creating mysql query using Yii2 Query Builder, strpos: array given - php

Question

I'm trying to make query builder to output the following MySQL query:
SELECT p1.id, p1.product_id, p1.updated_at
FROM tbl_scrape_data p1
INNER JOIN
(
SELECT max(updated_at) MaxDate, product_id
FROM tbl_scrape_data
WHERE product_id IN (1,2,3)
GROUP BY product_id
) p2
ON p1.product_id = p2.product_id
AND p1.updated_at = p2.MaxDate
WHERE p1.product_id IN (1,2,3)
order by p1.updated_at desc
Here's what I tried:
$scrapeData = (new Query() )
->select(['p1.product_id', 'p1.id', 'p1.updated_at'])
->from('tbl_scrape_data p1')
->innerJoin([
'p2' => (new Query)
->select(['MAX(updated_at) MaxDate', 'product_id' ])
->from('tbl_scrape_data')
->where([ 'product_id' => [1, 2, 3, 15, 4] ])
->groupBy('product_id'),
//->all(),
['p1.product_id' => 'p2.product_id', 'p1.updated_at' => 'p2.MaxDate']
])
->where([ 'p1.product_id' => [1, 2, 3, 15, 4] ])
->orderBy('p1.updated_at DESC')
->all();
Yii2 throws an error trying to perform this query. Can someone tell me if this is a Yii2 bug or if I'm missing something? Or maybe the way I formatted the query builder is wrong?
I'm using Yii 2.0.1 and the error is
strpos() expects parameter 1 to be string, array given
\vendor\yiisoft\yii2\db\QueryBuilder.php at line 715

Answer 1

The reason of the error is in this section of code:
->innerJoin([
'p2' => (new Query)
->select(['MAX(updated_at) MaxDate', 'product_id' ])
->from('tbl_scrape_data')
->where([ 'product_id' => [1, 2, 3, 15, 4] ])
->groupBy('product_id'),
//->all(),
['p1.product_id' => 'p2.product_id', 'p1.updated_at' => 'p2.MaxDate']
])
Instead of passing two parameters - table and on separately you actually passing them in one parameter - array.
Also the first parameter (table) should be array with one element.
In other words, the placement of square brackets is incorrect.
So here is correct code of the INNER JOIN section:
->innerJoin(
['p2' => (new Query)
->select(['MAX(updated_at) MaxDate', 'product_id' ])
->from('tbl_scrape_data')
->where([ 'product_id' => [1, 2, 3, 15, 4] ])
->groupBy('product_id'),
//->all(),
],
['p1.product_id' => 'p2.product_id', 'p1.updated_at' => 'p2.MaxDate']
)
Check the official documentation for innerJoin() method.