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Properly handle cached queries with too many bind parameters
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as leaked
This deprecates using class level querying methods if the receiver scope
regarded as leaked, since #32380 and #35186 may cause that silently
leaking information when people upgrade the app.
We need deprecation first before making those.
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kamipo/fix_leaking_scope_on_relation_create"
This reverts commit b67d5c6dedbf033515a96a95d24d085bf99a0d07, reversing
changes made to 2e018361c7c51e36d1d98bf770b7456d78dee68b.
Reason: #35186 may cause that silently leaking information when people
upgrade the app.
We need deprecation first before making this.
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eileencodes/add-setter-and-deprecation-for-configurations-hashes
Add setter and deprecation for configurations hashes
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In chat Sam Saffron asked how to use the setter now that configurations
is no longer a hash and you need to do AR::Base.configurations["test"]=.
Technically you can do `ActiveRecord::Base.configurations = { the hash
}` but I realized the old way throws an error and is unintuitive.
To aid in the transition from hashes to objects this PR makes a few
changes:
1) Re-adds a deprecated hash setter `[]=` that will add a new hash
to the configurations list OR replace an existing hash if that
environment is already present. This won't be supported in future Rails
versions but a good error is important.
2) Changed to throw deprecation warnings on the methods we decided to support
for hash conversion and raise on the methods we don't support.
3) Refactored the setter/getter hash deprecation warnings messages and
rewrote them.
Getters message:
```
DEPRECATION WARNING: `ActiveRecord::Base.configurations` no longer
returns a hash. Methods that act on the hash like `values` are
deprecated and will be removed in Rails 6.1. Use the `configs_for`
method to collect and iterate over the database configurations.
```
Setter message:
```
DEPRECATION WARNING: Setting `ActiveRecord::Base.configurations` with
`[]=` is deprecated. Use `ActiveRecord::Base.configurations=` directly
to set the configurations instead.
```
4) Rewrote the legacy configurations test file to test all the public
methods in the DatabaseConfigurations class.
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methods"
This reverts #32380, since this may cause that silently leaking
information when people upgrade the app.
We need deprecation first before making this.
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Fix database configurations building when DATABASE_URL present
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This reverts commit eec3e28a1abf75676dcee58308ee5721bb53c325, reversing
changes made to 5588fb4802328a2183f4a55c36d6703ee435f85c.
Reason: Marking as loaded without actual loading is too greedy optimization.
See more context #35239.
Closes #35239.
[Edouard CHIN & Ryuta Kamizono]
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Fixed the CI failure https://travis-ci.org/rails/rails/jobs/492291248#L1185-L1191.
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Currently custom attributes are always qualified by the table name in
the generated SQL wrongly even if the table doesn't have the named
column, it would cause an invalid SQL error.
Custom attributes should only be qualified if the table has the same
named column.
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The implicit delegation in the migration class is to be logged. It is
not intended in the migration compatibility, so it should be avoided.
Fixes #35224.
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Clarify collection proxy docs
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The docs for `ActiveRecord::Associations::CollectionProxy` describe
`ActiveRecord::Associations::Association`. I've moved them to
association and rewrote collection proxy's docs to be more applicable to
what the class actually does.`
[ci skip]
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I implemented Foreign key create in `create_table` for SQLite3 at
#24743. This follows #24743 to implement `add_foreign_key` and
`remove_foreign_key`.
Unfortunately SQLite3 has one limitation that
`PRAGMA foreign_key_list(table-name)` doesn't have constraint name.
So we couldn't implement find/remove foreign key by name for now.
Fixes #35207.
Closes #31343.
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Do not allow to add column without column name
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It makes to ease to handle all short-hand methods (e.g. validates
arguments etc).
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`Association#target=` invokes `loaded!`, so we no longer need to call
the `loaded!` explicitly.
Since Preloader is private API, we don't guarantee that it behaves like
older version as long as using Preloader directly. But this refactoring
fortunately also fix the Preloader compatibility issue #35195.
Closes #35195.
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Fix elapsed time calculations
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I've found a few places in Rails code base where I think it makes sense
to calculate elapsed time more precisely by using
`Concurrent.monotonic_time`:
- Fix calculation of elapsed time in `ActiveSupport::Cache::MemoryStore#prune`
- Fix calculation of elapsed time in
`ActiveRecord::ConnectionAdapters::ConnectionPool::Queue#wait_poll`
- Fix calculation of elapsed time in
`ActiveRecord::ConnectionAdapters::ConnectionPool#attempt_to_checkout_all_existing_connections`
- Fix calculation of elapsed time in `ActiveRecord::ConnectionAdapters::Mysql2Adapter#explain`
See
https://docs.ruby-lang.org/en/2.5.0/Process.html#method-c-clock_gettime
https://blog.dnsimple.com/2018/03/elapsed-time-with-ruby-the-right-way
Related to 7c4542146f0dde962205e5a90839349631ae60fb
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Fix `relation.exists?` with giving both `distinct` and `offset`
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The `distinct` affects (reduces) rows of the result, so it is important
part when both `distinct` and `offset` are given.
Replacing SELECT clause to `1 AS one` and removing `distinct` and
`order` is just optimization for the `exists?`, we should not apply the
optimization for that case.
Fixes #35191.
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Bugfix has_many association #size when ids reader is cached and assoc…
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is changed
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Relation is not best place to do this.
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Improve naming in DatabaseSelector
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We're already in the resolver, we call this class "operations" in the
middleware, so we should use the same naming here.
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This is more consistent with Resolver, which has build called. This
allows using a Proc instead of a class, which could be nice if you need
to vary switching logic based on the request in a more ad-hoc way (ie.
check if it is an API request).
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callbacks
`relation.create` populates scope attributes to new record by `scoping`,
it is necessary to assign the scope attributes to the record and to find
STI subclass from the scope attributes.
But the effect of `scoping` is class global, it was caused undesired
behavior that pollute all class level querying methods in initialization
block and callbacks (`after_initialize`, `before_validation`,
`before_save`, etc), which are user provided code.
To avoid the leaking scope issue, restore the original current scope
before initialization block and callbacks are invoked.
Fixes #9894.
Fixes #17577.
Closes #31526.
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Don't use `false` as special value to skip to find inherited scope, we
could use `skip_inherited_scope = true`, and move `_scoping` back on
Relation.
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Formerly it was returning arguments (`records` array).
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Speed up partial rendering by caching "variable" calculation
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This commit speeds up rendering partials by caching the variable name
calculation on the template. The variable name is based on the "virtual
path" used for looking up the template. The same virtual path
information lives on the template, so we can just ask the cached
template object for the variable.
This benchmark takes a couple files, so I'll cat them below:
```
[aaron@TC ~/g/r/actionview (speed-up-partials)]$ cat render_benchmark.rb
require "benchmark/ips"
require "action_view"
require "action_pack"
require "action_controller"
class TestController < ActionController::Base
end
TestController.view_paths = [File.expand_path("test/benchmarks")]
controller_view = TestController.new.view_context
result = Benchmark.ips do |x|
x.report("render") do
controller_view.render("many_partials")
end
end
[aaron@TC ~/g/r/actionview (speed-up-partials)]$ cat test/benchmarks/test/_many_partials.html.erb
Looping:
<ul>
<% 100.times do |i| %>
<%= render partial: "list_item", locals: { i: i } %>
<% end %>
</ul>
[aaron@TC ~/g/r/actionview (speed-up-partials)]$ cat test/benchmarks/test/_list_item.html.erb
<li>Number: <%= i %></li>
```
Benchmark results (master):
```
[aaron@TC ~/g/r/actionview (master)]$ be ruby render_benchmark.rb
Warming up --------------------------------------
render 41.000 i/100ms
Calculating -------------------------------------
render 424.269 (± 3.5%) i/s - 2.132k in 5.031455s
```
Benchmark results (this branch):
```
[aaron@TC ~/g/r/actionview (speed-up-partials)]$ be ruby render_benchmark.rb
Warming up --------------------------------------
render 50.000 i/100ms
Calculating -------------------------------------
render 521.862 (± 3.8%) i/s - 2.650k in 5.085885s
```
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This follows up d97980a16d76ad190042b4d8578109714e9c53d0.
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Active Record uses `scoping` to delegate to named scopes from relations
for propagating the chaining source scope. It was needed to restore the
source scope in named scopes, but it was caused undesired behavior that
pollute all class level querying methods.
Example:
```ruby
class Topic < ActiveRecord::Base
scope :toplevel, -> { where(parent_id: nil) }
scope :children, -> { where.not(parent_id: nil) }
scope :has_children, -> { where(id: Topic.children.select(:parent_id)) }
end
# Works as expected.
Topic.toplevel.where(id: Topic.children.select(:parent_id))
# Doesn't work due to leaking `toplevel` to `Topic.children`.
Topic.toplevel.has_children
```
Since #29301, the receiver in named scopes has changed from the model
class to the chaining source scope, so the polluting class level
querying methods is no longer required for that purpose.
Fixes #14003.
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Bugfix association loading behavior when counter cache is zero
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Relax sqlite3 version dependency
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With this benchmark:
require "bundler/setup"
require "active_record"
require "benchmark/ips"
# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Schema.define do
create_table :posts, force: true do |t|
end
end
class Post < ActiveRecord::Base
end
new_post = Post.new
Benchmark.ips do |b|
b.report("present?") do
new_post.present?
end
b.report("blank?") do
new_post.blank?
end
end
Before:
Warming up --------------------------------------
present? 52.147k i/100ms
blank? 53.077k i/100ms
Calculating -------------------------------------
present? 580.184k (±21.8%) i/s - 2.555M in 5.427085s
blank? 601.537k (± 9.2%) i/s - 2.972M in 5.003503s
After:
Warming up --------------------------------------
present? 378.235k i/100ms
blank? 375.476k i/100ms
Calculating -------------------------------------
present? 17.381M (± 7.5%) i/s - 86.238M in 5.001815s
blank? 17.877M (± 6.4%) i/s - 88.988M in 5.004634s
This improvement is mostly because those methods were hitting
`method_missing` on a lot of levels to be able to return the value.
To avoid all this stack walking we are short-circuiting those methods.
Closes #35059.
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eileencodes/fix-query-cache-for-database-switching
Invalidate all query caches for current thread
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