from 3.1-x to 3.1-y

This section describes how to upgrade your existing eZ Publish 3.1-x installation to version 3.1-y, for example from 3.1.0 rel1 to 3.1-2. If you are upgrading from a version prior to eZ Publish 3.1.0 rel1, you should first upgrade to 3.1.0 rel1 before you can upgrade to 3.1-2.

Please make sure that you have a working backup of the site before you do the actual upgrade. The upgrade procedure consists of the following steps:

Upgrading the distribution files to 3.1-2
Upgrading the database to 3.1-2
Running the system upgrade scripts
Updating the system configuration
Clearing the caches

Step 1: Upgrading the distribution files

The easiest way to upgrade the distribution files is to unpack eZ Publish 3.1-2 to a directory and then copy the directories that contain site-specific files from the existing installation. Make sure that you copy the following directories:

design/example
design/example_admin
var
settings/siteaccess
settings/override

Replace "example" and "example_admin" with actual names used by your siteaccesses.

Custom extensions

If you are using custom extensions then the subdirectories inside the "extension" directory will also have to be copied. However, make sure that you do not overwrite any extensions that come with eZ Publish (for example the "PayPal" extension).

Step 2: Upgrading the database

To upgrade 3.1.0 rel1 database to 3.1-2, you should navigate into the eZ Publish 3.1-2 directory and run the following database upgrade scripts one after another:

dbupdate-3.1.0-1-to-3.1.0-2.sql
dbupdate-3.1.0-2-to-3.1-1.sql

MySQL

The database upgrade scripts are located in the "update/database/mysql/3.1/" directory of your eZ Publish installation. Each of these scripts can be launched using the following shell command:

mysql -u<username> -p<password> <database> < update/database/mysql/3.1/dbupdate-version1-to-version2.sql

PostgreSQL

The database upgrade scripts are located in the "update/database/postgresql/3.1/" directory of your eZ Publish installation. Each of these scripts can be launched using the following shell command:

psql -d <database> -U <dbowner> < update/database/postgresql/3.1/dbupdate-version1-to-version2.sql

Step 3: Running the system upgrade scripts

There are no upgrade scripts for upgrading from 3.1-x to 3.1-y. However, if you haven't run the "generateoverridesettings.php" script before (when upgrading to 3.1.0 rel1), then it needs to be run for each of your siteaccesses (replace "example" with the actual name of your siteaccess):

php update/common/scripts/generateoverridesettings.php -s example

The script will output a suggestion for the siteaccess "override.ini.append.php" file that needs to be created for the specified siteaccess. You should create a new file called "override.ini.append.php" in the "settings/siteaccess/example" directory (replace "example" by the actual name of your siteaccess) and copy the output provided by the script to this file.

Step 4: Updating the system configuration

You are not required to do any configuration changes when upgrading from 3.1-x to 3.1-y.

Step 5: Clearing the caches

Whenever an eZ Publish solution is upgraded, all caches must be cleared in a proper way. This should be done from within a system shell:

Navigate into the eZ Publish 3.1-2 directory.
Run the clear cache script:
```
bin/shell/clearcache.sh --clear-all
```

Please make sure that all caches are cleared. Sometimes the script is unable to clear caches because of restrictive file/directory permission settings. Make sure that all caches have been cleared by inspecting the contents of the various cache subdirectories within the "var" directory.