| Commit message (Collapse) | Author | Age | Files | Lines |
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This object being a black box, it knows the details of how to merge
itself with another where clause. This removes all references to where
values or bind values in `Relation::Merger`
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The way that bind values are currently stored on Relation is a mess.
They can come from `having`, `where`, or `join`. I'm almost certain that
`having` is actually broken, and calling `where` followed by `having`
followed by `where` will completely scramble the binds.
Joins don't actually add the bind parameters to the relation itself, but
instead add it onto an accessor on the arel AST which is undocumented,
and unused in Arel itself. This means that the bind values must always
be accessed as `relation.arel.bind_values + relation.bind_values`.
Anything that doesn't is likely broken (and tons of bugs have come up
for exactly that reason)
The result is that everything dealing with `Relation` instances has to
know far too much about the internals. The binds are split, combined,
and re-stored in non-obvious ways that makes it difficult to change
anything about the internal representation of `bind_values`, and is
extremely prone to bugs.
So the goal is to move a lot of logic off of `Relation`, and into
separate objects. This is not the same as what is currently done with
`JoinDependency`, as `Relation` knows far too much about its internals,
and vice versa. Instead these objects need to be black boxes that can
have their implementations swapped easily.
The end result will be two classes, `WhereClause` and `JoinClause`
(`having` will just re-use `WhereClause`), and there will be a single
method to access the bind values of a `Relation` which will be
implemented as
```
join_clause.binds + where_clause.binds + having_clause.binds
```
This is the first step towards that refactoring, with the internal
representation of where changed, and an intermediate representation of
`where_values` and `bind_values` to let the refactoring take small
steps. These will be removed shortly.
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pretty_print will use #inspect if a subclass redefines it
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Extracted attributes assingment from ActiveRecord to ActiveModel
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`ActiveModel::AttributesAssignment`
Allows to use it for any object as an includable module.
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Given that this was originally added to normalize an error that would
have otherwise come from the database (inconsistently), it's more
natural for us to raise in `type_cast_for_database`, rather than
`type_cast_from_user`. This way, things like numericality validators can
handle it instead if the user chooses to do so. It also fixes an issue
where assigning an out of range value would make it impossible to assign
a new value later.
This fixes several vague issues, none of which were ever directly
reported, so I have no issue number to give. Places it was mentioned
which I can remember:
- https://github.com/thoughtbot/shoulda-matchers/blob/9ba21381d7caf045053a81f32df7de2f49687820/lib/shoulda/matchers/active_model/allow_value_matcher.rb#L261-L263
- https://github.com/rails/rails/issues/18653#issuecomment-71197026
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Fixes #18580.
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Fixes #18632
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Keeping with our behavior elsewhere in the system, invalid input is
assumed to be `nil`.
Fixes #18629.
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`drop_table`
since 'drop table if exists' statement does not always work with some databases such as Oracle.
also Oracle drop table statement will not drop sequence objects.
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This method can be used to see all of the fields on a model which have
been read. This can be useful during development mode to quickly find
out which fields need to be selected. For performance critical pages, if
you are not using all of the fields of a database, an easy performance
win is only selecting the fields which you need. By calling this method
at the end of a controller action, it's easy to determine which fields
need to be selected.
While writing this, I also noticed a place for an easy performance win
internally which I had been wanting to introduce. You cannot mutate a
field which you have not read. Therefore, we can skip the calculation of
in place changes if we have never read from the field. This can
significantly speed up methods like `#changed?` if any of the fields
have an expensive mutable type (like `serialize`)
```
Calculating -------------------------------------
#changed? with serialized column (before)
391.000 i/100ms
#changed? with serialized column (after)
1.514k i/100ms
-------------------------------------------------
#changed? with serialized column (before)
4.243k (± 3.7%) i/s - 21.505k
#changed? with serialized column (after)
16.789k (± 3.2%) i/s - 84.784k
```
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Support after_commit callbacks in transactional fixtures
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after_commit callbacks run after committing a transaction whose parent
is not `joinable?`: un-nested transactions, transactions within test
cases, and transactions in `console --sandbox`.
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Add an `:if_exists` option to `drop_table`
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If set to `if_exists: true`, it generates a statement like:
DROP TABLE IF EXISTS posts
This syntax is supported in the popular SQL servers, that is (at least)
SQLite, PostgreSQL, MySQL, Oracle and MS SQL Sever.
Closes #16366.
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With the old implementation, the bind values were created, and then we
search the attributes for `Relation` objects, and merge them. This
completely ignores the order that the actual `where` clause will use. If
all non-relation where parameters are before the relations, it will
work. However, if we query on both a relation and a value, with the
value coming second, it breaks. The order of the hash should not affect
the final query (especially since hashes being ordered is an
implementation detail)
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Looking through the blame, this logic used to be when we actually
created the bind tuple. My guess is that `nil` couldn't be handled there
at that time. It can, now.
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Remove unused accessor
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Run SQL only if attribute changed for update_attribute method
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- This is based on https://github.com/rails/rails/issues/18400 but
tackling same issue with update_attribute method instead of update method.
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`.` is regexp meta character. It should be escape for `assert_match`
correctly.
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When an attribute is assigned, we determine if it was already marked as
changed so we can determine if we need to clear the changes, or mark it
as changed. Since this only affects the `attributes_changed_by_setter`
hash, in-place changes are irrelevant to this process. Since calculating
in-place changes can be expensive, we can just skip it here.
I also added a test for the only edge case I could think of that would
be affected by this change.
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#assert was used when it should be assert_equal.
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The types that are affected by `time_zone_aware_attributes` (which is on
by default) have been made configurable, in case this is a breaking
change for existing applications.
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While we don't want to change the form input when validations fail,
blindly using `_before_type_cast` will cause the input to display the
wrong data for any type which does additional work on database values.
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This behavior exists only to support fixtures, so we should handle it
there. Leaving it in `#quote` can cause very subtle bugs to slip
through, by things appearing to work when they should be blowing up
loudly, such as #18385.
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I'm planning on deprecating the column argument to mirror the
deprecation in [arel].
[arel]: https://github.com/rails/arel/commit/6160bfbda1d1781c3b08a33ec4955f170e95be11
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There's very little value in logging "<NULL binary data>" instead of
just "nil". I'd like to remove the column from the equation entirely,
and this case is preventing us from doing so.
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This sets a precident for how we handle `attribute` calls, which aren't
backed by a database column. We should not take this as a conscious
decision on how to handle them, and this can change when we make
`attribute` public if we have better ideas in the future.
As the composed attributes API gets fleshed out, I expect the
`persistable_attributes` method to change to
`@attributes.select(&:persistable).keys`, or some more performant
variant there-of. This can probably go away completely once we fully
move dirty checking into the attribute objects once it gets moved up to
Active Model.
Fixes #18407
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Update Secure Token Doc [ci skip]
remove require securerandom, core_ext/securerandom already do that ref 7e006057
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This is cropping up all over the place. After a brief dive, I'm really
not sure why we have `arel.bind_values` at all. A cursory grep didn't
reveal where they're actually being assigned (it's definitely in AR, not
in Arel). I'd like to dig further into it, as I'm fairly certain we
don't actually need it, we just need a way for the predicate builder to
communicate merged binds upstream.
Fixes #18414
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The reason this bug occured is that we never actually check to see if
this column has changed from it's default, since it was never assigned
and is not mutable.
It appears I was wrong in b301c40224c6d15b539dbcc7485adb44d810f88c, with
my statement of "there is no longer a case where a given value would
differ from the default, but would not already be marked as changed."
However, I chose not to revert the deletion of
`initialize_internals_callback` from that commit, as I think a solution
closer to where the problem lies is less likely to get erroneously
removed. I'm not super happy with this solution, but it mirrors what is
being done in `_update_record`, and a fix for one should work for the
other.
I toyed with the idea of changing the definition of `changed?` on the
type to `changed_in_place?`. If we type cast the raw value, it'll break
a test about updating not modifying the lock column if nothing else was
changed. We could have the definition check if `raw_old_value` is `nil`,
but this feels fragile and less intention revealing. It would, however,
have the benefit of cleaning up old data that incorrectly persisted as
`nil`.
Fixes #18422
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Fix potenital infinite recursion in changed_for_autosave?
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When associations checked for autosave have a cycle, and
none of them is dirty, then changed_for_autosave? will be an
infinite loop. We now remember if we're in the check and
will short circuit the recursion.
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Previosly count and other AR calculations would convert
column_name_for_operation to sql on a default Arel::Table.engine
(AR::Base) connection. That could lead to trouble if current
model has a connection to a different adapter or Base connection
is inaccessible.
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- Fixtures with non-string labels such as integers should be accessed
using integer label as key. For eg. pirates(1) or pirates(42).
- But this results in NotFound error because the label is converted into string before
looking up into the fixtures hash.
- After this commit, the label is converted into string only if its a
symbol.
- This issue was fount out while adding a test case for
https://github.com/rails/rails/commit/7b910917.
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Propagate bind_values from join in subquery
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Fix rollback of primarykey-less tables
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