| Commit message (Collapse) | Author | Age | Files | Lines |
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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This method appears to have been partially used in connection pool
caching, but it was introduced without much reasoning or any tests. One
edge case test was added later on, but it was focused on implementation
details. This method is no longer used outside of tests, and as such is
removed.
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Instead of passing a separete name variable, we can make the resolver
merge a name on the config, and use that before creating the Specification.
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When calling remove_connection in a subclass, that should not fallback
to the parent, otherwise it will remove the parent connection from the
handler.
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Dont cache the conn_spec_name when empty
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We cannot cache the connection_specification_name when it doesnt
exist. Thats because the parent value could change, and we should keep
failling back to the parent. If we cache that in a children as an ivar,
we would not fallback anymore in the next call, so the children would
not get the new parent spec_name.
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`remove_connection` can reset the `connection_specification_name`, so we
need to to set it after the remove_connection call on
`establish_connection` method.
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remove_connection
When calling `remove_connection` on a model, we delete the pool so we also
need to reset the `connection_specification_name` so it will fallback to
the parent.
This was the current behavior before rails 5, which will fallback to the
parent connection pool.
[fixes #24959]
Special thanks to @jrafanie for working with me on this fix.
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Some slight documentation edits and fixes. Also, run remove unnecessary
`RuntimeError`.
r? @arthurnn
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ConnectionHandler will not have any knowlodge of AR models now, it will
only know about the specs.
Like that we can decouple the two, and allow the same model to use more
than one connection.
Historically, folks used to create abstract AR classes on the fly in
order to have multiple connections for the same model, and override the
connection methods.
With this, now we can override the `specificiation_id` method in the
model, to return a key, that will be used to find the connection_pool
from the handler.
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Follow up to #22642.
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The focus of this change is to make the API more accessible.
References to method and classes should be linked to make it easy to
navigate around.
This patch makes exzessiv use of `rdoc-ref:` to provide more readable
docs. This makes it possible to document `ActiveRecord::Base#save` even
though the method is within a separate module
`ActiveRecord::Persistence`. The goal here is to bring the API closer to
the actual code that you would write.
This commit only deals with Active Record. The other gems will be
updated accordingly but in different commits. The pass through Active
Record is not completely finished yet. A follow up commit will change
the spots I haven't yet had the time to update.
/cc @fxn
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Renamed `@reserved_connections` -> `@thread_cached_conns`. New name
clearly conveys the purpose of the cache, which is to speed-up
`#connection` method.
The new `@thread_cached_conns` now also uses `Thread` objects as keys
(instead of previously `Thread.current.object_id`).
Since there is no longer any synchronization around
`@thread_cached_conns`, `disconnect!` and `clear_reloadable_connections!`
methods now pre-emptively obtain ownership (via `checkout`) of all
existing connections, before modifying internal data structures.
A private method `release` has been renamed `thread_conn_uncache` to
clear-up its purpose.
Fixed some brittle `thread.status == "sleep"` tests (threads can go
into sleep even without locks).
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Preserving RACK_ENV behavior.
This reverts commit 7bdc7635b885e473f6a577264fd8efad1c02174f, reversing
changes made to 45786be516e13d55a1fca9a4abaddd5781209103.
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[ci skip]
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`Rails` constant is added by rails-html-sanitizer leading to bugs in
non-Rails apps using ActiveRecord and ActionMailer
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This fixes a regression introduced by 6cc03675d30b58e28f585720dad14e947a57ff5b.
ActiveRecord, if used without Rails, always checks the "default_env" environment. This would be OK, except that Sinatra also supports environments,
and it runs with {RACK|RAILS}_ENV=production. This patch adds a fallback to RAILS_ENV and RACK_ENV (and ultimately default_env) if Rails.env doesn't exist.
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The "DATABASE_URL_*" idea was moving in the wrong direction.
Instead, let's deprecate the situation where we end up using
ENV['DATABASE_URL'] at all: the Right Way is to explicitly include it in
database.yml with ERB.
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This seems to simplify the operative part. Most importantly, by
pre-loading all the configs supplied in ENV, we ensure the list is
complete: if the developer specifies an unknown config, the exception
includes a list of valid ones.
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configuration
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As we like ENV vars, also support DATABASE_URL_#{env}, for more obscure
use cases.
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Two bits of example code use sqlite as an adapter, which doesn't exist.
Using the code verbatim will raise a LoadError exception:
ActiveRecord::Base.establish_connection(
"adapter" => "sqlite",
"database" => "db.sqlite"
)
# => LoadError: Could not load 'active_record/connection_adapters/sqlite_adapter'...
Considering this is code a lot of people new to Rails might be running,
it's especially confusing.
Closes #14367 [ci skip]
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If using a `DATABASE_URL` and a `database.yml`. The connection information in `DATABASE_URL` should be merged into whatever environment we are in. As released in 4.1.0rc1 if someone has a database.yml but is missing a key like production:
```yml
development:
host: localhost
```
Then the check for blank config will return false so the information from the `DATABASE_URL` will not be used when attempting to connect to the `production` database and the connection will incorrectly fail.
This commit fixes this problem and adds a test for the behavior.
In addition the ability to specify a connection url in a `database.yml` like this:
```
production: postgres://localhost/foo
```
Was introduced in 4.1.0rc1 though should not be used, instead using a url sub key
```
production:
url: postgres://localhost/foo
```
This url sub key was also introduced in 4.1.0rc1 though the `production: postgres://localhost/foo` was not removed. As a result we should not test this behavior.
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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.
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This commit also cleans up the rake tasks that were checking
for DATABASE_URL in different places.
In fact, it would be nice to deprecate DATABASE_URL usage in the long
term, considering the direction we are moving of allowing those in .yml
files.
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Registries have class-level accessors to write clean code, let's
use them. This makes style uniform also with existing usage in
ScopeRegistry and InstrumentationRegistry.
If performance of the method_missing callback was ever considered to
be a concern, then we should stop using it altogether and probably
remove the callback. But while we have the feature we should use it.
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In the end I think the pain of implementing this seamlessly was not
worth the gain provided.
The intention was that it would allow plain ruby objects that might not
live in your main application to be subclassed and have persistence
mixed in. But I've decided that the benefit of doing that is not worth
the amount of complexity that the implementation introduced.
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* Loop rather than recurse in retrieve_connection_pool
* Key the hash by class rather than class name. This avoids creating
unnecessary strings.
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Get rid of ActiveModel::Configuration, make better use of
ActiveSupport::Concern + class_attribute, etc.
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