Getting:
An error has occurred:
Error connecting to the server: fe_sendauth: no password supplied
Settings in database.yml are the same as the app setup on other machines.
How can I set things up so that I don't need a password hardcoded?
I can view the db ok using PgAdmin-III.
I'd rather not have the password in database.yml as other machines using this app don't have/need it, so it seems likely to be something about my Pg install.
You need to change your change your pg_hba.conf. Here's an example of mine:
pg_hba.conf:
TYPE DATABASE USER ADDRESS METHOD
host all all 127.0.0.1/32 trust
host all PC 127.0.0.1/32 trust
host all all ::1/128 trust
Note that trust means that anyone on address (in this case localhost) can connect as the listed user (or in this case any user of their choice). This is really only suitable for development configurations with unimportant data. Do not use this in production.
@rodrigo-zurek was spot on; you have to change the pg_hba.conf. Just want to add this answer for the OSX users because the pg_hba.conf is located in a different place by default.
sudo su - postgres
vim /Library/PostgreSQL/<YOUR_VERSION>/data/pg_hba.conf
The default will have md5 in the column METHOD, but replace all of those with trust:
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all trust
# IPv4 local connections:
host all all 127.0.0.1/32 trust
# IPv6 local connections:
host all all ::1/128 trust
Then, open up pgAdmin III inside your Applications/PostgreSQL 9.X, right click the database (e.g. PostgreSQL 9.4 (localhost)), and click Reload Configuration. After this, I was able to rake db:create.
No password supplied means you have set it up to require password authentication and no password is being supplied. Here is documentation for 9.0: http://www.postgresql.org/docs/9.0/static/auth-methods.html
Keep in mind that local auth was changed from "ident" to "peer" in 9.1 to avoid confusion. See the 9.1 docs at http://www.postgresql.org/docs/9.1/static/auth-methods.html
Also keep in mind that this is an ordered rule set with first match governing. Furthermore local and localhost are different. Local is for local UNIX domain socket connections, while host localhost would be for network connections to localhost. So it sounds like you have some troubleshooting to do but hopefully the docs should help.
#appveyor.yml
services: postgresql
test_script:
- SET PGUSER=postgres
- SET PGPASSWORD=Password12!
- PATH=C:\Program Files\PostgreSQL\9.6\bin\;%PATH%
