCount('likes')
->where('post_id', $postId)
->get();
Currently the above query will return the correct result alongside with a row from the likes table if the user is found.
I'm looking for a proper way to return a boolean value to indicate if the user has liked the comment instead.
First, you can find how many likes does user make to the comment, in this way.
$likes = Comment::whereHas(['likes' => function($q) use ($user){
$q->where('user_id', $user->id);
})->where('post_id', $postId)->count();
Then using $likes variable value, you can conditionally create a boolean value and assign to new variable or same $likes variable.
$hasLike = $likes ? true : false;
You can make use of withExists() method. It's not one of the best documented ones, but I think it's quite simple.
In your example:
$result = Comment::with(['user', 'likes' => function($q) use($user){
$q->where('user_id', $user->id);
}])
->withCount('likes')
->where('post_id', $postId)
->get();
Consider changing it to:
$result = Comment::with(['user', 'likes'])
->withCount('likes')
->withExists(['likes' => function ($query) use ($user) {
$query->where('user_id', $user->id);
}])
->where('post_id', $postId)
->get();
Result model will contain additional bool property likes_exists where true means that $user liked the comment and false means that they didn't do it.
Here is how I achieved this
in my model.php file
public function likedByCurrentUser(){
return $this->hasOne(Like::class, "tweet_id", "id")
->where("user_id", auth()->user()->id);
}
likedByCurrentUser method will either return null if no rows match else it will return an eloquent object. So in the controller method we can do something like below to get a boolean.
In the controller method by using withExists
$tweets = TweetModel::with(["user", "likes", "comments.user"])
->withExists([
"likedByCurrentUser as liked_by_current_user" => function($result){
return $result === null;
}
])
->orderBy("updated_at", "desc")
->get();
return response()->json([
"tweets" => $tweets
]);
Wondering if there is a way to use closure on a relationship in order to filter the whole line if there isn't a value which corresponds?
Example code:
foreach ($paiementMethods as $value) {
$giftCards = GiftCard::with(['userEntered', 'userEmployee', 'client', 'payement', 'payement.payementMethods' => function($query) use ($value)
{
$query->where('id', $value);
}])
->where('date','>=', $dateStart)
->where('date','<=', $dateEnd)
->orderBy('updated_at', 'desc')->get();
$giftCardsCollection = $giftCardsCollection->merge($giftCards);
}
}
In this example, if $query->where doesn't find a row for the payement.payementMethods which matches the $value, I want the giftCard to return null. The result I get is the giftCard with only the relation on payement.payementMethods being empty.
My other solution would be to query the giftCard and after that checking the $value to see if I have to include the giftCard in the collection or not.
Best regards
I think using whereHas, it can be solved
$giftCards = GiftCard::with(['userEntered', 'userEmployee', 'client', 'payement', 'payement.payementMethods'])
->whereHas( 'payement.payementMethods', function($query) use ($paiementMethods) {
$query->whereIn('id', $paiementMethods);
})
->where('date','>=', $dateStart)
->where('date','<=', $dateEnd)
->orderBy('updated_at', 'desc')
->get();
I have a simple structure where a post has many votes. A vote has an "value" property which is either 1 or -1
When reading all posts I'd love to select this sum for each post into a custom property on post level. Currently i do this
$posts = Post::where('published_at', '<=', $date)
->orderBy('published_at', 'desc')
->simplePaginate(20);
$posts->each(function($post) {
$post->overallRating = $post->getRating();
});
This is fully working, however I think it's not that good to make like 20 queries to the database to read the ratings. Is there a way to simplify this in the actual fetch of the posts?
public function getRating()
{
return $this->votes->sum('value');
}
If you want to keep the votes included in the in the pagination results then I would suggest adding with('votes') so they're at least eager loaded i.e.
$posts = Post::with('votes')
->where('published_at', '<=', $date)
->orderBy('published_at', 'desc')
->simplePaginate(20);
However, if you don't want/aren't bothered about having the votes and you just want the ratings for each post you could add the following scope to your Post model:
public function scopeWithRating(Builder $query)
{
if (is_null($query->getQuery()->columns)) {
$query->select([$query->getQuery()->from . '.*']);
}
$query->selectSub(
$this->votes()->getRelationExistenceQuery(
$this->votes()->getRelated()->newQuery(), $query, new Expression('sum(value)')
)->toBase(),
'rating'
);
}
Then:
$posts = Post::withRating()
->where('published_at', '<=', $date)
->orderBy('published_at', 'desc')
->simplePaginate(20);
Hope this helps!
Try this:
$posts = Post::where('published_at', '<=', $date)
->orderBy('published_at', 'desc')
->with(['votes' => function($query) {
$query->sum('value');
}])->simplePaginate(20);
(laravel 4.2)
There are four tables involved; users, posts, flags, and post_flags.
I want to retrieve every post a certain user has, and retrieve the flags set for the post, but only the flags that are set by the user in question.
For example: A post can have flags: 1,2,2,3 where flag 2 is set twice. Once by User A, once by User B. I don't want to see the flags that User B has set.
The Eloquent query in my controller:
$posts = Post::whereHas('companies', function($q) use($company_id) {
$q->where('id', '=', $company_id);
})->with('flags')->get();
The Relation in my Post model:
public function flags() {
return $this->belongsToMany('PostFlag', 'post_postflags', 'post_id', 'flag_id')
->withTimestamps()->withPivot('owner');
}
How would I achieve this using Eloquent ORM?
UPDATE
My final query, thanks to andrewtweber:
Final query
$posts = Post::whereHas('users', function($q) use($id) {
$q->where('id', '=', $id);
})->get()->load([
'flags' => function($query) use($id) {
$query->where('owner', '=', $id)->orWhere('owner', '=', 'SYSTEM');
}
]);
Use wherePivot
http://laravel.com/api/4.2/Illuminate/Database/Eloquent/Relations/MorphToMany.html
$flags = $post->flags()
->wherePivot('user_id', '=', $user_id)
->get();
Or with eager loading
$posts->load([
'flags' => function ($query) use($user_id) {
$query->wherePivot('user_id', '=', $user_id);
}
]);
I want to get all Items (topics) WITH their comments, if comments user_id = $id. I try something like this, but it isn't working. So if Item hasn't got any comment with user_id = $id, then I don't need this Item.
In DiscussionsItem model I have methode:
public function discussionsComments() {
return $this->hasMany('DiscussionsComment', 'discussionsitem_id');
}
My query in controller is like this:
$items = DiscussionsItem::whereBrandId($brand_id)
->whereBrandCountryId($country_id)
->with(['discussionsComments' => function($query) use ($id) {
$query->where('user_id', '=', $id);
}])
->whereHas('discussionsComments', function($query) use ($id) {
$query->where('user_id', '=', $id);
})
->with(['views' => function($query) use ($id) {
$query->where('user_id', $id)->count();
}])
->orderBy('created_at', 'DESC')->get();
My problem is that I get items with comments, where comments user_id != $id.
P.S. I need to take 5 comments, but I cant imagine how to do that, because ->take(5) in my eager load is not working.
You can do a custom scope, or just limit the amount returned by your relation:
public function discussionsComments() {
return $this->hasMany('DiscussionsComment', 'discussionsitem_id')
->latest()
->take(5);
}