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Constants

ID_ATTRIBUTE_METHODS = %w(id id= id? id_before_type_cast id_was id_in_database id_for_database).to_set.freeze
 

Instance Public methods

dangerous_attribute_method?(method_name)

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 74
def dangerous_attribute_method?(method_name)
  super && !ID_ATTRIBUTE_METHODS.include?(method_name)
end

instance_method_already_implemented?(method_name)

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 70
def instance_method_already_implemented?(method_name)
  super || primary_key && ID_ATTRIBUTE_METHODS.include?(method_name)
end

primary_key()

Defines the primary key field – can be overridden in subclasses. Overwriting will negate any effect of the primary_key_prefix_type setting, though.

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 81
def primary_key
  primary_key_definition.name
end

primary_key=(value)

Sets the name of the primary key column.

class Project < ActiveRecord::Base
  self.primary_key = 'sysid'
end

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 127
def primary_key=(value)
  @primary_key_definition = ActiveRecord::Key.for(value)
  @primary_key_inherited = false

  include CompositePrimaryKey if primary_key_definition.composite?

  # Only invalidate loaded contexts; initial schema loading can resolve the primary key.
  ([self] + descendants).each do |model|
    model.clear_inherited_primary_key
    model.reload_schema_from_cache(false) if model.schema_loaded?
    # Regenerate so the id_value reader is replaced by an alias.
    model.undefine_attribute_methods if primary_key_definition.composite? && model.attribute_methods_generated?
  end
end

quoted_primary_key()

Returns a quoted version of the primary key name.

Source: show | on GitHub 

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 94
def quoted_primary_key
  adapter_class.quote_column_name(primary_key)
end