Module: ActiveRecord::Core::ClassMethods
- Defined in:
- activerecord/lib/active_record/core.rb
Instance Attribute Summary collapse
-
#filter_attributes ⇒ Object
Returns columns which shouldn’t be exposed while calling
#inspect
.
Instance Method Summary collapse
-
#===(object) ⇒ Object
Overwrite the default class equality method to provide support for decorated models.
-
#_internal? ⇒ Boolean
:nodoc:.
-
#arel_attribute(name, table = arel_table) ⇒ Object
:nodoc:.
-
#arel_table ⇒ Object
Returns an instance of
Arel::Table
loaded with the current table name. -
#find(*ids) ⇒ Object
:nodoc:.
-
#find_by(*args) ⇒ Object
:nodoc:.
-
#find_by!(*args) ⇒ Object
:nodoc:.
-
#generated_association_methods ⇒ Object
:nodoc:.
-
#inherited(child_class) ⇒ Object
:nodoc:.
-
#initialize_find_by_cache ⇒ Object
:nodoc:.
-
#initialize_generated_modules ⇒ Object
:nodoc:.
-
#inspect ⇒ Object
Returns a string like ‘Post(id:integer, title:string, body:text)’.
-
#predicate_builder ⇒ Object
:nodoc:.
-
#type_caster ⇒ Object
:nodoc:.
Instance Attribute Details
#filter_attributes ⇒ Object
Returns columns which shouldn’t be exposed while calling #inspect
.
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# File 'activerecord/lib/active_record/core.rb', line 231 def filter_attributes if defined?(@filter_attributes) @filter_attributes else superclass.filter_attributes end end |
Instance Method Details
#===(object) ⇒ Object
Overwrite the default class equality method to provide support for decorated models.
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# File 'activerecord/lib/active_record/core.rb', line 259 def ===(object) # :nodoc: object.is_a?(self) end |
#_internal? ⇒ Boolean
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 286 def _internal? # :nodoc: false end |
#arel_attribute(name, table = arel_table) ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 272 def arel_attribute(name, table = arel_table) # :nodoc: name = name.to_s name = attribute_aliases[name] || name table[name] end |
#arel_table ⇒ Object
Returns an instance of Arel::Table
loaded with the current table name.
class Post < ActiveRecord::Base
scope :published_and_commented, -> { published.and(arel_table[:comments_count].gt(0)) }
end
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# File 'activerecord/lib/active_record/core.rb', line 268 def arel_table # :nodoc: @arel_table ||= Arel::Table.new(table_name, type_caster: type_caster) end |
#find(*ids) ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 159 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? || columns_hash.key?(inheritance_column) && !base_class? id = ids.first return super if StatementCache.unsupported_value?(id) key = primary_key statement = cached_find_by_statement(key) { |params| where(key => params.bind).limit(1) } record = statement.execute([id], connection)&.first unless record raise RecordNotFound.new("Couldn't find #{name} with '#{key}'=#{id}", name, key, id) end record end |
#find_by(*args) ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 184 def find_by(*args) # :nodoc: return super if scope_attributes? || reflect_on_all_aggregations.any? || columns_hash.key?(inheritance_column) && !base_class? hash = args.first return super if !(Hash === hash) || hash.values.any? { |v| StatementCache.unsupported_value?(v) } # We can't cache Post.find_by(author: david) ...yet return super unless hash.keys.all? { |k| columns_hash.has_key?(k.to_s) } keys = hash.keys statement = cached_find_by_statement(keys) { |params| wheres = keys.each_with_object({}) { |param, o| o[param] = params.bind } where(wheres).limit(1) } begin statement.execute(hash.values, connection)&.first rescue TypeError raise ActiveRecord::StatementInvalid end end |
#find_by!(*args) ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 212 def find_by!(*args) # :nodoc: find_by(*args) || raise(RecordNotFound.new("Couldn't find #{name}", name)) end |
#generated_association_methods ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 220 def generated_association_methods # :nodoc: @generated_association_methods ||= begin mod = const_set(:GeneratedAssociationMethods, Module.new) private_constant :GeneratedAssociationMethods include mod mod end end |
#inherited(child_class) ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 153 def inherited(child_class) # :nodoc: # initialize cache at class definition for thread safety child_class.initialize_find_by_cache super end |
#initialize_find_by_cache ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 149 def initialize_find_by_cache # :nodoc: @find_by_statement_cache = { true => Concurrent::Map.new, false => Concurrent::Map.new } end |
#initialize_generated_modules ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 216 def initialize_generated_modules # :nodoc: generated_association_methods end |
#inspect ⇒ Object
Returns a string like ‘Post(id:integer, title:string, body:text)’
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# File 'activerecord/lib/active_record/core.rb', line 243 def inspect # :nodoc: if self == Base super elsif abstract_class? "#{super}(abstract)" elsif !connected? "#{super} (call '#{super}.connection' to establish a connection)" elsif table_exists? attr_list = attribute_types.map { |name, type| "#{name}: #{type.type}" } * ", " "#{super}(#{attr_list})" else "#{super}(Table doesn't exist)" end end |
#predicate_builder ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 278 def predicate_builder # :nodoc: @predicate_builder ||= PredicateBuilder.new() end |
#type_caster ⇒ Object
:nodoc:
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# File 'activerecord/lib/active_record/core.rb', line 282 def type_caster # :nodoc: TypeCaster::Map.new(self) end |