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 309 def many_to_pg_array(name, opts=OPTS, &block) 310 associate(:many_to_pg_array, name, opts, &block) 311 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 316 def pg_array_to_many(name, opts=OPTS, &block) 317 associate(:pg_array_to_many, name, opts, &block) 318 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 323 def def_many_to_pg_array(opts) 324 name = opts[:name] 325 model = self 326 pk = opts[:eager_loader_key] = opts[:primary_key] ||= model.primary_key 327 raise(Error, "no primary key specified for #{inspect}") unless pk 328 opts[:key] = opts.default_key unless opts.has_key?(:key) 329 key = opts[:key] 330 key_column = opts[:key_column] ||= opts[:key] 331 if opts[:uniq] 332 opts[:after_load] ||= [] 333 opts[:after_load].unshift(:array_uniq!) 334 end 335 opts[:dataset] ||= lambda do 336 opts.associated_dataset.where(Sequel.pg_array_op(opts.predicate_key).contains(Sequel.pg_array([get_column_value(pk)], opts.array_type))) 337 end 338 opts[:eager_loader] ||= proc do |eo| 339 id_map = eo[:id_map] 340 eo = Hash[eo] 341 eo[:loader] = false 342 343 eager_load_results(opts, eo) do |assoc_record| 344 if pks = assoc_record.get_column_value(key) 345 pks.each do |pkv| 346 id_map[pkv].each do |object| 347 object.associations[name].push(assoc_record) 348 end 349 end 350 end 351 end 352 end 353 354 join_type = opts[:graph_join_type] 355 select = opts[:graph_select] 356 opts[:cartesian_product_number] ||= 1 357 358 if opts.include?(:graph_only_conditions) 359 conditions = opts[:graph_only_conditions] 360 graph_block = opts[:graph_block] 361 else 362 conditions = opts[:graph_conditions] 363 conditions = nil if conditions.empty? 364 graph_block = proc do |j, lj, js| 365 Sequel.pg_array_op(Sequel.deep_qualify(j, key_column)).contains([Sequel.deep_qualify(lj, opts.primary_key)]) 366 end 367 368 if orig_graph_block = opts[:graph_block] 369 pg_array_graph_block = graph_block 370 graph_block = proc do |j, lj, js| 371 Sequel.&(orig_graph_block.call(j,lj,js), pg_array_graph_block.call(j, lj, js)) 372 end 373 end 374 end 375 376 opts[:eager_grapher] ||= proc do |eo| 377 ds = eo[:self] 378 ds = ds.graph(eager_graph_dataset(opts, eo), conditions, eo.merge(:select=>select, :join_type=>eo[:join_type]||join_type, :qualify=>:deep), &graph_block) 379 ds 380 end 381 382 return if opts[:read_only] 383 384 save_opts = {:validate=>opts[:validate]} 385 save_opts[:raise_on_failure] = opts[:raise_on_save_failure] != false 386 387 opts[:adder] ||= proc do |o| 388 if array = o.get_column_value(key) 389 array << get_column_value(pk) 390 else 391 o.set_column_value("#{key}=", Sequel.pg_array([get_column_value(pk)], opts.array_type)) 392 end 393 o.save(save_opts) 394 end 395 396 opts[:remover] ||= proc do |o| 397 if (array = o.get_column_value(key)) && !array.empty? 398 array.delete(get_column_value(pk)) 399 o.save(save_opts) 400 end 401 end 402 403 opts[:clearer] ||= proc do 404 pk_value = get_column_value(pk) 405 db_type = opts.array_type 406 opts.associated_dataset.where(Sequel.pg_array_op(key).contains(Sequel.pg_array([pk_value], db_type))).update(key=>Sequel.function(:array_remove, key, Sequel.cast(pk_value, db_type))) 407 end 408 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 411 def def_pg_array_to_many(opts) 412 name = opts[:name] 413 opts[:key] = opts.default_key unless opts.has_key?(:key) 414 key = opts[:key] 415 key_column = opts[:key_column] ||= key 416 opts[:eager_loader_key] = nil 417 if opts[:uniq] 418 opts[:after_load] ||= [] 419 opts[:after_load].unshift(:array_uniq!) 420 end 421 opts[:dataset] ||= lambda do 422 opts.associated_dataset.where(opts.predicate_key=>get_column_value(key).to_a) 423 end 424 opts[:eager_loader] ||= proc do |eo| 425 rows = eo[:rows] 426 id_map = {} 427 pkm = opts.primary_key_method 428 429 Sequel.synchronize_with(eo[:mutex]) do 430 rows.each do |object| 431 if associated_pks = object.get_column_value(key) 432 associated_pks.each do |apk| 433 (id_map[apk] ||= []) << object 434 end 435 end 436 end 437 end 438 439 eo = Hash[eo] 440 eo[:id_map] = id_map 441 eager_load_results(opts, eo) do |assoc_record| 442 if objects = id_map[assoc_record.get_column_value(pkm)] 443 objects.each do |object| 444 object.associations[name].push(assoc_record) 445 end 446 end 447 end 448 end 449 450 join_type = opts[:graph_join_type] 451 select = opts[:graph_select] 452 opts[:cartesian_product_number] ||= 1 453 454 if opts.include?(:graph_only_conditions) 455 conditions = opts[:graph_only_conditions] 456 graph_block = opts[:graph_block] 457 else 458 conditions = opts[:graph_conditions] 459 conditions = nil if conditions.empty? 460 graph_block = proc do |j, lj, js| 461 Sequel.pg_array_op(Sequel.deep_qualify(lj, key_column)).contains([Sequel.deep_qualify(j, opts.primary_key)]) 462 end 463 464 if orig_graph_block = opts[:graph_block] 465 pg_array_graph_block = graph_block 466 graph_block = proc do |j, lj, js| 467 Sequel.&(orig_graph_block.call(j,lj,js), pg_array_graph_block.call(j, lj, js)) 468 end 469 end 470 end 471 472 opts[:eager_grapher] ||= proc do |eo| 473 ds = eo[:self] 474 ds = ds.graph(eager_graph_dataset(opts, eo), conditions, eo.merge(:select=>select, :join_type=>eo[:join_type]||join_type, :qualify=>:deep), &graph_block) 475 ds 476 end 477 478 return if opts[:read_only] 479 480 save_opts = {:validate=>opts[:validate]} 481 save_opts[:raise_on_failure] = opts[:raise_on_save_failure] != false 482 483 if opts[:save_after_modify] 484 save_after_modify = proc do |obj| 485 obj.save(save_opts) 486 end 487 end 488 489 opts[:adder] ||= proc do |o| 490 opk = o.get_column_value(opts.primary_key) 491 if array = get_column_value(key) 492 modified!(key) 493 array << opk 494 else 495 set_column_value("#{key}=", Sequel.pg_array([opk], opts.array_type)) 496 end 497 save_after_modify.call(self) if save_after_modify 498 end 499 500 opts[:remover] ||= proc do |o| 501 if (array = get_column_value(key)) && !array.empty? 502 modified!(key) 503 array.delete(o.get_column_value(opts.primary_key)) 504 save_after_modify.call(self) if save_after_modify 505 end 506 end 507 508 opts[:clearer] ||= proc do 509 if (array = get_column_value(key)) && !array.empty? 510 modified!(key) 511 array.clear 512 save_after_modify.call(self) if save_after_modify 513 end 514 end 515 end