I have a user table in laravel app.
I want to find a random user with the lowest number of loan_limit.
Right now I have this.
$random_user = User::inRandomOrder()
->where('loan_limit', '<=', 5)
->first();
But I want to find a random user with the minimum no. Of loan_limit like if a user has a loan_limit of 0, that user will get picked first, and if a user has 1, that user will be selected next, and finally if a user has a limit of 5, then that user will have less probability of getting picked.
you can get all the users with min loan_limit value, then take random one:
$random_user = User::whereRaw('loan_limit= (select min(`loan_limit`) from users)')
->get()->random();
Related
I would like to find out how many Users have Swipes per day without duplicates of user_id within group.
So if a User has swiped multiple times on a day, I want the User only show once per group (per day). I am not really interested in the actual Swipes but rather in the swipe count per day.
I tried:
Swipe::all()->groupBy(function($item){ return $item->created_at->format('d-M-y'); })->unique('user_id')
To remove duplicate data, you can use unique().
I create an example for you.
I have dummy data like
.
So you want the result is data grouped by created_at and on every date return how many users swipe it but without duplicate user?
The code should be like:
$collect = Swipe::all()->groupBy(function($data){
return $item->created_at->format('d-M-y');
})->transform(function($dataGrouped,$date){
return [
$date => $dataGrouped->unique('user_id')
];
});
The result will be like:
In my website I track clicks on a specific link and save the count on database with this function:
public function redirect($url)
{
$data = Class::where('url', $url)->first('clicks');
$cnt = $data->clicks;
$cnt++;
$sql = Class::where('url', $url)->update([
'clicks' => $cnt,
]);
if (!$sql) {
abort(500);
}
return redirect('https://website.com/'.$url);
}
the problem is if someone spam the link , the count goes up. I want stop count if user clicked on link 5mins ago.
he will redirected to the link but count doesn't go up.
I'm new so it's so good if you explain it with details. Thanks
I would create a new table, lets call it link_clicks. You will need 3 columns, one to identify the person, one to get the time and one to identify the link (I dont exactly know how you store the links you want to observe).
So more or less you will have the following table:
link_clicks
user_id
link_id
created_at
If the users are always logged in, I would store the user_id, if they are not logged in, I would store the IP-address. So instead of user_id make a column called ip or ip-address.
Afterwards you can easily get the last click and its time.
--Example
Your new table contains following entry:
user_id = 1, link_id = 1 and created_at = 2021-04-21 19:00:00
Now in your controller you get the current date_time date("Y-m-d H:i:s") and the user id like that: auth()->id(). You can also define your time treshold in minutes e.g max_dif = 5.
Afterwards you can query the table for all clicks for the user. You can either make the time comparision in your where() statement or you can make some comaprison in your php code to check if the time treshhold is reached.
Hello Everyone can you please help me to resolve this
I want to get the user count day-wise, for example, I want to know how many users registers in last week
like date of
22-07-19
user count 20
23-07-19
user count 30
24-07-19
user count 10
25-07-19
user count 15
I want this result for last 7 day from today
basically, I want to show this in my chart please check the image here
By selecting DATE(created_at) and grouping by that, we can get the count of users that have registered each day. We can then add a simple where clause, using Carbon to help us get the lower bounds.
Example (where x = date and y = count):
User::selectRaw('DATE(created_at) as x, COUNT(*) as y')
->groupBy('x')
->where('created_at', '>', Carbon::now()->subWeek())
->get();
I have the following models: User, Order, OrderPayment
whereby each user has many orders, and each order has many order payments.
The orderPayment model has the attribute "total_paid"
I would like to get the sum of the user's total paid for all his orders.
eg:
user has 3 orders.
the first order has the two following payment records: 5$ and 4$.
the second order has one payment of 10$
the third order has two payment records of 1$ and 4$
the total sum i want is 5 + 4+ 10+ 1+ 4 = 24$.
I have tried the following but it's not working at all :
$user->orders->orderpayment->sum('total_paid');
but i get this error
Property [orderPayment] does not exist on this collection instance
Since you want to sum values from the OrderPayment model, it is easier to start there. Try to write it like this:
OrderPayment::whereHas('order.user', function($query) use ($userId) {
$query->whereId($userId);
})->sum('total_paid');
Make sure all the relations are defined well.
Try:
$user->orders->orderpayment()->sum('total_paid');
The title is very wordy. So I'll explain with an example.
We have a database of 10,000 twitter users with each following up to 2000 users. The algorithm takes as input one random never before seen user (including the people that follow him), and returns the twitter users from the database by order of how many of his followers they follow.
i.e.
We have:
User A follows 1,2,3,4
User B follows 3,4,5,6
User C follows 4,8,9
We enter user X who has users 3,4,5 following him.
The algorithm should return:
B: 3 matches (3,4,5)
A: 2 matches (3,4)
C: 1 match (4)
Store the data as a sparse integer matrix A of size 10^5x10^5 with ones at the appropriate places. Then, given a user i, compute A[i,] * A (matrix multiplication). Then sort.
Assuming you have a table structure similar to this:
Table Users
Id (PK, uniqueidentifier, not null)
Username (nvarchar(50), not null)
Table UserFollowers
UserId (FK, uniqueidentifier, not null)
FollowerId (uniqueidentifier, not null)
You can use the following query to get the common parents of followers of the followers of the user in query
SELECT Users_Inner.Username, COUNT(Users_Inner.Id) AS [Total Common Parents]
FROM Users INNER JOIN
UserFollowers ON Users.Id = UserFollowers.FollowerId INNER JOIN
UserFollowers AS UserFollowers_Inner ON UserFollowers.FollowerId = UserFollowers_Inner.UserId INNER JOIN
Users AS Users_Inner ON UserFollowers_Inner.FollowerId = Users_Computed.Id
WHERE (UserFollowers.UserId = 'BD34A1FF-FCF5-4D35-B8A3-EFFB1587A874')
GROUP BY Users_Inner.Username
ORDER BY COUNT(Users_Inner.Id) DESC
would something like this work?
for f in followers(x)
for ff in followers(f)
count[ff]++ // assume it is initially 0
sort the ff-s by their counts
Unlike the matrix solution, the complexity of this is proportional to the number of people involved rather than the number of users on twitter.