I got this query written out in Laravel query builder, bu when i run it, it returns this error: Call to a member function join() on float
$avgYield= DairyCropYield::avg('moisture')
->join('dairy_crops','dairy_crops.id','=','dairy_crop_yields.dairy_crop_id')
->join('dairy_crop_varieties','dairy_crops.dairy_crop_variety_id','=','dairy_crop_varieties.id')
->where('dairy_crop_varieties.crop','=',$crop->crop)
->whereYear('harvested_at','=',Carbon::now()->year)
->get();
But when i write the same query in mySql it wroks as exptected:
SELECT AVG(moisture) FROM dairy_crop_yields AS yield JOIN dairy_crops AS crop ON crop.id = yield.dairy_crop_id JOIN dairy_crop_varieties AS variety ON variety.id = crop.dairy_crop_variety_id WHERE variety.crop = 'corn' AND YEAR(harvested_at) = 2015
Any thoughts / suggestions on what I am not doing right in Laravel query builder. I do want to master and stick with Laravel's query builder. Thanks.