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提交 3803fcce 编写于 作者: J Jon Leighton
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Remove :finder_sql, :counter_sql, :insert_sql, :delete_sql.

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activerecord/CHANGELOG.md
浏览文件 @ 3803fcce
## Rails 4.0.0 (unreleased) ##
* Removed `:finder_sql` and `:counter_sql` collection association options. Please
use scopes instead.
*Jon Leighton*
* Removed `:insert_sql` and `:delete_sql` `has_and_belongs_to_many`
association options. Please use `has_many :through` instead.
*Jon Leighton*
* The migration generator now creates a join table with (commented) indexes every time
the migration name contains the word `join_table`:
......
activerecord/lib/active_record/associations.rb
浏览文件 @ 3803fcce
......@@ -1104,15 +1104,6 @@ module ClassMethods
# a +belongs_to+, and the records which get deleted are the join records, rather than
# the associated records.
#
# [:finder_sql]
# Specify a complete SQL statement to fetch the association. This is a good way to go for complex
# associations that depend on multiple tables. May be supplied as a string or a proc where interpolation is
# required. Note: When this option is used, +find_in_collection+
# is _not_ added.
# [:counter_sql]
# Specify a complete SQL statement to fetch the size of the association. If <tt>:finder_sql</tt> is
# specified but not <tt>:counter_sql</tt>, <tt>:counter_sql</tt> will be generated by
# replacing <tt>SELECT ... FROM</tt> with <tt>SELECT COUNT(*) FROM</tt>.
# [:extend]
# Specify a named module for extending the proxy. See "Association extensions".
# [:include]
......@@ -1184,14 +1175,6 @@ module ClassMethods
# has_many :tags, :as => :taggable
# has_many :reports, :readonly => true
# has_many :subscribers, :through => :subscriptions, :source => :user
# has_many :subscribers, :class_name => "Person", :finder_sql => Proc.new {
# %Q{
# SELECT DISTINCT *
# FROM people p, post_subscriptions ps
# WHERE ps.post_id = #{id} AND ps.person_id = p.id
# ORDER BY p.first_name
# }
# }
def has_many(name, scope = nil, options = {}, &extension)
Builder::HasMany.build(self, name, scope, options, &extension)
end
......@@ -1555,18 +1538,6 @@ def belongs_to(name, scope = nil, options = {})
# such as <tt>last_name, first_name DESC</tt>
# [:uniq]
# If true, duplicate associated objects will be ignored by accessors and query methods.
# [:finder_sql]
# Overwrite the default generated SQL statement used to fetch the association with a manual statement
# [:counter_sql]
# Specify a complete SQL statement to fetch the size of the association. If <tt>:finder_sql</tt> is
# specified but not <tt>:counter_sql</tt>, <tt>:counter_sql</tt> will be generated by
# replacing <tt>SELECT ... FROM</tt> with <tt>SELECT COUNT(*) FROM</tt>.
# [:delete_sql]
# Overwrite the default generated SQL statement used to remove links between the associated
# classes with a manual statement.
# [:insert_sql]
# Overwrite the default generated SQL statement used to add links between the associated classes
# with a manual statement.
# [:extend]
# Anonymous module for extending the proxy, see "Association extensions".
# [:include]
......@@ -1603,8 +1574,6 @@ def belongs_to(name, scope = nil, options = {})
# has_and_belongs_to_many :nations, :class_name => "Country"
# has_and_belongs_to_many :categories, :join_table => "prods_cats"
# has_and_belongs_to_many :categories, :readonly => true
# has_and_belongs_to_many :active_projects, :join_table => 'developers_projects', :delete_sql =>
# proc { |record| "DELETE FROM developers_projects WHERE active=1 AND developer_id = #{id} AND project_id = #{record.id}" }
def has_and_belongs_to_many(name, scope = nil, options = {}, &extension)
Builder::HasAndBelongsToMany.build(self, name, scope, options, &extension)
end
......
activerecord/lib/active_record/associations/association.rb
浏览文件 @ 3803fcce
......@@ -140,14 +140,6 @@ def load_target
reset
end
def interpolate(sql, record = nil)
if sql.respond_to?(:to_proc)
owner.send(:instance_exec, record, &sql)
else
sql
end
end
# We can't dump @reflection since it contains the scope proc
def marshal_dump
reflection = @reflection
......
activerecord/lib/active_record/associations/association_scope.rb
浏览文件 @ 3803fcce
......@@ -5,7 +5,7 @@ class AssociationScope #:nodoc:
attr_reader :association, :alias_tracker
delegate :klass, :owner, :reflection, :interpolate, :to => :association
delegate :klass, :owner, :reflection, :to => :association
delegate :chain, :scope_chain, :options, :source_options, :active_record, :to => :reflection
def initialize(association)
......
activerecord/lib/active_record/associations/builder/collection_association.rb
浏览文件 @ 3803fcce
......@@ -3,7 +3,7 @@ class CollectionAssociation < Association #:nodoc:
CALLBACKS = [:before_add, :after_add, :before_remove, :after_remove]
def valid_options
super + [:table_name, :finder_sql, :counter_sql, :before_add, :after_add, :before_remove, :after_remove]
super + [:table_name, :before_add, :after_add, :before_remove, :after_remove]
end
attr_reader :block_extension, :extension_module
......
activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
浏览文件 @ 3803fcce
......@@ -5,7 +5,7 @@ def macro
end
def valid_options
super + [:join_table, :association_foreign_key, :delete_sql, :insert_sql]
super + [:join_table, :association_foreign_key]
end
def build
......
activerecord/lib/active_record/associations/collection_association.rb
浏览文件 @ 3803fcce
......@@ -44,7 +44,7 @@ def writer(records)
# Implements the ids reader method, e.g. foo.item_ids for Foo.has_many :items
def ids_reader
if loaded? || options[:finder_sql]
if loaded?
load_target.map do |record|
record.send(reflection.association_primary_key)
end
......@@ -79,11 +79,7 @@ def find(*args)
if block_given?
load_target.find(*args) { |*block_args| yield(*block_args) }
else
if options[:finder_sql]
find_by_scan(*args)
else
scoped.find(*args)
end
scoped.find(*args)
end
end
......@@ -170,35 +166,26 @@ def sum(*args)
end
end
# Count all records using SQL. If the +:counter_sql+ or +:finder_sql+ option is set for the
# association, it will be used for the query. Otherwise, construct options and pass them with
# Count all records using SQL. Construct options and pass them with
# scope to the target class's +count+.
def count(column_name = nil, count_options = {})
column_name, count_options = nil, column_name if column_name.is_a?(Hash)
if options[:counter_sql] || options[:finder_sql]
unless count_options.blank?
raise ArgumentError, "If finder_sql/counter_sql is used then options cannot be passed"
end
reflection.klass.count_by_sql(custom_counter_sql)
else
if association_scope.uniq_value
# This is needed because 'SELECT count(DISTINCT *)..' is not valid SQL.
column_name ||= reflection.klass.primary_key
count_options[:distinct] = true
end
if association_scope.uniq_value
# This is needed because 'SELECT count(DISTINCT *)..' is not valid SQL.
column_name ||= reflection.klass.primary_key
count_options[:distinct] = true
end
value = scoped.count(column_name, count_options)
value = scoped.count(column_name, count_options)
limit = options[:limit]
offset = options[:offset]
limit = options[:limit]
offset = options[:offset]
if limit || offset
[ [value - offset.to_i, 0].max, limit.to_i ].min
else
value
end
if limit || offset
[ [value - offset.to_i, 0].max, limit.to_i ].min
else
value
end
end
......@@ -323,7 +310,6 @@ def include?(record)
if record.new_record?
include_in_memory?(record)
else
load_target if options[:finder_sql]
loaded? ? target.include?(record) : scoped.exists?(record)
end
else
......@@ -358,31 +344,8 @@ def add_to_target(record)
private
def custom_counter_sql
if options[:counter_sql]
interpolate(options[:counter_sql])
else
# replace the SELECT clause with COUNT(SELECTS), preserving any hints within /* ... */
interpolate(options[:finder_sql]).sub(/SELECT\b(\/\*.*?\*\/ )?(.*)\bFROM\b/im) do
count_with = $2.to_s
count_with = '*' if count_with.blank? || count_with =~ /,/
"SELECT #{$1}COUNT(#{count_with}) FROM"
end
end
end
def custom_finder_sql
interpolate(options[:finder_sql])
end
def find_target
records =
if options[:finder_sql]
reflection.klass.find_by_sql(custom_finder_sql)
else
scoped.all
end
records = scoped.to_a
records.each { |record| set_inverse_instance(record) }
records
end
......@@ -521,7 +484,6 @@ def callbacks_for(callback_name)
# Otherwise, go to the database only if none of the following are true:
# * target already loaded
# * owner is new record
# * custom :finder_sql exists
# * target contains new or changed record(s)
# * the first arg is an integer (which indicates the number of records to be returned)
def fetch_first_or_last_using_find?(args)
......@@ -530,7 +492,6 @@ def fetch_first_or_last_using_find?(args)
else
!(loaded? ||
owner.new_record? ||
options[:finder_sql] ||
target.any? { |record| record.new_record? || record.changed? } ||
args.first.kind_of?(Integer))
end
......@@ -547,20 +508,6 @@ def include_in_memory?(record)
end
end
# If using a custom finder_sql, #find scans the entire collection.
def find_by_scan(*args)
expects_array = args.first.kind_of?(Array)
ids = args.flatten.compact.map{ |arg| arg.to_i }.uniq
if ids.size == 1
id = ids.first
record = load_target.detect { |r| id == r.id }
expects_array ? [ record ] : record
else
load_target.select { |r| ids.include?(r.id) }
end
end
# Fetches the first/last using SQL if possible, otherwise from the target array.
def first_or_last(type, *args)
args.shift if args.first.is_a?(Hash) && args.first.empty?
......
activerecord/lib/active_record/associations/has_and_belongs_to_many_association.rb
浏览文件 @ 3803fcce
......@@ -18,16 +18,12 @@ def insert_record(record, validate = true, raise = false)
end
end
if options[:insert_sql]
owner.connection.insert(interpolate(options[:insert_sql], record))
else
stmt = join_table.compile_insert(
join_table[reflection.foreign_key] => owner.id,
join_table[reflection.association_foreign_key] => record.id
)
stmt = join_table.compile_insert(
join_table[reflection.foreign_key] => owner.id,
join_table[reflection.association_foreign_key] => record.id
)
owner.connection.insert stmt
end
owner.connection.insert stmt
record
end
......@@ -39,22 +35,17 @@ def count_records
end
def delete_records(records, method)
if sql = options[:delete_sql]
records = load_target if records == :all
records.each { |record| owner.connection.delete(interpolate(sql, record)) }
else
relation = join_table
condition = relation[reflection.foreign_key].eq(owner.id)
unless records == :all
condition = condition.and(
relation[reflection.association_foreign_key]
.in(records.map { |x| x.id }.compact)
)
end
owner.connection.delete(relation.where(condition).compile_delete)
relation = join_table
condition = relation[reflection.foreign_key].eq(owner.id)
unless records == :all
condition = condition.and(
relation[reflection.association_foreign_key]
.in(records.map { |x| x.id }.compact)
)
end
owner.connection.delete(relation.where(condition).compile_delete)
end
def invertible_for?(record)
......
activerecord/lib/active_record/associations/has_many_association.rb
浏览文件 @ 3803fcce
......@@ -33,13 +33,7 @@ def insert_record(record, validate = true, raise = false)
# If the collection is empty the target is set to an empty array and
# the loaded flag is set to true as well.
def count_records
count = if has_cached_counter?
owner.send(:read_attribute, cached_counter_attribute_name)
elsif options[:counter_sql] || options[:finder_sql]
reflection.klass.count_by_sql(custom_counter_sql)
else
scoped.count
end
count = has_cached_counter? ? owner[cached_counter_attribute_name] : scoped.count
# If there's nothing in the database and @target has no new records
# we are certain the current target is an empty array. This is a
......
activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
浏览文件 @ 3803fcce
......@@ -65,16 +65,6 @@ class DeveloperWithSymbolsForKeys < ActiveRecord::Base
:foreign_key => "developer_id"
end
class DeveloperWithCounterSQL < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects,
:class_name => "DeveloperWithCounterSQL",
:join_table => "developers_projects",
:association_foreign_key => "project_id",
:foreign_key => "developer_id",
:counter_sql => proc { "SELECT COUNT(*) AS count_all FROM projects INNER JOIN developers_projects ON projects.id = developers_projects.project_id WHERE developers_projects.developer_id =#{id}" }
end
class HasAndBelongsToManyAssociationsTest < ActiveRecord::TestCase
fixtures :accounts, :companies, :categories, :posts, :categories_posts, :developers, :projects, :developers_projects,
:parrots, :pirates, :parrots_pirates, :treasures, :price_estimates, :tags, :taggings
......@@ -361,31 +351,6 @@ def test_deleting_array
assert_equal 0, david.projects(true).size
end
def test_deleting_with_sql
david = Developer.find(1)
active_record = Project.find(1)
active_record.developers.reload
assert_equal 3, active_record.developers_by_sql.size
active_record.developers_by_sql.delete(david)
assert_equal 2, active_record.developers_by_sql(true).size
end
def test_deleting_array_with_sql
active_record = Project.find(1)
active_record.developers.reload
assert_equal 3, active_record.developers_by_sql.size
active_record.developers_by_sql.delete(Developer.all)
assert_equal 0, active_record.developers_by_sql(true).size
end
def test_deleting_all_with_sql
project = Project.find(1)
project.developers_by_sql.delete_all
assert_equal 0, project.developers_by_sql.size
end
def test_deleting_all
david = Developer.find(1)
david.projects.reload
......@@ -534,25 +499,6 @@ def test_include_returns_false_for_non_matching_record_to_verify_scoping
assert ! project.developers.include?(developer)
end
def test_find_in_association_with_custom_finder_sql
assert_equal developers(:david), projects(:active_record).developers_with_finder_sql.find(developers(:david).id), "SQL find"
active_record = projects(:active_record)
active_record.developers_with_finder_sql.reload
assert_equal developers(:david), active_record.developers_with_finder_sql.find(developers(:david).id), "Ruby find"
end
def test_find_in_association_with_custom_finder_sql_and_multiple_interpolations
# interpolate once:
assert_equal [developers(:david), developers(:jamis), developers(:poor_jamis)], projects(:active_record).developers_with_finder_sql, "first interpolation"
# interpolate again, for a different project id
assert_equal [developers(:david)], projects(:action_controller).developers_with_finder_sql, "second interpolation"
end
def test_find_in_association_with_custom_finder_sql_and_string_id
assert_equal developers(:david), projects(:active_record).developers_with_finder_sql.find(developers(:david).id.to_s), "SQL find"
end
def test_find_with_merged_options
assert_equal 1, projects(:active_record).limited_developers.size
assert_equal 1, projects(:active_record).limited_developers.all.size
......@@ -788,21 +734,6 @@ def test_count
assert_equal 2, david.projects.count
end
def test_count_with_counter_sql
developer = DeveloperWithCounterSQL.create(:name => 'tekin')
developer.project_ids = [projects(:active_record).id]
developer.save
developer.reload
assert_equal 1, developer.projects.count
end
unless current_adapter?(:PostgreSQLAdapter)
def test_count_with_finder_sql
assert_equal 3, projects(:active_record).developers_with_finder_sql.count
assert_equal 3, projects(:active_record).developers_with_multiline_finder_sql.count
end
end
def test_association_proxy_transaction_method_starts_transaction_in_association_class
Post.expects(:transaction)
Category.first.posts.transaction do
......
activerecord/test/cases/associations/has_many_associations_test.rb
浏览文件 @ 3803fcce
......@@ -20,43 +20,6 @@
require 'models/bulb'
require 'models/engine'
class HasManyAssociationsTestForCountWithFinderSql < ActiveRecord::TestCase
class Invoice < ActiveRecord::Base
has_many :custom_line_items, :class_name => 'LineItem', :finder_sql => "SELECT line_items.* from line_items"
end
def test_should_fail
assert_raise(ArgumentError) do
Invoice.create.custom_line_items.count(:conditions => {:amount => 0})
end
end
end
class HasManyAssociationsTestForCountWithCountSql < ActiveRecord::TestCase
class Invoice < ActiveRecord::Base
has_many :custom_line_items, :class_name => 'LineItem', :counter_sql => "SELECT COUNT(*) line_items.* from line_items"
end
def test_should_fail
assert_raise(ArgumentError) do
Invoice.create.custom_line_items.count(:conditions => {:amount => 0})
end
end
end
class HasManyAssociationsTestForCountDistinctWithFinderSql < ActiveRecord::TestCase
class Invoice < ActiveRecord::Base
has_many :custom_line_items, :class_name => 'LineItem', :finder_sql => "SELECT DISTINCT line_items.amount from line_items"
end
def test_should_count_distinct_results
invoice = Invoice.new
invoice.custom_line_items << LineItem.new(:amount => 0)
invoice.custom_line_items << LineItem.new(:amount => 0)
invoice.save!
assert_equal 1, invoice.custom_line_items.count
end
end
class HasManyAssociationsTestForReorderWithJoinDependency < ActiveRecord::TestCase
fixtures :authors, :posts, :comments
......@@ -307,37 +270,6 @@ def test_finding_using_primary_key
assert_equal "Summit", Firm.scoped(:order => "id").first.clients_using_primary_key.first.name
end
def test_finding_using_sql
firm = Firm.scoped(:order => "id").first
first_client = firm.clients_using_sql.first
assert_not_nil first_client
assert_equal "Microsoft", first_client.name
assert_equal 1, firm.clients_using_sql.size
assert_equal 1, Firm.scoped(:order => "id").first.clients_using_sql.size
end
def test_finding_using_sql_take_into_account_only_uniq_ids
firm = Firm.scoped(:order => "id").first
client = firm.clients_using_sql.first
assert_equal client, firm.clients_using_sql.find(client.id, client.id)
assert_equal client, firm.clients_using_sql.find(client.id, client.id.to_s)
end
def test_counting_using_sql
assert_equal 1, Firm.scoped(:order => "id").first.clients_using_counter_sql.size
assert Firm.scoped(:order => "id").first.clients_using_counter_sql.any?
assert_equal 0, Firm.scoped(:order => "id").first.clients_using_zero_counter_sql.size
assert !Firm.scoped(:order => "id").first.clients_using_zero_counter_sql.any?
end
def test_counting_non_existant_items_using_sql
assert_equal 0, Firm.scoped(:order => "id").first.no_clients_using_counter_sql.size
end
def test_counting_using_finder_sql
assert_equal 2, Firm.find(4).clients_using_sql.count
end
def test_belongs_to_sanity
c = Client.new
assert_nil c.firm
......@@ -365,22 +297,6 @@ def test_find_ids
assert_raise(ActiveRecord::RecordNotFound) { firm.clients.find(2, 99) }
end
def test_find_string_ids_when_using_finder_sql
firm = Firm.scoped(:order => "id").first
client = firm.clients_using_finder_sql.find("2")
assert_kind_of Client, client
client_ary = firm.clients_using_finder_sql.find(["2"])
assert_kind_of Array, client_ary
assert_equal client, client_ary.first
client_ary = firm.clients_using_finder_sql.find("2", "3")
assert_kind_of Array, client_ary
assert_equal 2, client_ary.size
assert client_ary.include?(client)
end
def test_find_all
firm = Firm.scoped(:order => "id").first
assert_equal 2, firm.clients.scoped(:where => "#{QUOTED_TYPE} = 'Client'").all.length
......@@ -1208,13 +1124,6 @@ def test_get_ids_ignores_include_option
assert_equal [readers(:michael_welcome).id], posts(:welcome).readers_with_person_ids
end
def test_get_ids_for_unloaded_finder_sql_associations_loads_them
company = companies(:first_firm)
assert !company.clients_using_sql.loaded?
assert_equal [companies(:second_client).id], company.clients_using_sql_ids
assert company.clients_using_sql.loaded?
end
def test_get_ids_for_ordered_association
assert_equal [companies(:second_client).id, companies(:first_client).id], companies(:first_firm).clients_ordered_by_name_ids
end
......@@ -1275,17 +1184,6 @@ def test_include_checks_if_record_exists_if_target_not_loaded
assert ! firm.clients.loaded?
end
def test_include_loads_collection_if_target_uses_finder_sql
firm = companies(:first_firm)
client = firm.clients_using_sql.first
firm.reload
assert ! firm.clients_using_sql.loaded?
assert firm.clients_using_sql.include?(client)
assert firm.clients_using_sql.loaded?
end
def test_include_returns_false_for_non_matching_record_to_verify_scoping
firm = companies(:first_firm)
client = Client.create!(:name => 'Not Associated')
......
activerecord/test/cases/reflection_test.rb
浏览文件 @ 3803fcce
......@@ -165,8 +165,8 @@ def test_association_reflection_in_modules
def test_reflection_of_all_associations
# FIXME these assertions bust a lot
assert_equal 39, Firm.reflect_on_all_associations.size
assert_equal 29, Firm.reflect_on_all_associations(:has_many).size
assert_equal 34, Firm.reflect_on_all_associations.size
assert_equal 24, Firm.reflect_on_all_associations(:has_many).size
assert_equal 10, Firm.reflect_on_all_associations(:has_one).size
assert_equal 0, Firm.reflect_on_all_associations(:belongs_to).size
end
......
activerecord/test/models/company.rb
浏览文件 @ 3803fcce
......@@ -36,9 +36,7 @@ class Client < ::Company
end
class Firm < Company
has_many :clients, -> { order "id" }, :dependent => :destroy, :counter_sql =>
"SELECT COUNT(*) FROM companies WHERE firm_id = 1 " +
"AND (#{QUOTED_TYPE} = 'Client' OR #{QUOTED_TYPE} = 'SpecialClient' OR #{QUOTED_TYPE} = 'VerySpecialClient' )",
has_many :clients, -> { order "id" }, :dependent => :destroy,
:before_remove => :log_before_remove,
:after_remove => :log_after_remove
has_many :unsorted_clients, :class_name => "Client"
......@@ -53,17 +51,6 @@ class Firm < Company
has_many :clients_with_interpolated_conditions, ->(firm) { where "rating > #{firm.rating}" }, :class_name => "Client"
has_many :clients_like_ms, -> { where("name = 'Microsoft'").order("id") }, :class_name => "Client"
has_many :clients_like_ms_with_hash_conditions, -> { where(:name => 'Microsoft').order("id") }, :class_name => "Client"
has_many :clients_using_sql, :class_name => "Client", :finder_sql => proc { "SELECT * FROM companies WHERE client_of = #{id}" }
has_many :clients_using_counter_sql, :class_name => "Client",
:finder_sql => proc { "SELECT * FROM companies WHERE client_of = #{id} " },
:counter_sql => proc { "SELECT COUNT(*) FROM companies WHERE client_of = #{id}" }
has_many :clients_using_zero_counter_sql, :class_name => "Client",
:finder_sql => proc { "SELECT * FROM companies WHERE client_of = #{id}" },
:counter_sql => proc { "SELECT 0 FROM companies WHERE client_of = #{id}" }
has_many :no_clients_using_counter_sql, :class_name => "Client",
:finder_sql => 'SELECT * FROM companies WHERE client_of = 1000',
:counter_sql => 'SELECT COUNT(*) FROM companies WHERE client_of = 1000'
has_many :clients_using_finder_sql, :class_name => "Client", :finder_sql => 'SELECT * FROM companies WHERE 1=1'
has_many :plain_clients, :class_name => 'Client'
has_many :readonly_clients, -> { readonly }, :class_name => 'Client'
has_many :clients_using_primary_key, :class_name => 'Client',
......
activerecord/test/models/company_in_module.rb
浏览文件 @ 3803fcce
......@@ -11,7 +11,6 @@ class Firm < Company
has_many :clients_sorted_desc, -> { order("id DESC") }, :class_name => "Client"
has_many :clients_of_firm, -> { order "id" }, :foreign_key => "client_of", :class_name => "Client"
has_many :clients_like_ms, -> { where("name = 'Microsoft'").order("id") }, :class_name => "Client"
has_many :clients_using_sql, :class_name => "Client", :finder_sql => 'SELECT * FROM companies WHERE client_of = #{id}'
has_one :account, :class_name => 'MyApplication::Billing::Account', :dependent => :destroy
end
......
activerecord/test/models/project.rb
浏览文件 @ 3803fcce
......@@ -7,15 +7,6 @@ class Project < ActiveRecord::Base
has_and_belongs_to_many :developers_named_david, -> { where("name = 'David'").uniq }, :class_name => "Developer"
has_and_belongs_to_many :developers_named_david_with_hash_conditions, -> { where(:name => 'David').uniq }, :class_name => "Developer"
has_and_belongs_to_many :salaried_developers, -> { where "salary > 0" }, :class_name => "Developer"
has_and_belongs_to_many :developers_with_finder_sql, :class_name => "Developer", :finder_sql => proc { "SELECT t.*, j.* FROM developers_projects j, developers t WHERE t.id = j.developer_id AND j.project_id = #{id} ORDER BY t.id" }
has_and_belongs_to_many :developers_with_multiline_finder_sql, :class_name => "Developer", :finder_sql => proc {
"SELECT
t.*, j.*
FROM
developers_projects j,
developers t WHERE t.id = j.developer_id AND j.project_id = #{id} ORDER BY t.id"
}
has_and_belongs_to_many :developers_by_sql, :class_name => "Developer", :delete_sql => proc { |record| "DELETE FROM developers_projects WHERE project_id = #{id} AND developer_id = #{record.id}" }
has_and_belongs_to_many :developers_with_callbacks, :class_name => "Developer", :before_add => Proc.new {|o, r| o.developers_log << "before_adding#{r.id || '<new>'}"},
:after_add => Proc.new {|o, r| o.developers_log << "after_adding#{r.id || '<new>'}"},
:before_remove => Proc.new {|o, r| o.developers_log << "before_removing#{r.id}"},
......
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