drupal

Started session for anonymous user in mixed mode cause PDOException when user tries to log in. PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'h0c...' for key 'PRIMARY': UPDATE {sessions}

The problem is to add multiple times the same form on the page and process them. You can try to do it, but submitForm will be initiated for all forms, since they have the same id.

This article will provide you the information about running multiple websites with Docker from different docker-compose files, make them working on 80 port with user-friendly urls. Traefik 2 will help with it.

The task was to migrate an old image field to media.

Sometimes there could be an issue with huge DB which was created not with backup_migrate module but raw mysqldump command. The size of the DB could be over 2GB. Most of the data of this dump are cache tables and logs. Editing this file is not a good choice.

Current solution will remove INSERTS from the file. sed command come in handy here:

Imagine, that you have float field with 2 symbols after dot.
At the views page with filter you need to filter values by all range of module of user's float input.
Ex: user input 2.45, we filter all values  X>=2 AND X<(2+1)

With the standard accessories of views you can filter with two filter “from” and “to”. But in FO we have only one field.
To solve this problem we can use hook_views_query_alter.

We already have a view. To make our hook work, we must set the unique tag to the view, to check it in out hook. mymodule_query in example code.

This error caused module error, admin interface break-up, features etc.

https://www.drupal.org/node/1716470

At this thread propose to check if module views_ui is turned on. Of course it's on!

Another solutions is to comment out lines where file attached. But it's bad idea.