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COUNT(*) queries can be slow in PostgreSQL, #exists? avoids this by
selecting a single record.
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Conflicts:
activemodel/lib/active_model/secure_password.rb
activerecord/lib/active_record/associations/collection_proxy.rb
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This reverts commit 3fb0100ef893b8cf229e82ce264b426e0c961eb1.
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This reverts commit c34c1916d1d6cd6ba219aa39eb97fa2e77c4c61f.
Reason: composed_of was added from now to discuss better
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It was previously removed from the code, so we shouldn't mention
it in the docs
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A Boolean field will accept true or false as defaults instead of 0 / 1.
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Closes #6600
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Some are loaded from Base which is loaded when a model inherits from it
and some others are used in rake tasks
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On reflection, it seems like a bit of a weird method to have on
ActiveRecord::Base, and it shouldn't be needed most of the time anyway.
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This was requested by DHH to allow creating of one's own custom
association macros.
For example:
module Commentable
def has_many_comments(extra)
has_many :comments, -> { where(:foo).merge(extra) }
end
end
class Post < ActiveRecord::Base
extend Commentable
has_many_comments -> { where(:bar) }
end
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This is a private place to put those AS features that are used
by every component. Nowadays we cherry-pick individual files
wherever they are used, but that it is not worth the effort
for stuff that is going to be loaded for sure sooner or later,
like blank?, autoload, concern, etc.
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zero and the new value is not a string.
Before this commit this was the behavior
r = Review.find_by_issue(0)
r.issue
=> 0
r.changes
=> {}
r.issue = 0
=> 0
r.changed?
=> true
r.changes
=> {"issue"=>[0,0]}
Fixes #7237
Conflicts:
activerecord/CHANGELOG.md
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This can be used to get a Relation from an association.
Previously we had a #scoped method, but we're deprecating that for
AR::Base, so it doesn't make sense to have it here.
This was requested by DHH, to facilitate code like this:
Project.scope.order('created_at DESC').page(current_page).tagged_with(@tag).limit(5).scoping do
@topics = @project.topics.scope
@todolists = @project.todolists.scope
@attachments = @project.attachments.scope
@documents = @project.documents.scope
end
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This makes it easier to see what the documentation refers to.
It also means that we are not doing unnecessary work for delegations
that have no args / splats / block / etc.
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This doesn't change the exernal behavior, but it moves some code around
to where I think it properly belongs.
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This method explicitly loads the records and then returns `self`.
Rather than deciding between "do I want an array or a relation?",
most people are actually asking themselves "do I want to eager load
or lazy load?" Therefore, this method provides a way to explicitly
eager-load without having to switch from a `Relation` to an array.
Example:
@posts = Post.where(published: true).load
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This reverts commit 3803fcce26b837c0117f7d278b83c366dc4ed370.
Conflicts:
activerecord/CHANGELOG.md
It will be deprecated only in 4.0, and removed properly in 4.1.
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e35c67ae0f920011a2440210041e96659a8de985
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The use_schema_cache_dump configuration moved to ActiveRecord.
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Move the logic for validation check to the same method, and cache
dependent option in a variable to reuse inside the dependency
configuration methods instead of relying on the options hash.
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User.order("name asc").order("created_at desc")
# SELECT * FROM users ORDER BY created_at desc, name asc
This also affects order defined in `default_scope` or any kind of associations.
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update_column was suggested as replacement of update_attribute at the
last release of 3-2-stable, so deprecating it now will confuse the
users.
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rimidl/fix-incorrect-require-mysql-in-mysql_rake_test
Fix incorrect usage `require mysql` in the activerecord/.../mysql_rake_test
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activerecord/test/.../mysql_rake_test.rb
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Documentation Fix: Pointing the case when no dependent option is given to a association method
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See the comment in the file activerecord/lib/active_record.rb
added by this patch for the rationale.
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Refactor to reset_table_name
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This require makes the dependency even more clear.
In particular we are eager loading the session
store but that does not work if AR is used
outside Rails, this patch is preliminary work
in fixing #7160.
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