Laravel Eloquent: Count Rows and group them by the day - laravel

Question

I have a Model called "AdInteraction", these interactions can either be a click or a view (They either have boolean clicked or boolean viewed set to true).
Along every Interaction I save the created_at date.
Now this is what I want to end up with in order to have all the data I need to populate a ChartJS Chart:
[
{
"date": "01-01-2018"
"clicks": 13,
"views": 25
},
{
"date": "02-01-2018"
"clicks": 25,
"views": 74
},
{
"date": "03-01-2018"
"clicks": 0,
"views": 0
},
]
This is a query I already got on my Ad model which is related to AdInteraction:
public function getClicksForLastDays()
{
return $this->clicks()->get()->groupBy(function($date) {
return Carbon::parse($date->created_at)->format('y-m-d');
});
}
However this returns me an array of arrays looking like this:
What would be the correct and most efficient way to fetch the clicks and count them by days?

Answer 1

try this and let me know, I assume your column names are date,clicks,views, if its different then pls let me know, so I will adjust the answer or you can do it your self..
AdInteraction::select([DB::raw('DATE(date)'),DB::raw('count(case when clicks ="true" then 1 end) as "Clicks"'),
DB::raw('count(case when views ="true" then 1 end) as "Views"')])
->groupBy(DB::raw('DATE(date)'))
->get();
or try this
AdInteraction::select([DB::raw('DATE(date)'),DB::raw('count(case when clicks =true then 1 end) as "Clicks"'),
DB::raw('count(case when views =true then 1 end) as "Views"')])
->groupBy(DB::raw('DATE(date)'))
->get();

Answer 2

You should consider abandoning the idea of grouping by date using datetime column since such query will be very inefficient. When you, for example, GROUP BY DATE(created_at) MySQL will be performing this cast function for each row and won't be able to utilize indexes for created_at.
Therefore I recommend you to denormalize your table by introducing separate DATE created_date_at column for created_at value and create an index for it. Then you will be able to efficiently group your stats by this new column value. Just be sure to register the following code for your model:
AdInteraction::creating(function ($adInteraction) {
$adInteraction->created_date_at = $adInteraction->created_at->format('Y-m-d');
});
Or you can consider creating separate int columns for year, month and day. Then you can create a multi-column index and group by these columns. This way you will be able to also easily retrieve stats by days, months and years if needed.