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It doesn't serve much purpose now that ActiveRecord::Base.all returns a
Relation.
The code is moved to active_record_deprecated_finders.
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Don't use this:
scope :red, where(color: 'red')
default_scope where(color: 'red')
Use this:
scope :red, -> { where(color: 'red') }
default_scope { where(color: 'red') }
The former has numerous issues. It is a common newbie gotcha to do
the following:
scope :recent, where(published_at: Time.now - 2.weeks)
Or a more subtle variant:
scope :recent, -> { where(published_at: Time.now - 2.weeks) }
scope :recent_red, recent.where(color: 'red')
Eager scopes are also very complex to implement within Active
Record, and there are still bugs. For example, the following does
not do what you expect:
scope :remove_conditions, except(:where)
where(...).remove_conditions # => still has conditions
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before_initialize callback of the record runs. Fixes #1842.
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The build_association method was added as an API for plugins
to hook into in 1398db0. This commit restores this API and the
ability to override class.new to return a subclass based on
a virtual attribute in the attributes hash.
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attributes when copying, rather than using the assignment method
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be assigned without mass-assignment protection when a record is built on the association.
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macro multiple times that will give deprecation warnings, and in 3.2 we will simply overwrite the default scope when you call the macro multiple times.
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favour of defining a 'default_scope' class method in the model. See the CHANGELOG for more details.
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this can affect validations/callbacks/etc inside the record itself [#6252 state:resolved]
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child should be respected.
author.posts.create should take into account default_scope
defined on post.
[#3939: state:resolved]
Signed-off-by: José Valim <jose.valim@gmail.com>
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