Laravel and Eloquent - applying different filters - php

Question

I'm feeling stuck. :(
I want to be able to execute different SQL query, depending on the selected filters in my form:
//My initial query without any filters is this:
$dbQuery="SELECT * FROM \"interactions\" WHERE \"user_id\" = ".Auth::user()->getAttribute('id');
//Then depending on the selected filters the query may be any combination of the following:
if (request('contact_id')) $dbQuery.=" AND \"contact_id\" = ".request('contact_id');
if (request('product_id')) $dbQuery.=" AND \"product_id\" = ".request('product_id');
if (request('type')) $dbQuery.=" AND \"type\" LIKE \"%".request('type')."%\"";
if (request('description')) $dbQuery.=" AND \"description\" LIKE \"%".request('description')."%\"";
if (request('date')) $dbQuery.=" AND \"date\" >= ".request('date');
I have a class called "Interaction" which extends the Eloquent model and I need to be able to execute the above query or represent the same logic through it.
Any ideas on how I can achieve that will be greatly appreciated!
EDIT:
Thanks to Brice (my personal hero today), here is what did the trick for me:
$query = Interaction::where('user_id', Auth::id());
$contact_id = request('contact_id');
$product_id = request('product_id');
$type = request('type');
$description = request('description');
$date = request('date');
if ($contact_id) $query->where('contact_id', $contact_id);
if ($product_id) $query->where('product_id', $product_id);
if ($type) $query->where('type', 'like', "%".$type."%");
if ($description) $query->where('description', 'like', "%".$description."%");
if ($date) $query->where('date', '>=', $date);
$interactions = $query->get();
return view('interactions.index',compact('interactions'));

Answer 1

I'd recommend using the eloquent query builder for this.
For example:
$query = Interaction::where('user_id', Auth::id());
$contact_id = request('contact_id');
$product_id = request('product_id');
$type = request('type');
$description = request('description');
$date = request('date');
if ($contact_id) {
$query->where('contact_id', $contact_id);
}
if ($product_id) {
$query->where('product_id', $product_id);
}
if ($type) {
$query->where('type', 'like', "%$type%");
}
if ($description) {
$query->where('type', 'like', "%$description%");
}
if ($date) {
$query->where('date', '>=', \Carbon\Carbon::parse($date));
}
$results = $query->get();
If you have a lot of results, you may want to use pagination instead of fetching all results at the same time as shown above.

Answer 2

You can use ->when() method docs
$results = Interaction::where('user_id', Auth::id())
->when($contact_id, function ($query) use ($contact_id) {
$query->where('contact_id', $contact_id);
})
->when($product_id, function ($query) use ($product_id) {
$query->where('product_id', $product_id);
})
->when($type, function ($query) use ($type) {
$query->where('type', 'like', "%$type%");
})
->when($description, function ($query) use ($description) {
$query->where('type', 'like', "%$description%");
})
->when($date, function ($query) use ($date) {
$query->where('date', '>=', \Carbon\Carbon::parse($date));
})->get();;