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Fixed that loading including associations returns all results if Load IDs For Limited Eager Loading returns none (closes #4528) [Rick]

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Added descriptive error messages for invalid has_many :through associations: going through :has_one or :has_and_belongs_to_many [Rick]
Added support for going through a polymorphic has_many association: (closes #4401) [Rick]


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Fixed that records returned from has_and_belongs_to_many associations with additional attributes should be marked as read only (fixes #4512) [DHH] DEPRECATED: Using additional attributes on has_and_belongs_to_many associations. Instead upgrade your association to be a real join model [DHH]

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Fixed eager loading so that an aliased table cannot clash with a has_and_belongs_to_many join table [Rick]

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Remove overrated warning from adapter_test




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Change has_many :through to use the :source option to specify the source association.  :class_name is now ignored. [Rick Olson]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4022 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

STI associations are now aliased to the table name for backwards compatibility.  Added docs for table aliasing [Rick Olson]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4015 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Don't classify the has_one class when eager loading, it is already singular. Add tests. (closes #4117) [jonathan@bluewire.net.nz]

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Allow has_many :through associations to find the source association by setting a custom class (closes #4307) [jonathan@bluewire.net.nz]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3973 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Eager Loading support added for has_many :through => :has_many associations (see below).  [Rick Olson]

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Raise error when trying to select many polymorphic objects with has_many :through or :include (closes #4226) [josh@hasmanythrough.com]

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Fixed has_many :through to include :conditions set on the :through association. closes #4020 [jonathan@bluewire.net.nz]

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Fixed that eager loading from belongs_to would cause the association to be double-singularized (closes #4117) [jonathan@bluewire.net.nz]

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Rework table aliasing to account for truncated table aliases.  Add smarter table aliasing when doing eager loading of STI associations. This allows you to use the association name in the order/where clause. [Jonathan Viney / Rick Olson] closes #4108

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Alias the has_and_belongs_to_many join table on eager includes. closes #4106 [jeremyevans0@gmail.com]

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Change LEFT OUTER JOIN authors AS authors to LEFT OUTER JOIN authors authors so associations will work for Oracle again (closes #4231) [schoenm@earthlink.net]

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Add documentation for :dependent on associations. [robby@planetargon.com] Closes #4151


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Fix quoting of inheritance column for STI eager loading #4098 [Jonathan Viney <jonathan@bluewire.net.nz>]

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slight change to eager associations table aliasing: use class_reflection, like 'post_comments' or 'tree_children'

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Fixed eager loading problems with single-table inheritance [Rick Olson] Added smarter table aliasing for eager associations for multiple self joins [Rick Olson] (closes #3580)

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Added cascading eager loading that allows for queries like Author.find(:all, :include=> { :posts=> :comments }), which will fetch all authors, their posts, and the comments belonging to those posts in a single query (using LEFT OUTER JOIN) #3913 [anna@wota.jp]

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