# File lib/active_record/attribute_methods/primary_key.rb, line 70 def primary_key @primary_key = reset_primary_key unless defined? @primary_key @primary_key end
module ActiveRecord::AttributeMethods::PrimaryKey::ClassMethods
Constants
- ID_ATTRIBUTE_METHODS
Public Instance Methods
dangerous_attribute_method?(method_name)
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Calls superclass method
# File lib/active_record/attribute_methods/primary_key.rb, line 63 def dangerous_attribute_method?(method_name) super && !ID_ATTRIBUTE_METHODS.include?(method_name) end
instance_method_already_implemented?(method_name)
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Calls superclass method
# File lib/active_record/attribute_methods/primary_key.rb, line 59 def instance_method_already_implemented?(method_name) super || primary_key && ID_ATTRIBUTE_METHODS.include?(method_name) end
primary_key()
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Defines the primary key field – can be overridden in subclasses. Overwriting will negate any effect of the primary_key_prefix_type
setting, though.
primary_key=(value)
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Sets the name of the primary key column.
class Project < ActiveRecord::Base self.primary_key = 'sysid' end
You can also define the primary_key
method yourself:
class Project < ActiveRecord::Base def self.primary_key 'foo_' + super end end Project.primary_key # => "foo_id"
# File lib/active_record/attribute_methods/primary_key.rb, line 119 def primary_key=(value) @primary_key = value && -value.to_s @quoted_primary_key = nil @attributes_builder = nil end
quoted_primary_key()
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Returns a quoted version of the primary key name, used to construct SQL statements.
# File lib/active_record/attribute_methods/primary_key.rb, line 77 def quoted_primary_key @quoted_primary_key ||= connection.quote_column_name(primary_key) end
Private Instance Methods
suppress_composite_primary_key(pk)
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# File lib/active_record/attribute_methods/primary_key.rb, line 126 def suppress_composite_primary_key(pk) return pk unless pk.is_a?(Array) warn <<~WARNING WARNING: Active Record does not support composite primary key. #{table_name} has composite primary key. Composite primary key is ignored. WARNING end