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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 still isn't as separated as I'd like, but it at least moves most of
the burden of alias mapping in one place.
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The commit which originally added this behavior did not consider that
doing `Subclass.new` does not actually populate the `type` field in the
attributes (though perhaps it should). We simply need to not use the
defaults for STI related things unless we are instantiating the base
class.
Fixes #23285.
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Closes #21986.
This makes it possible to write custom types that define a different
mapping for STI columns.
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[ci skip]
Q: What happens if you initialize an AR model by passing Parameters that
have not been whitelisted with `permit`?
A: An `ActiveModel::ForbiddenAttributesError` is raised.
I think this behavior is correct, and it's better than what used to happen,
with unpermitted parameter being simply ignored.
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This will also get the defaults from attribute definitions like:
attribute :type, :string, default: "SomethingElse"
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`has_attribute?` method to check wether a given attribute has been defined.
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STI cast new instances to `default type` on initialize.
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fixes #17121
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Add AC::Parameters tests for WhereChain#not
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We don't need to use `String#+` or create all the intermediate strings
to break a string into multiple lines. We can just write a c-style
multiline string literal. This is by no means a hotpath, but this is
clearer to me anyway.
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The first one is quite straightforward. We want to give the proper error
message in the case where a top level constant exists, but we're looking
for a nested one. We just need to port over the change to use
`subclass.name` into these changes.
The second set of failures, which are only present in the mysql adapter
tests, are stranger to me. The failure occurs because we were
previously comparing `subclass.name == self.name` instead of `subclass
== self`. However, I don't think that we need to support creating
anonymous classes which share a table with a class that uses STI,
overrides `name` to return the same name as athe class that we have no
other relationship with, when not assigned to a constant so it could
never be used anyway...
The commits around why that exist give no context, and I think they're
just poorly written tests (WTF does `test_schema` mean anyway, and why
does calling `.first` on some anonymous class test it?). We'll just
disable STI on that class.
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I'm making this commit separately because this has failing tests and
style nitpicks that I'd like to make as individual commits, to make the
changes I'm making explicit.
We still want a single merge commit at the end, however.
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the newer method used for discriminating new records did not
use the older and more robust method used for instantiating
existing records, but did have a better post-check to ensure
the sublass was in the hierarchy. so move the descendants check
to find_sti_class, and then simply call find_sti_class from
subclass_from_attributes
now with fixed specs
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This can resolve confusing situation when a top level constant exists
but a namespaced version is identified.
Related to #19531.
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If your STI class looks like this:
```ruby
class Company < ActiveRecord::Base
self.store_full_sti_class = false
class GoodCo < Company
end
class BadCo < Company
end
end
```
The expectation (which is valid) is that the `type` in the database is saved as
`GoodCo` or `BadCo`. However, another expectation should be that setting `type`
to `GoodCo` would correctly instantiate the object as a `Company::GoodCo`. That
second expectation is what this should fix.
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This reverts commit 5cfa6a8ab997089c3012a82052c8c317b2e095f5, reversing
changes made to bfd5bf8313e6ea0bb2eccb68ee5076bb63f0b2db.
Reason: This broken travis build.
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the newer method used for discriminating new records did not
use the older and more robust method used for instantiating
existing records, but did have a better post-check to ensure
the sublass was in the hierarchy. so move the descendants check
to find_sti_class, and then simply call find_sti_class from
subclass_from_attributes
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It's finally finished!!!!!!! The reason the Attributes API was kept
private in 4.2 was due to some publicly visible implementation details.
It was previously implemented by overloading `columns` and
`columns_hash`, to make them return column objects which were modified
with the attribute information.
This meant that those methods LIED! We didn't change the database
schema. We changed the attribute information on the class. That is
wrong! It should be the other way around, where schema loading just
calls the attributes API for you. And now it does!
Yes, this means that there is nothing that happens in automatic schema
loading that you couldn't manually do yourself. (There's still some
funky cases where we hit the connection adapter that I need to handle,
before we can turn off automatic schema detection entirely.)
There were a few weird test failures caused by this that had to be
fixed. The main source came from the fact that the attribute methods are
now defined in terms of `attribute_names`, which has a clause like
`return [] unless table_exists?`. I don't *think* this is an issue,
since the only place this caused failures were in a fake adapter which
didn't override `table_exists?`.
Additionally, there were a few cases where tests were failing because a
migration was run, but the model was not reloaded. I'm not sure why
these started failing from this change, I might need to clear an
additional cache in `reload_schema_from_cache`. Again, since this is not
normal usage, and it's expected that `reset_column_information` will be
called after the table is modified, I don't think it's a problem.
Still, test failures that were unrelated to the change are worrying, and
I need to dig into them further.
Finally, I spent a lot of time debugging issues with the mutex used in
`define_attribute_methods`. I think we can just remove that method
entirely, and define the attribute methods *manually* in the call to
`define_attribute`, which would simplify the code *tremendously*.
Ok. now to make this damn thing public, and work on moving it up to
Active Model.
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This is no longer required now that we are injecting a type caster
object into the Arel table, with the exception of uniqueness
validations. Since it calls `ConnectionAdapter#type_cast`, the value has
already been cast for the database. We don't want Arel to attempt to
cast it further, so we need to continue wrapping it in a quoted node.
This can potentially go away when this validator is refactored to make
better use of `where` or the predicate builder.
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We will always have the correct type for this query, so no casting is
needed. We inform Arel that we already have the right type by wrapping
it in an `Arel::Nodes::Quoted` (which we will no longer need to do in
Rails 5.1)
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This reverts commit 8fee923888192a658d8823b31e77ed0683dfd665.
Conflicts:
activerecord/lib/active_record/attribute_set/builder.rb
This solution sucks, and is hard to actually apply across the board.
Going to try other solutions
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We introduced a performance hit by adding an additional iteration
through a model's attributes on creation. We don't actually need the
values from `Result` to be a hash, we can separate the columns and
values and zip them up ourself during the iteration that we have to do.
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This patch uniformizes warning messages. I used the most common style
already present in the code base:
* Capitalize the first word.
* End the message with a full stop.
* "Rails 5" instead of "Rails 5.0".
* Backticks for method names and inline code.
Also, converted a few long strings into the new heredoc convention.
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Dont swallow errors when bad alias_method
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Move serialization dirty into serialization.rb
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The `subclass_from_attrs` method is called even if the column specified by
the `inheritance_column` setting doesn't exist. This prevents setting associations
via the attributes hash if the association name clashes with the value of the setting,
typically `:type`. This worked previously in Rails 3.2.
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These methods were only used for the `IdentityMap` which was removed.
They are no longer used internally and should be removed without replacement.
As they were not `:nodoc:`'ed it's better to deprecate them before removal.
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Fix ActiveRecord `subclass_from_attrs` when eager_load is false.
Conflicts:
activerecord/CHANGELOG.md
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It cannot find subclass because all classes are loaded automatically
when it needs.
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Calling a literal ActiveRecord::Base.new raises NoMethodError,
since it ends up calling Class.abstract_class? which does not exist.
Similarly, instantiating an actual abstract class hits the database,
when conventionally it should immediately throw NotImplementedError.
ActiveRecord::Base can't be made abstract without breaking many,
many things, so check for it separately.
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Inheritance#discriminate_class_for_record handle STI lookup duties.
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Allows you to do BaseClass.new(:type => "SubClass") as well as
parent.children.build(:type => "SubClass") or parent.build_child
to initialize an STI subclass. Ensures that the class name is a
valid class and that it is in the ancestors of the super class
that the association is expecting.
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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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This reverts commit 83846838252397b3781eed165ca301e05db39293.
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