Module: ActiveRecord::Core::ClassMethods

Defined in:
lib/active_record/core.rb

Instance Method Summary collapse

Instance Method Details

#arel_table ⇒ Object

Returns an instance of Arel::Table loaded with the current table name.



368
369
370
 
# File 'lib/active_record/core.rb', line 368

def arel_table # :nodoc:
  @arel_table ||= Arel::Table.new(table_name, klass: self)
end

#cached_find_by_statement(connection, key, &block) ⇒ Object

:nodoc:



380
381
382
383
 
# File 'lib/active_record/core.rb', line 380

def cached_find_by_statement(connection, key, &block) # :nodoc:
  cache = @find_by_statement_cache[connection.prepared_statements]
  cache.compute_if_absent(key) { StatementCache.create(connection, &block) }
end

#filter_attributes ⇒ Object

Returns columns which shouldn’t be exposed while calling #inspect.



326
327
328
329
330
331
332
 
# File 'lib/active_record/core.rb', line 326

def filter_attributes
  if @filter_attributes.nil?
    superclass.filter_attributes
  else
    @filter_attributes
  end
end

#filter_attributes=(filter_attributes) ⇒ Object

Specifies columns which shouldn’t be exposed while calling #inspect.



335
336
337
338
 
# File 'lib/active_record/core.rb', line 335

def filter_attributes=(filter_attributes)
  @inspection_filter = nil
  @filter_attributes = filter_attributes
end

#find(*ids) ⇒ Object

:nodoc:



247
248
249
250
251
252
253
254
255
256
257
258
 
# File 'lib/active_record/core.rb', line 247

def find(*ids) # :nodoc:
  # We don't have cache keys for this stuff yet
  return super unless ids.length == 1
  return super if block_given? || primary_key.nil? || scope_attributes?

  id = ids.first

  return super if StatementCache.unsupported_value?(id)

  cached_find_by([primary_key], [id]) ||
    raise(RecordNotFound.new("Couldn't find #{name} with '#{primary_key}'=#{id}", name, primary_key, id))
end

#find_by(*args) ⇒ Object

:nodoc:



260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
 
# File 'lib/active_record/core.rb', line 260

def find_by(*args) # :nodoc:
  return super if scope_attributes?

  hash = args.first
  return super unless Hash === hash

  hash = hash.each_with_object({}) do |(key, value), h|
    key = key.to_s
    key = attribute_aliases[key] || key

    return super if reflect_on_aggregation(key)

    reflection = _reflect_on_association(key)

    if !reflection
      value = value.id if value.respond_to?(:id)
    elsif reflection.belongs_to? && !reflection.polymorphic?
      key = reflection.join_foreign_key
      pkey = reflection.join_primary_key

      if pkey.is_a?(Array)
        if pkey.all? { |attribute| value.respond_to?(attribute) }
          value = pkey.map do |attribute|
            if attribute == "id"
              value.id_value
            else
              value.public_send(attribute)
            end
          end
          composite_primary_key = true
        end
      else
        value = value.public_send(pkey) if value.respond_to?(pkey)
      end
    end

    if !composite_primary_key &&
      (!columns_hash.key?(key) || StatementCache.unsupported_value?(value))
      return super
    end

    h[key] = value
  end

  cached_find_by(hash.keys, hash.values)
end

#find_by!(*args) ⇒ Object

:nodoc:



307
308
309
 
# File 'lib/active_record/core.rb', line 307

def find_by!(*args) # :nodoc:
  find_by(*args) || where(*args).raise_record_not_found_exception!
end

#generated_association_methods ⇒ Object

:nodoc:



315
316
317
318
319
320
321
322
323
 
# File 'lib/active_record/core.rb', line 315

def generated_association_methods # :nodoc:
  @generated_association_methods ||= begin
    mod = const_set(:GeneratedAssociationMethods, Module.new)
    private_constant :GeneratedAssociationMethods
    include mod

    mod
  end
end

#initialize_find_by_cache ⇒ Object

:nodoc:



243
244
245
 
# File 'lib/active_record/core.rb', line 243

def initialize_find_by_cache # :nodoc:
  @find_by_statement_cache = { true => Concurrent::Map.new, false => Concurrent::Map.new }
end

#initialize_generated_modules ⇒ Object

:nodoc:



311
312
313
 
# File 'lib/active_record/core.rb', line 311

def initialize_generated_modules # :nodoc:
  generated_association_methods
end

#inspect ⇒ Object

Returns a string like ‘Post(id:integer, title:string, body:text)’



352
353
354
355
356
357
358
359
360
361
362
363
364
365
 
# File 'lib/active_record/core.rb', line 352

def inspect # :nodoc:
  if self == Base || singleton_class?
    super
  elsif abstract_class?
    "#{super}(abstract)"
  elsif !schema_loaded? && !connected?
    "#{super} (call '#{super}.load_schema' to load schema informations)"
  elsif table_exists?
    attr_list = attribute_types.map { |name, type| "#{name}: #{type.type}" } * ", "
    "#{super}(#{attr_list})"
  else
    "#{super}(Table doesn't exist)"
  end
end

#inspection_filter ⇒ Object

:nodoc:



340
341
342
343
344
345
346
347
348
349
 
# File 'lib/active_record/core.rb', line 340

def inspection_filter # :nodoc:
  if @filter_attributes.nil?
    superclass.inspection_filter
  else
    @inspection_filter ||= begin
      mask = InspectionMask.new(ActiveSupport::ParameterFilter::FILTERED)
      ActiveSupport::ParameterFilter.new(@filter_attributes, mask: mask)
    end
  end
end

#predicate_builder ⇒ Object

:nodoc:



372
373
374
 
# File 'lib/active_record/core.rb', line 372

def predicate_builder # :nodoc:
  @predicate_builder ||= PredicateBuilder.new(table_metadata)
end

#type_caster ⇒ Object

:nodoc:



376
377
378
 
# File 'lib/active_record/core.rb', line 376

def type_caster # :nodoc:
  TypeCaster::Map.new(self)
end