How to use a path relative to project root to H2 db-file configuration with Play Framework 2.4?
JdbcH2Relative PathPersistentPlayframework 2.4Jdbc Problem Overview
We're developing a Play 2.4 application (Java API).
For dev purposes, we'd like to use a persistent H2 database with DB file path relative to the project root directory.
In https://stackoverflow.com/questions/12292050/how-to-use-a-persistent-h2-database-in-the-play-framework-instead-of-in-memory there was solution for Play 2.0:
db.default.url="jdbc:h2:file:data/db"
However, with Play 2.4 this doesn't seem to work but I get error message with the following exception at the bottom:
Caused by: org.h2.jdbc.JdbcSQLException: A file path that is implicitly
relative to the current working directory is not allowed in the database
URL "jdbc:h2:file:data/db". Use an absolute path, ~/name, ./name, or the
baseDir setting instead. [90011-187]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
at org.h2.message.DbException.get(DbException.java:179)
...
I could get connection to work with an absolute path and with a path relative to the home directory, like the following:
db.default.url="jdbc:h2:file:/Users/foo/data/db"
or
db.default.url="jdbc:h2:~/data/db"
However, is there some way to refer to the project root folder?
Jdbc Solutions
Solution 1 - Jdbc
Ok, I did a little research and found this in the changelog (http://www.h2database.com/html/changelog.html):
> Implicit relative paths are disabled (system property "h2.implicitRelativePath"), so that the database URL jdbc:h2:test now needs to be written as jdbc:h2:./test.
In H2 starting from version 1.4.177 Beta, implicit relative paths are not allowed anymore. Therefore, in your case the url should be written with a explicit relative path: db.default.url="jdbc:h2:./data/db"
.
Solution 2 - Jdbc
> A fixed or relative path can be used. When using the URL jdbc:h2:file:./data/sample http://www.h2database.com/html/faq.html
now a relative path can be used.
for example,
jdbc:h2:file:./../../h2db;