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# File 'lib/store_base_sti_class_for_4_0.rb', line 201
def add_constraints(scope)
tables = construct_tables
chain.each_with_index do |reflection, i|
table, foreign_table = tables.shift, tables.first
if reflection.source_macro == :has_and_belongs_to_many
join_table = tables.shift
scope = scope.joins(join(
join_table,
table[reflection.association_primary_key].
eq(join_table[reflection.association_foreign_key])
))
table, foreign_table = join_table, tables.first
end
if reflection.source_macro == :belongs_to
if reflection.options[:polymorphic]
key = reflection.association_primary_key(self.klass)
else
key = reflection.association_primary_key
end
foreign_key = reflection.foreign_key
else
key = reflection.foreign_key
foreign_key = reflection.active_record_primary_key
end
if reflection == chain.last
bind_val = bind scope, table.table_name, key.to_s, owner[foreign_key]
scope = scope.where(table[key].eq(bind_val))
if reflection.type
unless ActiveRecord::Base.store_base_sti_class
value = owner.class.name
else
value = owner.class.base_class.name
end
bind_val = bind scope, table.table_name, reflection.type.to_s, value
scope = scope.where(table[reflection.type].eq(bind_val))
end
else
constraint = table[key].eq(foreign_table[foreign_key])
if reflection.type
if ActiveRecord::Base.store_base_sti_class
type = chain[i + 1].klass.base_class.name
constraint = constraint.and(table[reflection.type].eq(type))
else
klass = chain[i + 1].klass
constraint = constraint.and(table[reflection.type].in(([klass] + klass.descendants).map(&:name)))
end
end
scope = scope.joins(join(foreign_table, constraint))
end
is_first_chain = i == 0
klass = is_first_chain ? self.klass : reflection.klass
scope_chain[i].each do |scope_chain_item|
item = eval_scope(klass, scope_chain_item)
if scope_chain_item == self.reflection.scope
scope.merge! item.except(:where, :includes)
end
if is_first_chain
scope.includes! item.includes_values
end
scope.where_values += item.where_values
scope.order_values |= item.order_values
end
end
scope
end
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