Module: DatastaxRails::AttributeMethods::PrimaryKey::ClassMethods

Defined in:
lib/datastax_rails/attribute_methods/primary_key.rb

Overview

:nodoc:

Constant Summary collapse

ID_ATTRIBUTE_METHODS =
%w(id id= id? id_before_type_cast).to_set

Instance Method Summary collapse

Instance Method Details

#define_method_attribute(attr_name) ⇒ Object


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# File 'lib/datastax_rails/attribute_methods/primary_key.rb', line 52

def define_method_attribute(attr_name)
  super

  if attr_name == primary_key && attr_name != 'id'
    generated_attribute_methods.send(:alias_method, :id, primary_key)
  end
end

#next_keyObject


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# File 'lib/datastax_rails/attribute_methods/primary_key.rb', line 95

def next_key
  Cassandra::TimeUuid::Generator.new.now.to_s
end

#primary_keyObject

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


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# File 'lib/datastax_rails/attribute_methods/primary_key.rb', line 65

def primary_key
  @primary_key || 'id'
end

#primary_key=(value) ⇒ Object

Sets the name of the primary key column.

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

You can also define the primary_key method yourself:

class Project < DatastaxRails::Base
  def self.primary_key
    'foo_' + super
  end
end

Project.primary_key # => "foo_id"

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# File 'lib/datastax_rails/attribute_methods/primary_key.rb', line 90

def primary_key=(value)
  @primary_key        = value && value.to_s
  @quoted_primary_key = nil
end

#quoted_primary_keyObject

Returns a quoted version of the primary key name, used to construct CQL statements.


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# File 'lib/datastax_rails/attribute_methods/primary_key.rb', line 71

def quoted_primary_key
  @quoted_primary_key ||= connection.quote_column_name(primary_key)
end