If you had a foreign key set and then decided to add `on_delete:
:cascade` later in another migration that migration would run but
wouldn't refresh the schema dump.
The reason for this was because `create_table_info` caches the statement
and sets it to be the same as the original declaration for the foreign
key (without the `on_delete: :cascade`.
PR #25307 ended up fixing this bug because it removes the check for
`create_table_info` and relies on reading from `information_schema`. The
fix however was intended to patch another bug. The reason this fixes the
issue is we're no longer parsing the regex from the cached
`create_table_info`.
This regression test is to ensure that the issue does not return if we
for some reason go back to using `create_table_info` to set the foreign
keys.
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.
This reverts commit 7ea502ae141fc26b736c7a73bdf7a676b1f9fc87, per
internal discussion with @sgrif -- this is documenting the
implementation of a class that isn't intended to be public API.
The implementation from abstract/database_statements.rb seems to work just fine.
And with ActiveRecord::Result now implementing an optimized #first method, the
performance concerns previously addressed in
bf79aa4fc1
should not be an issue.
Currently `Type::Date#serialize` does not cast a value to a date object.
It should be cast to a date object for finding by date column correctly
working.
Fixes#25354.
`FinderMethods#exists?` should return a boolean rather than raising an
exception.
`UniquenessValidator#build_relation` catches a `RangeError` because it
includes type casting due to a string value truncation. But a string
value truncation was removed at #23523 then type casting in
`build_relation` is no longer necessary. aa06231 removes type casting in
`build_relation` then a `RangeError` moves to `relation.exists?`.
This change will remove the catching a `RangeError`.
Before we enable query caching we check if the connection is
connected. Before this fix we were always checking against the main
connection, and not the model connection.
We're going to be experimenting with a new bot for them. This will not
cause anything to start affecting new PRs yet, but it will have data
sent to them so they can do "dry run" stuff on their end.
The rubocop file is based on our documented style guide. I've only
included rules which are either already consistently applied throughout
the entire codebase, or where added lines should be following the
guideline regardless of the surrounding code (such as hash syntax)
`construct_relation_for_association_calculations` pass a string value to
`construct_join_dependency` when setting a string value in `from`.
It should not pass a string value, but always `joins_values`.
Related #14834, #19452.
Fixes#24193.
Previously model file was generated first, which resulted in
inheriting from `ActiveRecord::Base`, but since application_record.rb
is generated as well, it should already be used.
We were declaring in a few tests, which depending of
the order load will cause an error, as the super class could change.
see ac1c4e141b (commitcomment-17731383)
As part of refactoring mutation detection to be more performant, we
introduced the concept of `original_value` to `Attribute`. This was not
overridden in `Attribute::Uninitialized` however, so assigning ot an
uninitialized value and calling `.changed?` would raise
`NotImplementedError`.
We are using a sentinel value rather than checking the result of
`original_attribute.initialized?` in `changed?` because `original_value`
might go through more than one node in the tree.
Fixes#25228
Currently CI is broken due to 56a61e0 and c4cb686. This occurred because
the failures are not present on SQLite which is what I normally run
locally before pushing.
The optimizations to our YAML size were dropping mutations, as
`with_type` didn't set the previous value if it'd already been read
(that method was never really designed to be used with values on
individual objects, it was previously only used for defaults). I'm
questioning whether there's a better place to be handling the exclusion
of the type, but this will fix the failing build.
Additionally, there was a bug in `remove_foreign_key` if you passed it
an options hash containing `to_table`. This now occurs whenever removing
a reference, as we always normalize to a hash.
[Sean Griffin & Ryuta Kamizono]
This reduces the size of a YAML encoded Active Record object by ~80%
depending on the number of columns. There were a number of wasteful
things that occurred when we encoded the objects before that have
resulted in numerous wins
- We were emitting the result of `attributes_before_type_cast` as a hack
to work around some laziness issues
- The name of an attribute was emitted multiple times, since the
attribute objects were in a hash keyed by the name. We now store them
in an array instead, and reconstruct the hash using the name
- The types were included for every attribute. This would use backrefs
if multiple objects were encoded, but really we don't need to include
it at all unless it differs from the type at the class level. (The
only time that will occur is if the field is the result of a custom
select clause)
- `original_attribute:` was included over and over and over again since
the ivar is almost always `nil`. We've added a custom implementation
of `encode_with` on the attribute objects to ensure we don't write the
key when the field is `nil`.
This isn't without a cost though. Since we're no longer including the
types, an object can find itself in an invalid state if the type changes
on the class after serialization. This is the same as 4.1 and earlier,
but I think it's worth noting.
I was worried that I'd introduce some new state bugs as a result of
doing this, so I've added an additional test that asserts mutation not
being lost as the result of YAML round tripping.
Fixes#25145
The code incorrectly assumes that the option was written as
`foreign_key: true`, but that is not always the case. This now mirrors
the behavior of reverting `add_foreign_key`. The code was changed to use
kwargs while I was touching it, as well.
This could really use a refactoring to go through the same code paths as
`add_refernce` in the future, so we don't duplicate default values.
Fixes#25169
Prior to this change, we would get collisions if Active Record objects
of different classes with the same ID were used as keys of the same
hash. It bothers me slightly that we have to allocate inside of this
method, but Ruby doesn't provide any way to hash multiple values without
allocation
Follow up of #20815.
```ruby
class CreatePeople < ActiveRecord::Migration[5.0]
def change
create_table :people do |t|
t.integer :int
t.bigint :bint
t.text :txt
t.binary :bin
end
end
end
```
Result.
In postgresql and sqlite3 adapters:
```ruby
ActiveRecord::Schema.define(version: 20160531141018) do
create_table "people", force: :cascade do |t|
t.integer "int"
t.bigint "bint"
t.text "txt"
t.binary "bin"
end
end
```
In mysql2 adapter:
```ruby
ActiveRecord::Schema.define(version: 20160531141018) do
create_table "people", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4" do |t|
t.integer "int"
t.bigint "bint"
t.text "txt", limit: 65535
t.binary "bin", limit: 65535
end
end
```
After this patch:
```ruby
ActiveRecord::Schema.define(version: 20160531141018) do
create_table "people", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4" do |t|
t.integer "int"
t.bigint "bint"
t.text "txt"
t.binary "bin"
end
end
```
This behavior was broken by 36e9be85. When the value is assigned
directly, either through mass assignment or directly assigning a hash,
the hash gets passed through to this writer method directly. While this
is intended to handle certain cases, when an explicit converter has been
provided, we should continue to use that instead. The positioning of the
added guard caused the new behavior to override that case.
Fixes#25210
Currently `exists?` does some hackery where it assumes that we can join
onto anything that we passed to `eager_load` or `includes`, which
doesn't work if we are joining onto a polymorphic association.
Actually figuring out if we want to include something would require
knowledge deep within the join dependency module, which is hard to pull
up. The simplest solution is just to pass a flag down that says we're
not actually going to try to eager load any of the data. It's not the
solution I'd like, but that code really needs to be untangled before we
can do much with it.
This is another attempt at 6d5b1fd which should address the concerns
that led to reverting it in 4ecabed.
The `#[]` method *used to be* an alias of `#read_attribute`, but since Rails 4
(10f6f90d9d1bbc9598bffea90752fc6bd76904cd), it will raise an exception for
missing attributes. Saying that it is an alias is confusing.
After PR https://github.com/rails/rails/pull/24844 the documentation for
`#retrieve_connection_pool` was out of date. This commit changes:
- the reference from `@class_to_pool` to `@owner_to_pool`.
- with newer Rubies, `#fetch` isn't significantly slower than `#[]`. Since Rails 5
requires Ruby >= 2.2.2, we can just use `#fetch` here.
Ruby 2.4 unifies Fixnum and Bignum into Integer: https://bugs.ruby-lang.org/issues/12005
* Forward compat with new unified Integer class in Ruby 2.4+.
* Backward compat with separate Fixnum/Bignum in Ruby 2.2 & 2.3.
* Drops needless Fixnum distinction in docs, preferring Integer.
If a call to #suppress from the same class occurred inside another #suppress
block, the suppression state would be set to false before the outer block
completes.
This change keeps the previous state around in memory and unwinds it
as the blocks exit.
The error message that we give today makes this error difficult to debug
if you receive it. I have no clue why we're printing the object ID of
the class (the commit doesn't give context), but I've left it as it was
deliberate.
When looking for mutation, we compare the serialized version of the
value to the before_type_cast form. `Type::Serialized` was breaking this
contract by passing the already serialized attribute to the subtype's
mutation detection. This never manifested previously, as all mutable
subtypes either didn't do anything in their `serialize` method, or had a
way to detect double serialization (e.g. `is_a?(String)`). However, now
that JSON types can handle string primitives, we need to avoid double
serialization.
Fixes#24993.
`remove_connection` can reset the `connection_specification_name`, so we
need to to set it after the remove_connection call on
`establish_connection` method.
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.
Follow up of #24844.
The key of `@owner_to_pool` was changed from `klass.name` to
`spec.name`. By this change "memory leaks in development mode"
will not happen, bacause the equality of string is not changed
by reloading of model files.
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.
If an attribute was of the binary type, and also was a Hash, it would
previously not be logged, and instead raise an error saying that
`bytesize` was not defined for the `attribute.value` (a `Hash`).
Now, as is done on 4-2-stable, the attribute's database value is
`bytesize`d, and then logged out to the terminal.
Reproduction script:
```ruby
require 'active_record'
require 'minitest/autorun'
require 'logger'
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Schema.define do
create_table :posts, force: true do |t|
t.binary :preferences
end
end
class Post < ActiveRecord::Base
serialize :preferences
end
class BugTest < Minitest::Test
def test_24955
Post.create!(preferences: {a: 1})
assert_equal 1, Post.count
end
end
```
The command line flag "-v ON_ERROR_STOP=1" should be used when invoking psql to make sure errors are not suppressed.
Example: psql -v ON_ERROR_STOP=1 -q -f awesome-file.sql my-app-db
Fixes#23818.
In 5.0 we use bind parameters for limit and offset, while in 4.2 we used
the values directly. The code as it was written assumed that limit and
offset worked as `LIMIT ? OFFSET ?`. Both Oracle and SQL Server have a
different syntax, where the offset is stated before the limit. We
delegate this behavior to the connection adapter so that these adapters
are able to determine how the bind parameters are flattened based on
what order their specification has the various clauses appear.
Fixes#24775
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.
After fb898e9, the `before_destroy` had some code that used
SQL interpolation left over. Don't think we should promote
that even if the values aren't directly from user input.
