将原始 SQL 转换为 Laravel 查询生成器

Question

I'm having difficulty converting this SQL query to Laravel Query Builder.I tried for hours but couldn't get my head around this.I tried online tools for converting SQL to Query builder but didn't work.

Here is my code:

SELECT 
   technologies.name_en,
   Count(cig_members.id) AS CigTotal,
   Count(CASE
           WHEN cig_members.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS CigTotalEthnic,
   Count(CASE
           WHEN cig_members.gender = 'female' THEN 1
           ELSE NULL
         END) AS CigTotalFemale,
   Count(CASE
           WHEN cig_members.gender = 'female'
                AND cig_members.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS CigTotalEthnicFemale,
   Count(farmers.id) AS NonCigTotal,
   Count(CASE
           WHEN farmers.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS NonCigtoTalEthnic,
   Count(CASE
           WHEN farmers.gender = 'female' THEN 1
           ELSE NULL
         END) AS NonCigTotalFemale,
   Count(CASE
           WHEN farmers.gender = 'female'
                AND farmers.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS NonCigtTotalEthnicFemale
   FROM   adopting_technologies
   JOIN adopting_farmers
          ON adopting_farmers.id = adopting_technologies.adopting_farmer_id
   LEFT JOIN cig_members
          ON cig_members.id = adopting_farmers.cig_member_id
   LEFT JOIN farmers
          ON farmers.id = adopting_farmers.farmer_id
   LEFT JOIN financial_years
          ON financial_years.id = adopting_farmers.financial_year_id
   LEFT JOIN technologies
          ON technologies.id = adopting_technologies.technology_id
   GROUP  BY adopting_technologies.technology_id

How can I convert this?

Answer 1

It should look roughly like this:

$result = AdoptingTechnology::selectRaw("
        technologies.name_en,
   Count(cig_members.id) AS CigTotal,
   Count(CASE
           WHEN cig_members.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS CigTotalEthnic,
   Count(CASE
           WHEN cig_members.gender = 'female' THEN 1
           ELSE NULL
         END) AS CigTotalFemale,
   Count(CASE
           WHEN cig_members.gender = 'female'
                AND cig_members.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS CigTotalEthnicFemale,
   Count(farmers.id) AS NonCigTotal,
   Count(CASE
           WHEN farmers.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS NonCigtoTalEthnic,
   Count(CASE
           WHEN farmers.gender = 'female' THEN 1
           ELSE NULL
         END) AS NonCigTotalFemale,
   Count(CASE
           WHEN farmers.gender = 'female'
                AND farmers.is_ethnic = 1 THEN 1
           ELSE NULL
         END) AS NonCigtTotalEthnicFemale
         ")
            ->join('adopting_farmers', 'adopting_farmers.id','adopting_technologies.adopting_farmer_id')
            ->leftJoin('cig_members','cig_members.id','adopting_farmers.cig_member_id')
            ->leftJoin('farmers','farmers.id','adopting_farmers.farmer_id')
            ->leftJoin('financial_years','financial_years.id','adopting_farmers.financial_year_id')
            ->leftJoin('technologies','technologies.id','adopting_technologies.technology_id')
            ->groupBy('adopting_technologies.technology_id')
            ->get();

If you have any issues let me know:) ofc cannot test it locally

Answer 2

DB::table('adopting_technologies')
            ->select('adopting_technologies.technology_id', 'technologies.name_en')
            ->selectRaw("
                COUNT(cig_members.id) AS CigTotal,
                COUNT(CASE WHEN cig_members.is_ethnic = 1 THEN 1 ELSE NULL END) AS CigTotalEthnic,
                COUNT(CASE WHEN cig_members.gender = 'female' THEN 1 ELSE NULL END) AS CigTotalFemale,
                COUNT(CASE WHEN cig_members.gender = 'female' AND cig_members.is_ethnic = 1 THEN 1 ELSE NULL END) AS CigTotalEthnicFemale,
                COUNT(farmers.id) AS NonCigTotal,
                COUNT(CASE WHEN farmers.is_ethnic = 1 THEN 1 ELSE NULL END) AS NonCigtoTalEthnic,
                COUNT(CASE WHEN farmers.gender = 'female' THEN 1 ELSE NULL END) AS NonCigTotalFemale,
                COUNT(CASE WHEN farmers.gender = 'female' AND farmers.is_ethnic = 1 THEN 1 ELSE NULL END) AS NonCigtTotalEthnicFemale
            ")
            ->join('adopting_farmers', 'adopting_farmers.id', '=', 'adopting_technologies.adopting_farmer_id')
            ->leftJoin('cig_members', 'cig_members.id', '=', 'adopting_farmers.cig_member_id')
            ->leftJoin('farmers', 'farmers.id', '=', 'adopting_farmers.farmer_id')
            ->leftJoin('financial_years', 'financial_years.id', '=', 'adopting_farmers.financial_year_id')
            ->leftJoin('technologies', 'technologies.id', '=', 'adopting_technologies.technology_id')
            ->groupBy('adopting_technologies.technology_id')
            ->get();

Answer 3

class adopting_technologies extends Model
{
    public function newCollection(array $models = [])
    {
        return new FarmerCollection($models);
    }
    public function adopting_farmers()
    {
        return $this->belongsTo(adopting_farmers::class);
    }
    // other relations for 'cig_members', 'farmers', 'financial_years' and 'technologies'
}

namespace App\Collections;

use Illuminate\Database\Eloquent\Collection;
 
class FarmerCollection extends Collection
{

    public function cigTotal()
    {
        return $this->pluck('cig_members')->map(function($items) { return $items->count(); })->sum();
    }
    // other totals for cigTotalEthnic, CigTotalFemale, CigTotalEthnicFemale, NonCigTotal, NonCigtoTalEthnic, NonCigTotalFemale, NonCigtTotalEthnicFemale
}