Restore customers from backup in Magento

I recently had two different clients who deleted customers from their instance of Magento1 and Magento2. Although it says:

Once Is Chance, Twice is Coincidence, Third Time Is A Pattern

unknown

i think this is a pattern which needs to be fixed in UI.

But first we have to recover the missing customers. Hopefully you have a sql dump of the shops’s database!

# restore backup into database mage_restore
> gunzip -c magento.sql.gz|mysql mage_restore
# extract customer from this database
> mysqldump -t --skip-extended-insert mage_restore customer_address_entity customer_address_entity_datetime customer_address_entity_decimal customer_address_entity_int customer_address_entity_text customer_address_entity_varchar customer_entity customer_entity_datetime customer_entity_decimal customer_entity_int customer_entity_text customer_entity_varchar wishlist wishlist_item > customers_restore.sql
# import in shop database
> mysql magento < customers_restore.sql

Add

--insert-ignore

if partial data exists in tables (that is: not alle customers were deleted or customers created accounts in the shop after the delete event).

Match orders in Magento 1

After importing the customers we have to link their orders back to their accounts as the reference in an order is set to NULL when the customer is deleted.

-- link orders
UPDATE magento.sales_flat_order as orig inner join mage_restore.sales_flat_order as res on orig.entity_id=res.entity_id set orig.customer_id=res.customer_id;
UPDATE sales_flat_order_grid INNER JOIN sales_flat_order ON sales_flat_order_grid.entity_id = sales_flat_order.entity_id SET sales_flat_order_grid.customer_id = sales_flat_order.customer_id; 
-- check
SELECT orig.entity_id, res.entity_id, orig.customer_id, res.customer_id from magento.sales_flat_order as orig inner join mage_restore.sales_flat_order as res on orig.entity_id=res.entity_id; 

Match orders in Magento 2

-- link orders
UPDATE magento2.sales_order as orig inner join mage_restore.sales_order as res on orig.entity_id=res.entity_id set orig.customer_id=res.customer_id;
-- if you get warnings due to missing keys see below to fix!
UPDATE sales_order_grid INNER JOIN sales_order ON sales_order_grid.entity_id = sales_order.entity_id SET sales_order_grid.customer_id = sales_order.customer_id;
-- check
SELECT orig.entity_id, res.entity_id, orig.customer_id, res.customer_id from magento2.sales_order as orig inner join mage_restore.sales_order as res on orig.entity_id=res.entity_id; 

Fix missing keys

If partial data exists in tables add keyword

ignore

in first UPDATE.
This situation arises if – after customer deletion – formerly existing customers created new accounts. So the old one can’t be created due to duplicate email addresses.
Check via

select orig.entity_id, res.entity_id, orig.customer_id, res.customer_id, c.email, c2.entity_id from magento2.sales_order as orig inner join mage_restore.sales_order as res on orig.entity_id=res.entity_id inner join mage_restore.customer_entity as c on res.customer_id=c.entity_id inner join magento2.customer_entity as c2 on c.email=c2.email where res.customer_id is not null and orig.customer_id is null;

You can fix those as well by matching the new customer account on the email address:

update magento2.sales_order as orig inner join mage_restore.sales_order as res on orig.entity_id=res.entity_id inner join mage_restore.customer_entity as c on res.customer_id=c.entity_id inner join magento2.customer_entity as c2 on c.email=c2.email set orig.customer_id=c2.entity_id where res.customer_id is not null and orig.customer_id is null;

In Magento2 you have to reindex customer_grid as final step!

Schreib einen Kommentar

Deine E-Mail-Adresse wird nicht veröffentlicht. Erforderliche Felder sind mit * markiert.