UTF-8 Settings

Vikunja itself is always fully capable of handling utf-8 characters. However, your database might be not. Vikunja itself will work just fine until you want to use non-latin characters in your tasks/projects/etc.

On this page, you will find information about how to fully ensure non-latin characters like aüäß or emojis work with your installation.

Postgresql & SQLite #

Postgresql and SQLite should handle utf-8 just fine - If you discover any issues nonetheless, please drop us a message.

MySQL #

MySQL is not able to handle utf-8 by default. To fix this, follow the steps below.

To find out if your db supports utf-8, run the following in a shell or similar, assuming the database you're using for Vikunja is called vikunja:

SELECT default_character_set_name FROM information_schema.SCHEMATA WHERE schema_name = 'vikunja';

This will get you a result like the following:

+----------------------------+
| default_character_set_name |
+----------------------------+
| latin1                     |
+----------------------------+
1 row in set (0.001 sec)

The charset latin1 means the db is encoded in the latin1 encoding which does not support utf-8 characters.

(The following guide is based on this thread from stackoverflow)

0. Backup your database #

Before attempting any conversion, please back up your database.

1. Create a pre-conversion script #

Copy the following sql statements in a file called preAlterTables.sql and replace all occurrences of vikunja with the name of your database:

use information_schema;
SELECT concat("ALTER DATABASE `",table_schema,"` CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;") as _sql 
FROM `TABLES` where table_schema like 'vikunja' and TABLE_TYPE='BASE TABLE' group by table_schema;
SELECT concat("ALTER TABLE `",table_schema,"`.`",table_name,"` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;") as _sql  
FROM `TABLES` where table_schema like 'vikunja' and TABLE_TYPE='BASE TABLE' group by table_schema, table_name;
SELECT concat("ALTER TABLE `",table_schema,"`.`",table_name, "` CHANGE `",column_name,"` `",column_name,"` ",data_type,"(",character_maximum_length,") CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci",IF(is_nullable="YES"," NULL"," NOT NULL"),";") as _sql 
FROM `COLUMNS` where table_schema like 'vikunja' and data_type in ('varchar','char');
SELECT concat("ALTER TABLE `",table_schema,"`.`",table_name, "` CHANGE `",column_name,"` `",column_name,"` ",data_type," CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci",IF(is_nullable="YES"," NULL"," NOT NULL"),";") as _sql 
FROM `COLUMNS` where table_schema like 'vikunja' and data_type in ('text','tinytext','mediumtext','longtext');

2. Run the pre-conversion script #

Running this will create the actual migration script for your particular database structure and save it in a file called alterTables.sql:

mysql -uroot < preAlterTables.sql | egrep '^ALTER' > alterTables.sql

3. Convert the database #

At this point converting is just a matter of executing the previously generated sql script:

mysql -uroot < alterTables.sql

4. Verify it was successfully converted #

If everything worked as intended, your db collation should now look like this:

SELECT default_character_set_name FROM information_schema.SCHEMATA WHERE schema_name = 'vikunja';

Should get you:

+----------------------------+
| default_character_set_name |
+----------------------------+
| utf8mb4                    |
+----------------------------+
1 row in set (0.001 sec)
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