Using 'boot2docker ip' in your database.yml?

Question

I'd like to use something like the following in my database.yml:

host: %x(boot2docker ip)

However, whenever I do this, I get back something like the following error:

RuntimeError (YAML syntax error occurred while parsing ...-database.yml. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Error: (<unknown>): found character that cannot start any token while scanning for the next token at line 12 column 9):

It seems clear to me that it's something about the way that boot2docker is responding with the ip is wrong, adding a newline or similar. I could put this somewhere else, but it seems right just to do it inline - is there an elegant (one line) way to do this?

@DaveNewton right, but rails does do some interpretation - eg it supports template structures — aronchick, Apr 19 '15 at 22:19
sounds like a yaml syntax error, verify your yaml with yaml validator or yamllint — resultsway, Apr 19 '15 at 22:38
if you put in an ip address in there, like host: 10.10.10.10, does the error go away or still occur? — Greg, Apr 20 '15 at 00:27

score 0 · Answer 1 · answered Apr 20 '15 at 00:28

0

maybe your yaml parser needs a double quote:

host: "%x(boot2docker ip)"

answered Apr 20 '15 at 00:28

Greg

6,571
2
27
39

aronchick · Accepted Answer · 2015-04-21T05:30:42.717

0

Turns out that database.yml is not a ruby file, it is just raw yml, in which templating works. If I want to execute ruby, I need to escape it.

The answer here was the following:

host: <%= %x(boot2docker ip) %>

edited Apr 21 '15 at 05:30

answered Apr 20 '15 at 15:51

aronchick

6,786
9
48
75

Using 'boot2docker ip' in your database.yml?

2 Answers2