Module: CompositePrimaryKeys::ActiveRecord::FinderMethods
- Included in:
- CompositeRelation
- Defined in:
- lib/composite_primary_keys/relation/finder_methods.rb
Instance Method Summary collapse
- #apply_join_dependency(join_dependency = construct_join_dependency) ⇒ Object
- #construct_relation_for_exists(conditions) ⇒ Object
- #find_one(id) ⇒ Object
- #find_some(ids) ⇒ Object
- #find_some_ordered(ids) ⇒ Object
- #find_with_ids(*ids) ⇒ Object
- #last(limit = nil) ⇒ Object
- #limited_ids_for(relation) ⇒ Object
- #ordered_relation ⇒ Object
Instance Method Details
#apply_join_dependency(join_dependency = construct_join_dependency) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 4 def apply_join_dependency(join_dependency = construct_join_dependency) relation = except(:includes, :eager_load, :preload).joins!(join_dependency) if using_limitable_reflections?(join_dependency.reflections) relation else if relation.limit_value limited_ids = limited_ids_for(relation) # CPK # limited_ids.empty? ? relation.none! : relation.where!(primary_key => limited_ids) limited_ids.empty? ? relation.none! : relation.where!(cpk_in_predicate(table, self.primary_keys, limited_ids)) end relation.except(:limit, :offset) end end |
#construct_relation_for_exists(conditions) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 44 def construct_relation_for_exists(conditions) relation = except(:select, :distinct, :order)._select!(::ActiveRecord::FinderMethods::ONE_AS_ONE).limit!(1) case conditions # CPK when CompositePrimaryKeys::CompositeKeys relation = relation.where(cpk_id_predicate(table, primary_key, conditions)) # CPK when Array pk_length = @klass.primary_keys.length if conditions.length == pk_length # E.g. conditions = ['France', 'Paris'] return self.construct_relation_for_exists(conditions.to_composite_keys) else # Assume that conditions contains where relation relation = relation.where(conditions) end when Array, Hash relation.where!(conditions) else relation.where!(primary_key => conditions) unless conditions == :none end relation end |
#find_one(id) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 126 def find_one(id) # CPK # if ActiveRecord::Base === id if ::ActiveRecord::Base === id id = id.id ActiveSupport::Deprecation.warn("You are passing an instance of ActiveRecord::Base to `find`.\nPlease pass the id of the object by calling `.id`\n".squish) end # CPK #relation = where(primary_key => id) relation = where(cpk_id_predicate(table, primary_keys, id)) record = relation.take raise_record_not_found_exception!(id, 0, 1) unless record record end |
#find_some(ids) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 147 def find_some(ids) # CPK if composite? ids = if ids.length == 1 ids.first.split(CompositePrimaryKeys::ID_SEP).to_composite_keys else ids.to_composite_keys end end return find_some_ordered(ids) unless order_values.present? # CPK # result = where(primary_key => ids).to_a result = if composite? result = where(cpk_in_predicate(table, primary_keys, ids)).to_a else result = where(primary_key => ids).to_a end expected_size = if limit_value && ids.size > limit_value limit_value else ids.size end # 11 ids with limit 3, offset 9 should give 2 results. if offset_value && (ids.size - offset_value < expected_size) expected_size = ids.size - offset_value end if result.size == expected_size result else raise_record_not_found_exception!(ids, result.size, expected_size) end end |
#find_some_ordered(ids) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 186 def find_some_ordered(ids) ids = ids.slice(offset_value || 0, limit_value || ids.size) || [] # CPK # result = except(:limit, :offset).where(primary_key => ids).records result = if composite? except(:limit, :offset).where(cpk_in_predicate(table, primary_keys, ids)).records else except(:limit, :offset).where(primary_key => ids).records end if result.size == ids.size pk_type = @klass.type_for_attribute(primary_key) records_by_id = result.index_by(&:id) # CPK # ids.map { |id| records_by_id.fetch(pk_type.cast(id)) } if composite? ids.map do |id| typecasted_id = primary_keys.zip(id).map do |col, val| @klass.type_for_attribute(col).cast(val) end records_by_id.fetch(typecasted_id) end else ids.map { |id| records_by_id.fetch(pk_type.cast(id)) } end else raise_record_not_found_exception!(ids, result.size, ids.size) end end |
#find_with_ids(*ids) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 69 def find_with_ids(*ids) raise UnknownPrimaryKey.new(@klass) if primary_key.nil? # CPK # expects_array = ids.first.kind_of?(Array) ids = CompositePrimaryKeys.normalize(ids) expects_array = ids.flatten != ids.flatten(1) return ids.first if expects_array && ids.first.empty? # CPK # ids = ids.flatten.compact.uniq ids = expects_array ? ids.first : ids model_name = @klass.name case ids.size when 0 = "Couldn't find #{model_name} without an ID" raise RecordNotFound.new(, model_name, primary_key) when 1 result = find_one(ids.first) expects_array ? [ result ] : result else find_some(ids) end rescue ::RangeError = "Couldn't find #{model_name} with an out of range ID" raise RecordNotFound.new(, model_name, primary_key, ids) end |
#last(limit = nil) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 99 def last(limit = nil) return find_last(limit) if loaded? || limit_value result = limit(limit || 1) # CPK # result.order!(arel_attribute(primary_key)) if order_values.empty? && primary_key if order_values.empty? && primary_key if composite? result.order!(primary_keys.map { |pk| arel_attribute(pk).asc }) elsif result.order!(arel_attribute(primary_key)) end end result = result.reverse_order! limit ? result.reverse : result.first rescue ::ActiveRecord::IrreversibleOrderError ActiveSupport::Deprecation.warn("Finding a last element by loading the relation when SQL ORDER\ncan not be reversed is deprecated.\nRails 5.1 will raise ActiveRecord::IrreversibleOrderError in this case.\nPlease call `to_a.last` if you still want to load the relation.\n".squish) find_last(limit) end |
#limited_ids_for(relation) ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 20 def limited_ids_for(relation) # CPK # values = @klass.connection.columns_for_distinct( # connection.column_name_from_arel_node(arel_attribute(primary_key)), # relation.order_values # ) columns = @klass.primary_keys.map do |key| connection.column_name_from_arel_node(arel_attribute(key)) end values = @klass.connection.columns_for_distinct(columns, relation.order_values) relation = relation.except(:select).select(values).distinct! id_rows = skip_query_cache_if_necessary { @klass.connection.select_all(relation.arel, "SQL") } # CPK #id_rows.map { |row| row[primary_key] } id_rows.map do |row| @klass.primary_keys.map do |key| row[key] end end end |
#ordered_relation ⇒ Object
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# File 'lib/composite_primary_keys/relation/finder_methods.rb', line 218 def ordered_relation if order_values.empty? && primary_key # CPK #order(arel_attribute(primary_key).asc) order(Array(primary_key).map {|key| arel_attribute(key).asc}) else self end end |