How to use 'Where Not In' in Laravel 5.4? - sql

Question

I'm trying to create a query where I get data from a table and I use INNER JOIN and Where Not In, I was able to adapt the INNER JOIN part, but in 'WHERE NOT IN' I tried using 'WhereNotIn' from Laravel 5.4. But it returns the error: Invalid argument supplied for foreach()
SELECT
em.erp_mlbid AS category_id
FROM
erp_product AS ep
INNER JOIN
erp_product_category AS epc ON epc.erp_productid = ep.erp_productid
INNER JOIN
erp_mlbcategory_erpcategory AS emc ON emc.erp_categoryid = epc.erp_categoryid
INNER JOIN
erp_mlb_category AS em ON em.erp_mcid = emc.erp_mlbcategoryid
WHERE
ep.erp_productid NOT IN (
SELECT
epm.erp_productid
FROM
erp_product_to_mlb AS epm
)
AND ep.erp_quantity > 0
AND ep.erp_status > 0
LIMIT
10,10
So I created this in my application:
$categoria = DB::table('erp_product')
->join('erp_product_category','erp_product_category.erp_productid', '=', 'erp_product.erp_productid')
->join('erp_mlbcategory_erpcategory', 'erp_mlbcategory_erpcategory.erp_categoryid', '=','erp_product_category.erp_categoryid')
->join('erp_mlb_category', 'erp_mlb_category.erp_mcid', '=', 'erp_mlbcategory_erpcategory.erp_mlbcategoryid')
->select('erp_mlb_category.erp_mlbid')
->whereNotIn('erp_product.erp_productid', function($query){
$query->select('erp_productid')
->from('erp_product')
->where('erp_productid', '=', 'erp_product_category.erp_productid');
})
->get();
Any suggestion?

Answer 1

This lines of code is wrong:
->whereNotIn('erp_product.erp_productid', function($query){
$query->select('erp_productid')
->from('erp_product')
->where('erp_productid', '=', 'erp_product_category.erp_productid');
})
remove this line ->where('erp_productid', '=', 'erp_product_category.erp_productid') cause there is not join here.
you can't say ->whereNotIn('erp_product.erp_productid' and $query->select('erp_productid')->from('erp_product') in the same order whereNotIn to check the value in the first_column not exists in the second_column not in same first_column.
So, clear this line ->where('erp_productid', '=', 'erp_product_category.erp_productid') and check the right name to put in $query->select('right_column_name')->from('right_table_name').

Answer 2

$ids= DB::table('erp_product')->pluck('erp_productid')
$categoria = DB::table('erp_product')
->join('erp_product_category','erp_product_category.erp_productid', '=', 'erp_product.erp_productid')
->join('erp_mlbcategory_erpcategory', 'erp_mlbcategory_erpcategory.erp_categoryid', '=','erp_product_category.erp_categoryid')
->join('erp_mlb_category', 'erp_mlb_category.erp_mcid', '=', 'erp_mlbcategory_erpcategory.erp_mlbcategoryid')
->select('erp_mlb_category.erp_mlbid')
->whereNotIn('erp_product.erp_productid',$ids)
->get();