Auto-compact stock entries (closes #1343)

migrations/0143.sql

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+CREATE VIEW stock_splits
+AS
+
+/*
+Helper view which shows splitted stock rows which could be compacted
+*/
+
+SELECT
+	product_id,
+	SUM(amount) AS total_amount,
+	MIN(stock_id) AS stock_id_to_keep,
+	MIN(id) AS id_to_keep,
+	GROUP_CONCAT(id) AS id_group,
+	GROUP_CONCAT(stock_id) AS stock_id_group,
+	id -- Dummy
+FROM stock
+GROUP BY product_id, best_before_date, purchased_date, price, open, opened_date, location_id, shopping_location_id
+HAVING COUNT(*) > 1;

migrations/0144.php

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+<?php
+
+// This is executed inside DatabaseMigrationService class/context
+
+use Grocy\Services\StockService;
+
+$this->getStockService()->CompactStockEntries();