Class: ActiveRecord::Reflection::AssociationReflection
Overview
Holds all the meta-data about an association as it was specified in the Active Record class.
Instance Attribute Summary
#active_record
Instance Method Summary
collapse
#==, #belongs_to?, #class_name, #initialize, #macro, #name, #options, #sanitized_conditions
Instance Method Details
#association_foreign_key ⇒ Object
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# File 'lib/active_record/reflection.rb', line 194
def association_foreign_key
@association_foreign_key ||= @options[:association_foreign_key] || class_name.foreign_key
end
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#build_association(*options) ⇒ Object
Returns a new, unsaved instance of the associated class. options
will be passed to the class’s constructor.
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# File 'lib/active_record/reflection.rb', line 161
def build_association(*options)
klass.new(*options)
end
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#check_validity! ⇒ Object
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# File 'lib/active_record/reflection.rb', line 214
def check_validity!
end
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#columns(tbl_name, log_msg) ⇒ Object
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# File 'lib/active_record/reflection.rb', line 206
def columns(tbl_name, log_msg)
@columns ||= klass.connection.columns(tbl_name, log_msg)
end
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#counter_cache_column ⇒ Object
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# File 'lib/active_record/reflection.rb', line 198
def counter_cache_column
if options[:counter_cache] == true
"#{active_record.name.demodulize.underscore.pluralize}_count"
elsif options[:counter_cache]
options[:counter_cache]
end
end
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#create_association(*options) ⇒ Object
Creates a new instance of the associated class, and immediates saves it with ActiveRecord::Base#save. options
will be passed to the class’s creation method. Returns the newly created object.
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# File 'lib/active_record/reflection.rb', line 168
def create_association(*options)
klass.create(*options)
end
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#create_association!(*options) ⇒ Object
Creates a new instance of the associated class, and immediates saves it with ActiveRecord::Base#save!. options
will be passed to the class’s creation method. If the created record doesn’t pass validations, then an exception will be raised.
Returns the newly created object.
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# File 'lib/active_record/reflection.rb', line 178
def create_association!(*options)
klass.create!(*options)
end
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#klass ⇒ Object
Returns the target association’s class:
class Author < ActiveRecord::Base
has_many :books
end
Author.reflect_on_association(:books).klass
Note: do not call klass.new
or klass.create
to instantiate a new association object. Use build_association
or create_association
instead. This allows plugins to hook into association object creation.
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# File 'lib/active_record/reflection.rb', line 155
def klass
@klass ||= active_record.send(:compute_type, class_name)
end
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#primary_key_name ⇒ Object
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# File 'lib/active_record/reflection.rb', line 190
def primary_key_name
@primary_key_name ||= options[:foreign_key] || derive_primary_key_name
end
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#quoted_table_name ⇒ Object
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# File 'lib/active_record/reflection.rb', line 186
def quoted_table_name
@quoted_table_name ||= klass.quoted_table_name
end
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# File 'lib/active_record/reflection.rb', line 210
def reset_column_information
@columns = nil
end
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#source_reflection ⇒ Object
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# File 'lib/active_record/reflection.rb', line 224
def source_reflection
nil
end
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#table_name ⇒ Object
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# File 'lib/active_record/reflection.rb', line 182
def table_name
@table_name ||= klass.table_name
end
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#through_reflection ⇒ Object
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# File 'lib/active_record/reflection.rb', line 217
def through_reflection
false
end
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#through_reflection_primary_key_name ⇒ Object
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# File 'lib/active_record/reflection.rb', line 221
def through_reflection_primary_key_name
end
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