Magento ver. 2.2.6 ==> 2.3 ==> magento-coding-standard 1.0.2 required

[fabianus]

Hello all, 

on trying to upgrade from magento 2.2.6 to 2.3 (CE) I get the following error - does anybody know how to get this fixed? Btw - I do not want to develop stuff for my magento application. 

Check Component Dependency

We found conflicting component dependencies. Hide detail

Command "update" failed: Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- magento/magento-coding-standard 1.0.2 requires squizlabs/php_codesniffer ~3.3.0 -> satisfiable by squizlabs/php_codesniffer[3.3.0, 3.3.1, 3.3.2] but these conflict with your requirements or minimum-stability.
- magento/magento-coding-standard 1.0.1 requires squizlabs/php_codesniffer ~3.3.0 -> satisfiable by squizlabs/php_codesniffer[3.3.0, 3.3.1, 3.3.2] but these conflict with your requirements or minimum-stability.
- magento/magento-coding-standard 1.0.0 requires squizlabs/php_codesniffer ~3.3.0 -> satisfiable by squizlabs/php_codesniffer[3.3.0, 3.3.1, 3.3.2] but these conflict with your requirements or minimum-stability.
- Installation request for magento/magento-coding-standard ~1.0.0 -> satisfiable by magento/magento-coding-standard[1.0.0, 1.0.1, 1.0.2].

[Vimal Kumar]

Hi @fabianus,

Which method you are trying to upgrade?

I will suggest to upgrade using composer.

You can upgrade using following method:

Take a full backup of code and database before upgrade.

Try once the following commands in the sequence,

rm -rf var/cache/* var/page_cache/* var/generation/*
sudo chmod -R 0777 var/ pub/ generated/
php bin/magento deploy:mode:set developer
php bin/magento cache:disable
php bin/magento maintenance:enable
composer require magento/product-community-edition 2.3.2 --no-update
composer update
rm -rf var/cache/* var/page_cache/* var/generation/*
sudo chmod -R 0777 var/ pub/ generated/
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento cache:enable
php bin/magento maintenance:disable
php bin/magento indexer:reindex && php bin/magento cache:clean && php bin/magento cache:flush

I Hope it will help you!

[Sarvagya Pandey · Accepted solution]

Hello @fabianus ,

It seems that the issue is because of squizlabs/php_codesniffer version. You still have older version of squizlabs/php_codesniffer which is not supported by magento/magento-coding-standard 1.0.2

In your magento root's directory, please take the backup of old composer.json and in new composer.json just edit the version of squizlabs/php_codesniffer like

"squizlabs/php_codesniffer": "3.3.1"

Save the composer.json and execute the update command again. Hope this will solves your issue.

If it helps you, please give us kudos and accept it as solution.

Thank you

[Sarvagya Pandey]

If you want to upgrade it again by following all the steps (I think you have already followed them) you can use the link https://community.magento.com/t5/Installing-Magento-2-x/Upgrade-from-2-1-7-to-2-3-2/m-p/139371/highl...

In the above link (Step 5), it has already used the 3.3.1 versionsquizlabs/php_codesniffer version.

Hope it will help you.

[fabianus]

thanks sarvagya - that's how I proceeded !

[Sarvagya Pandey]

You are welcome @fabianus .

If you like my answer please give kudos to the solution.

Thank you 

[fabianus]

Hi Sarvagya, my post wasn't clear: I wanted to say that this is the way I proceeded, but yet I have the stated error message ...