如何使用laravel collection helper方法？

Question

I'm trying to build a small application on laravel-5.4 where I'm having a relational query something like this:

$companies = Company::where('is_client', '=', 1)
    // load count on distant model
    ->with(['interactionSummaries.interaction' => function ($q) {
        $q->withCount(['contactsAssociation' => function ($q) {
            $q->whereHas('company', function ($q) {
                $q->where('type', 'like', 'Investor');
            });
        }]);
    }])
    ->get();

Now I want to collect all the contact_association_counts generated from the query and add it to individual company collection For this I'm using pluck, collapse and sum method, but I don't know it is not calculating as desired. Following is the screenshots:

I get list of collection as following:

Now I get the attributes:

Now relational data:

Now interaction data, where the count belongs:

So for this I tried:

$companies = Company::where('is_client', '=', 1)
    // load count on distant model
    ->with(['interactionSummaries.interaction' => function ($q) {
        $q->withCount(['contactsAssociation' => function ($q) {
            $q->whereHas('company', function ($q) {
                $q->where('type', 'like', 'Investor');
            });
        }]);
    }])
    ->get()
    ->transform(function ($company) {
        $company->contacts_association_count = $company->interactionSummaries
            ->pluck('interaction.contacts_association_count')
            ->collapse()
            ->sum();
        return $company;
    });

But this is not calculating the counts, all the counts are coming to 0

Help me out in this. Thanks

Answer 1

I believe that your problem is the ->collapse() seeing your example after the ->pluck('interaction.contacts_association_count') you should have a flat array as [1,2,3,4,5] if you apply collapse() to a flat array it returns a void array [] and the sum of a void array is 0

$companies = Company::where('is_client', '=', 1)
    // load count on distant model
    ->with(['interactionSummaries.interaction' => function ($q) {
        $q->withCount(['contactsAssociation' => function ($q) {
            $q->whereHas('company', function ($q) {
                $q->where('type', 'like', 'Investor');
            });
        }]);
    }])
    ->get()
    ->transform(function ($company) {
        $company->contacts_association_count = $company->interactionSummaries
            ->pluck('interaction.contacts_association_count')
            //->collapse()
            ->sum();
        return $company;
    });

I hope it works... good luck!