diff options
Diffstat (limited to 'activerecord/lib/active_record/querying.rb')
| -rw-r--r-- | activerecord/lib/active_record/querying.rb | 47 |
1 files changed, 27 insertions, 20 deletions
diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index c84f3d0fbb..08cfc3fe5f 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -2,31 +2,36 @@ module ActiveRecord module Querying - delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, :none?, :one?, to: :all - delegate :second, :second!, :third, :third!, :fourth, :fourth!, :fifth, :fifth!, :forty_two, :forty_two!, :third_to_last, :third_to_last!, :second_to_last, :second_to_last!, to: :all - delegate :first_or_create, :first_or_create!, :first_or_initialize, to: :all - delegate :find_or_create_by, :find_or_create_by!, :create_or_find_by, :create_or_find_by!, :find_or_initialize_by, to: :all - delegate :find_by, :find_by!, to: :all - delegate :destroy_all, :delete_all, :update_all, to: :all - delegate :find_each, :find_in_batches, :in_batches, to: :all - delegate :select, :group, :order, :except, :reorder, :limit, :offset, :joins, :left_joins, :left_outer_joins, :or, - :where, :rewhere, :preload, :eager_load, :includes, :from, :lock, :readonly, :extending, - :having, :create_with, :distinct, :references, :none, :unscope, :merge, to: :all - delegate :count, :average, :minimum, :maximum, :sum, :calculate, to: :all - delegate :pluck, :pick, :ids, to: :all + QUERYING_METHODS = [ + :find, :find_by, :find_by!, :take, :take!, :first, :first!, :last, :last!, + :second, :second!, :third, :third!, :fourth, :fourth!, :fifth, :fifth!, + :forty_two, :forty_two!, :third_to_last, :third_to_last!, :second_to_last, :second_to_last!, + :exists?, :any?, :many?, :none?, :one?, + :first_or_create, :first_or_create!, :first_or_initialize, + :find_or_create_by, :find_or_create_by!, :find_or_initialize_by, + :create_or_find_by, :create_or_find_by!, + :destroy_all, :delete_all, :update_all, :touch_all, :destroy_by, :delete_by, + :find_each, :find_in_batches, :in_batches, + :select, :reselect, :order, :reorder, :group, :limit, :offset, :joins, :left_joins, :left_outer_joins, + :where, :rewhere, :preload, :extract_associated, :eager_load, :includes, :from, :lock, :readonly, :extending, :or, + :having, :create_with, :distinct, :references, :none, :unscope, :optimizer_hints, :merge, :except, :only, + :count, :average, :minimum, :maximum, :sum, :calculate, :annotate, + :pluck, :pick, :ids + ].freeze # :nodoc: + delegate(*QUERYING_METHODS, to: :all) # Executes a custom SQL query against your database and returns all the results. The results will - # be returned as an array with columns requested encapsulated as attributes of the model you call - # this method from. If you call <tt>Product.find_by_sql</tt> then the results will be returned in + # be returned as an array, with the requested columns encapsulated as attributes of the model you call + # this method from. For example, if you call <tt>Product.find_by_sql</tt>, then the results will be returned in # a +Product+ object with the attributes you specified in the SQL query. # - # If you call a complicated SQL query which spans multiple tables the columns specified by the + # If you call a complicated SQL query which spans multiple tables, the columns specified by the # SELECT will be attributes of the model, whether or not they are columns of the corresponding # table. # - # The +sql+ parameter is a full SQL query as a string. It will be called as is, there will be - # no database agnostic conversions performed. This should be a last resort because using, for example, - # MySQL specific terms will lock you to using that particular database engine or require you to + # The +sql+ parameter is a full SQL query as a string. It will be called as is; there will be + # no database agnostic conversions performed. This should be a last resort because using + # database-specific terms will lock you into using that particular database engine, or require you to # change your call if you switch engines. # # # A simple SQL query spanning multiple tables @@ -40,7 +45,7 @@ module ActiveRecord def find_by_sql(sql, binds = [], preparable: nil, &block) result_set = connection.select_all(sanitize_sql(sql), "#{name} Load", binds, preparable: preparable) column_types = result_set.column_types.dup - columns_hash.each_key { |k| column_types.delete k } + attribute_types.each_key { |k| column_types.delete k } message_bus = ActiveSupport::Notifications.instrumenter payload = { @@ -60,7 +65,9 @@ module ActiveRecord # Returns the result of an SQL statement that should only include a COUNT(*) in the SELECT part. # The use of this method should be restricted to complicated SQL queries that can't be executed - # using the ActiveRecord::Calculations class methods. Look into those before using this. + # using the ActiveRecord::Calculations class methods. Look into those before using this method, + # as it could lock you into a specific database engine or require a code change to switch + # database engines. # # Product.count_by_sql "SELECT COUNT(*) FROM sales s, customers c WHERE s.customer_id = c.id" # # => 12 |