How can I chain having() clause on my eloquent request - eloquent

Question

I have to make a request to filter some datas on my laravel app (v8).
I'm using livewire to filtering datas on a table.
The full request :
$datas = Client::withSum(
[ 'statistics_products as statistics_products_sum_'.$this->n_1 => fn ($query) => $query->where('yr', $this->n_1)],
'total_ht')
->withSum(
[ 'statistics_products as statistics_products_sum_'.$this->n_2 => fn ($query) => $query->where('yr', $this->n_2)],
'total_ht')
->withSum(
[ 'statistics_products as statistics_products_sum_'.$this->n => fn ($query) => $query->where('yr', $this->n)],
'total_ht')
// For is_deleted selection
->when($this->deleted, function ($query, $deleted) {
if($deleted == 'oui') {
$query->where('is_delete', 1);
} elseif($deleted === 'non') {
$query->where('is_delete', 0);
}
})
// For dpt selection
->when($this->dpt, function ($query, $dpt) {
$query->where('postal_code', 'LIKE', $this->dpt. '%');
})
// For referent selection
->when($this->referent, function ($query, $referent) {
if($referent === 'oui') {
$query->whereColumn('client_num', 'sign_num');
} elseif($referent === 'non') {
$query->whereColumn('client_num', '!=', 'sign_num');
}
})
->when($this->ca, function ($query, $ca) {
if($this->year != null) {
if($ca === 'A') {
$query->having('statistics_products_sum_'.$this->year, '<', 20000)->orHaving('statistics_products_sum_'.$this->year, '=', null);
}elseif($ca === 'B') {
$query->havingBetween('statistics_products_sum_'.$this->year, [20001, 40000]);
}elseif($ca === 'C') {
$query->havingBetween('statistics_products_sum_'.$this->year, [40001, 60000]);
}elseif($ca === 'D') {
$query->havingBetween('statistics_products_sum_'.$this->year, [60001, 100000]);
}elseif($ca === 'E') {
$query->havingBetween('statistics_products_sum_'.$this->year, [100001, 500000]);
}elseif($ca === 'F') {
$query->having('statistics_products_sum_'.$this->year, '>', 500000);
}
}
})
// For search
->when($this->search, function ($query, $search) {
$query->searchIn3Columns('society_name', 'city','postal_code', $search);
})
->paginate($this->pagination_number);
But this part doesn't work properly :
if($ca === 'A') {
$query->having('statistics_products_sum_'.$this->year, '<', 20000)
->orHaving('statistics_products_sum_'.$this->year, '=', null);
}
Here I only get results for 'statistics_products_sum_'.$this->year, '<', 20000
I don't get the result where it's null...
Do you know how can I chain two having clause?

Answer 1

This part of the query doesn't seem right:
->orHaving('statistics_products_sum_'.$this->year, '=', null); // = null ???
Maybe try with:
if ($ca === 'A') {
$query->having('statistics_products_sum_' . $this->year, '<', 20000)
->orWhereNull('statistics_products_sum_' . $this->year);
}