Currently Active Record can be configured via the environment variable `DATABASE_URL` or by manually injecting a hash of values which is what Rails does, reading in `database.yml` and setting Active Record appropriately. Active Record expects to be able to use `DATABASE_URL` without the use of Rails, and we cannot rip out this functionality without deprecating. This presents a problem though when both config is set, and a `DATABASE_URL` is present. Currently the `DATABASE_URL` should "win" and none of the values in `database.yml` are used. This is somewhat unexpected to me if I were to set values such as `pool` in the `production:` group of `database.yml` they are ignored.
There are many ways that active record initiates a connection today:
- Stand Alone (without rails)
- `rake db:<tasks>`
- ActiveRecord.establish_connection
- With Rails
- `rake db:<tasks>`
- `rails <server> | <console>`
- `rails dbconsole`
We should make all of these behave exactly the same way. The best way to do this is to put all of this logic in one place so it is guaranteed to be used.
Here is my prosed matrix of how this behavior should work:
```
No database.yml
No DATABASE_URL
=> Error
```
```
database.yml present
No DATABASE_URL
=> Use database.yml configuration
```
```
No database.yml
DATABASE_URL present
=> use DATABASE_URL configuration
```
```
database.yml present
DATABASE_URL present
=> Merged into `url` sub key. If both specify `url` sub key, the `database.yml` `url`
sub key "wins". If other paramaters `adapter` or `database` are specified in YAML,
they are discarded as the `url` sub key "wins".
```
### Implementation
Current implementation uses `ActiveRecord::Base.configurations` to resolve and merge all connection information before returning. This is achieved through a utility class: `ActiveRecord::ConnectionHandling::MergeAndResolveDefaultUrlConfig`.
To understand the exact behavior of this class, it is best to review the behavior in activerecord/test/cases/connection_adapters/connection_handler_test.rb though it should match the above proposal.
The build is broken: https://travis-ci.org/rails/rails/builds/15824530
This commit fixes it.
The problem: Sqlite expects the `database` part to be an absolute path. That prompted this change to be committed to master: fbb79b517f
This change provides correct behavior. Unfortunately tests were introduced in 971d5107cd that were relying on the incorrect behavior. We can avoid the fix by changing to another database url such as `mysql` or `postgresql`
In addition to fixing the failure, the assertions are changed so that the "expected" value comes before "actual" value.
Right now when you start a server via `rails s`, the logger gets extended so that it logs to the file system and also to stdout. This extension behavior is not "intelligent" and if the default logger is already set to output to stdout, then the contents will be received twice.
To capture logs in accordance with http://www.12factor.net/logs some platforms require the logs to be sent to standard out. If a logger is set to stdout, and the server is started using `rails server` instead of another method (i.e. `thin start` etc.) then the app will produce double logs.
This PR fixes the issue by only extending the logger to standard out in the development environment. So that in production you don't get double logs like this:
```
ActionView::Template::Error (wrong number of arguments (5 for 4)):
1: <% lang_index = 0 %>
2: <div class="row">
3: <ul class="nav nav-tabs nav-stacked span2" data-tabs="tabs" id="repo-tabs">
4: <% repos.group_by(&:language).each do |lang, repos| %>
5: <% unless lang == nil %>
6: <li><a href="#<%= "#{lang.parameterize}#{lang.hash}" %>" data-toggle="tab"><%= lang %></a></li>
7: <% end -%>
app/views/shared/_repos.html.erb:4:in `_app_views_shared__repos_html_erb___1685450633638247395_70300668607000'
app/views/pages/index.html.erb:13:in `_app_views_pages_index_html_erb__2084723628308867770_70300687584880'
ActionView::Template::Error (wrong number of arguments (5 for 4)):
1: <% lang_index = 0 %>
2: <div class="row">
3: <ul class="nav nav-tabs nav-stacked span2" data-tabs="tabs" id="repo-tabs">
4: <% repos.group_by(&:language).each do |lang, repos| %>
5: <% unless lang == nil %>
6: <li><a href="#<%= "#{lang.parameterize}#{lang.hash}" %>" data-toggle="tab"><%= lang %></a></li>
7: <% end -%>
app/views/shared/_repos.html.erb:4:in `_app_views_shared__repos_html_erb___1685450633638247395_70300668607000'
app/views/pages/index.html.erb:13:in `_app_views_pages_index_html_erb__2084723628308867770_70300687584880'
```
ATP Railties. Opened against master in favor of #10999
Allow environment name to start with a substring of the default
environment names.
For example: tes, pro, prod, dev, devel, etc.
Fixing identation.
Adding test for Rails::Console.parse_arguments method.
Fix issue 8628 for Rails::DBConsole.
This cleanup aims to fix a build failure:
https://travis-ci.org/rails/rails/jobs/3515951/#L482
Since travis always have both ENV vars set to "test", a test is failing
where it's expected to output the default env "development", but "test"
is the result due to RACK_ENV being set when we expect it to not be.
By cleaning this duplication we ensure that changing any of these env
variables will pick the right expected value.
When using sqlite3 it was attempting to find the database file based on
Rails.root, the problem is that Rails.root is not always present because
we try to first manually load "config/database.yml" instead of loading
the entire app, to make "rails db" faster.
This means that when we're in the root path of the app, calling "rails db"
won't allow us to use Rails.root, making the command fail for sqlite3
with the error:
./rails/commands/dbconsole.rb:62:in `start':
undefined method `root' for Rails:Module (NoMethodError)
The fix is to simply not pass any dir string to File.expand_path, which
will make it use the current directory of the process as base, or the
root path of the app, which is what we want.
When we are in any other subdirectory, calling "rails db" should work
just fine, because "config/database.yml" won't be found, thus "rails db"
will fallback to loading the app, making Rails.root available.
Closes#8257.
Rails uses sqlit3 db file with a path relative to the rails root. It
allows to execute server not from rails root only. For example you
can fire `./spec/dummy/script/rails s` to start dummy application
server if you develop some engine gem.
Now the `rails db` command uses relative paths also and you can explore
your dummy db via `./spec/dummy/script/rails db` command.
rails server takes `-e` as an argument to specify RAILS_ENV, rails console currently does not have the same interface. This commit fixes this disparity so developers can manually specify `RAILS_ENV` or can pass in an environment with a `-e`.
When launching rails server from the command line with a rails environment specified such as `rails server RAILS_ENV=production` an error would occur since rails will try to use `RAILS_ENV=production` as it's server.
When launching rails with a specified server such as thin `rails server thin RAILS_ENV=production` no error will be thrown, but rails will not start up in the specified environment.
This fixes both of those cases
