module Sequel::Plugins::PgArrayAssociations::ClassMethods
Public Instance Methods
many_to_pg_array(name, opts=OPTS, &block)
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Create a #many_to_pg_array association, for the case where the associated table contains the array with foreign keys pointing to the current table. See associate for options.
# File lib/sequel/plugins/pg_array_associations.rb, line 304 def many_to_pg_array(name, opts=OPTS, &block) associate(:many_to_pg_array, name, opts, &block) end
pg_array_to_many(name, opts=OPTS, &block)
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Create a #pg_array_to_many association, for the case where the current table contains the array with foreign keys pointing to the associated table. See associate for options.
# File lib/sequel/plugins/pg_array_associations.rb, line 311 def pg_array_to_many(name, opts=OPTS, &block) associate(:pg_array_to_many, name, opts, &block) end
Private Instance Methods
def_many_to_pg_array(opts)
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Setup the many_to_pg_array-specific datasets, eager loaders, and modification methods.
# File lib/sequel/plugins/pg_array_associations.rb, line 318 def def_many_to_pg_array(opts) name = opts[:name] model = self pk = opts[:eager_loader_key] = opts[:primary_key] ||= model.primary_key raise(Error, "no primary key specified for #{inspect}") unless pk opts[:key] = opts.default_key unless opts.has_key?(:key) key = opts[:key] key_column = opts[:key_column] ||= opts[:key] opts[:after_load].unshift(:array_uniq!) if opts[:uniq] opts[:dataset] ||= lambda do opts.associated_dataset.where(Sequel.pg_array_op(opts.predicate_key).contains(Sequel.pg_array([get_column_value(pk)], opts.array_type))) end opts[:eager_loader] ||= proc do |eo| id_map = eo[:id_map] eager_load_results(opts, Hash[eo].merge!(:loader=>false)) do |assoc_record| if pks ||= assoc_record.get_column_value(key) pks.each do |pkv| next unless objects = id_map[pkv] objects.each do |object| object.associations[name].push(assoc_record) end end end end end join_type = opts[:graph_join_type] select = opts[:graph_select] opts[:cartesian_product_number] ||= 1 if opts.include?(:graph_only_conditions) conditions = opts[:graph_only_conditions] graph_block = opts[:graph_block] else conditions = opts[:graph_conditions] conditions = nil if conditions.empty? graph_block = proc do |j, lj, js| Sequel.pg_array_op(Sequel.deep_qualify(j, key_column)).contains([Sequel.deep_qualify(lj, opts.primary_key)]) end if orig_graph_block = opts[:graph_block] pg_array_graph_block = graph_block graph_block = proc do |j, lj, js| Sequel.&(orig_graph_block.call(j,lj,js), pg_array_graph_block.call(j, lj, js)) end end end opts[:eager_grapher] ||= proc do |eo| ds = eo[:self] ds = ds.graph(eager_graph_dataset(opts, eo), conditions, Hash[eo].merge!(:select=>select, :join_type=>eo[:join_type]||join_type, :qualify=>:deep, :from_self_alias=>eo[:from_self_alias]), &graph_block) ds end return if opts[:read_only] save_opts = {:validate=>opts[:validate]} save_opts[:raise_on_failure] = opts[:raise_on_save_failure] != false opts[:adder] ||= proc do |o| if array = o.get_column_value(key) array << get_column_value(pk) else o.set_column_value("#{key}=", Sequel.pg_array([get_column_value(pk)], opts.array_type)) end o.save(save_opts) end opts[:remover] ||= proc do |o| if (array = o.get_column_value(key)) && !array.empty? array.delete(get_column_value(pk)) o.save(save_opts) end end opts[:clearer] ||= proc do opts.associated_dataset.where(Sequel.pg_array_op(key).contains([get_column_value(pk)])).update(key=>Sequel.function(:array_remove, key, get_column_value(pk))) end end
def_pg_array_to_many(opts)
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Setup the pg_array_to_many-specific datasets, eager loaders, and modification methods.
# File lib/sequel/plugins/pg_array_associations.rb, line 400 def def_pg_array_to_many(opts) name = opts[:name] opts[:key] = opts.default_key unless opts.has_key?(:key) key = opts[:key] key_column = opts[:key_column] ||= key opts[:eager_loader_key] = nil opts[:after_load].unshift(:array_uniq!) if opts[:uniq] opts[:dataset] ||= lambda do opts.associated_dataset.where(opts.predicate_key=>get_column_value(key).to_a) end opts[:eager_loader] ||= proc do |eo| rows = eo[:rows] id_map = {} pkm = opts.primary_key_method rows.each do |object| if associated_pks = object.get_column_value(key) associated_pks.each do |apk| (id_map[apk] ||= []) << object end end end eager_load_results(opts, Hash[eo].merge!(:id_map=>id_map)) do |assoc_record| if objects = id_map[assoc_record.get_column_value(pkm)] objects.each do |object| object.associations[name].push(assoc_record) end end end end join_type = opts[:graph_join_type] select = opts[:graph_select] opts[:cartesian_product_number] ||= 1 if opts.include?(:graph_only_conditions) conditions = opts[:graph_only_conditions] graph_block = opts[:graph_block] else conditions = opts[:graph_conditions] conditions = nil if conditions.empty? graph_block = proc do |j, lj, js| Sequel.pg_array_op(Sequel.deep_qualify(lj, key_column)).contains([Sequel.deep_qualify(j, opts.primary_key)]) end if orig_graph_block = opts[:graph_block] pg_array_graph_block = graph_block graph_block = proc do |j, lj, js| Sequel.&(orig_graph_block.call(j,lj,js), pg_array_graph_block.call(j, lj, js)) end end end opts[:eager_grapher] ||= proc do |eo| ds = eo[:self] ds = ds.graph(eager_graph_dataset(opts, eo), conditions, Hash[eo].merge!(:select=>select, :join_type=>eo[:join_type]||join_type, :qualify=>:deep, :from_self_alias=>eo[:from_self_alias]), &graph_block) ds end return if opts[:read_only] save_opts = {:validate=>opts[:validate]} save_opts[:raise_on_failure] = opts[:raise_on_save_failure] != false if opts[:save_after_modify] save_after_modify = proc do |obj| obj.save(save_opts) end end opts[:adder] ||= proc do |o| opk = o.get_column_value(opts.primary_key) if array = get_column_value(key) modified!(key) array << opk else set_column_value("#{key}=", Sequel.pg_array([opk], opts.array_type)) end save_after_modify.call(self) if save_after_modify end opts[:remover] ||= proc do |o| if (array = get_column_value(key)) && !array.empty? modified!(key) array.delete(o.get_column_value(opts.primary_key)) save_after_modify.call(self) if save_after_modify end end opts[:clearer] ||= proc do if (array = get_column_value(key)) && !array.empty? modified!(key) array.clear save_after_modify.call(self) if save_after_modify end end end