diff options
Diffstat (limited to 'activerecord/lib/active_record/relation/query_methods.rb')
| -rw-r--r-- | activerecord/lib/active_record/relation/query_methods.rb | 56 |
1 files changed, 35 insertions, 21 deletions
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index 529ddb5e31..5e5aca0396 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -7,34 +7,36 @@ module ActiveRecord Relation::MULTI_VALUE_METHODS.each do |name| class_eval <<-CODE, __FILE__, __LINE__ + 1 - def #{name}_values # def select_values - @values[:#{name}] || [] # @values[:select] || [] - end # end - # - def #{name}_values=(values) # def select_values=(values) - @values[:#{name}] = values # @values[:select] = values - end # end + def #{name}_values # def select_values + @values[:#{name}] || [] # @values[:select] || [] + end # end + # + def #{name}_values=(values) # def select_values=(values) + raise ImmutableRelation if @loaded # raise ImmutableRelation if @loaded + @values[:#{name}] = values # @values[:select] = values + end # end CODE end (Relation::SINGLE_VALUE_METHODS - [:create_with]).each do |name| class_eval <<-CODE, __FILE__, __LINE__ + 1 - def #{name}_value # def readonly_value - @values[:#{name}] # @values[:readonly] - end # end - # - def #{name}_value=(value) # def readonly_value=(value) - @values[:#{name}] = value # @values[:readonly] = value - end # end + def #{name}_value # def readonly_value + @values[:#{name}] # @values[:readonly] + end # end CODE end - def create_with_value - @values[:create_with] || {} + Relation::SINGLE_VALUE_METHODS.each do |name| + class_eval <<-CODE, __FILE__, __LINE__ + 1 + def #{name}_value=(value) # def readonly_value=(value) + raise ImmutableRelation if @loaded # raise ImmutableRelation if @loaded + @values[:#{name}] = value # @values[:readonly] = value + end # end + CODE end - def create_with_value=(value) - @values[:create_with] = value + def create_with_value + @values[:create_with] || {} end alias extensions extending_values @@ -71,8 +73,6 @@ module ActiveRecord # Used to indicate that an association is referenced by an SQL string, and should # therefore be JOINed in any query rather than loaded separately. # - # For example: - # # User.includes(:posts).where("posts.name = 'foo'") # # => Doesn't JOIN the posts table, resulting in an error. # @@ -163,7 +163,6 @@ module ActiveRecord # User.order('email DESC').reorder('id ASC').order('name ASC') # # generates a query with 'ORDER BY id ASC, name ASC'. - # def reorder(*args) args.blank? ? self : spawn.reorder!(*args) end @@ -308,6 +307,11 @@ module ActiveRecord self end + # Specifies a limit for the number of records to retrieve. + # + # User.limit(10) # generated SQL has 'LIMIT 10' + # + # User.limit(10).limit(20) # generated SQL has 'LIMIT 20' def limit(value) spawn.limit!(value) end @@ -317,6 +321,13 @@ module ActiveRecord self end + # Specifies the number of rows to skip before returning rows. + # + # User.offset(10) # generated SQL has "OFFSET 10" + # + # Should be used with order. + # + # User.offset(10).order("name ASC") def offset(value) spawn.offset!(value) end @@ -486,6 +497,9 @@ module ActiveRecord self end + # Reverse the existing order clause on the relation. + # + # User.order('name ASC').reverse_order # generated SQL has 'ORDER BY name DESC' def reverse_order spawn.reverse_order! end |