Class: LowCardTables::VersionSupport

Inherits:
Object
  • Object
show all
Defined in:
lib/low_card_tables/version_support.rb

Overview

Contains methods used by the codebase to support differing ActiveRecord versions. This is just a clean way of factoring out differing ActiveRecord API into a single class.

Class Method Summary collapse

Class Method Details

.clear_schema_cache!(model) ⇒ Object

Clear the schema cache for a given model.



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# File 'lib/low_card_tables/version_support.rb', line 7

def clear_schema_cache!(model)
  if model.connection.respond_to?(:schema_cache)
    model.connection.schema_cache.clear!
  elsif model.connection.respond_to?(:clear_cache!)
    model.connection.clear_cache!
  end
end

.default_scopes_accept_a_block? ⇒ Boolean

Can you specify a block on default_scope? This was added in ActiveRecord 3.1.

Returns:

  • (Boolean) 


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# File 'lib/low_card_tables/version_support.rb', line 16

def default_scopes_accept_a_block?
  ! (::ActiveRecord::VERSION::MAJOR <= 3 && ::ActiveRecord::VERSION::MINOR == 0)
end

.define_default_scope(klass, conditions) ⇒ Object

Define a default scope on the class in question. This is only actually used from our specs.



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# File 'lib/low_card_tables/version_support.rb', line 27

def define_default_scope(klass, conditions)
  if default_scopes_accept_a_block?
    if conditions
      klass.instance_eval %{
    default_scope { where(#{conditions.inspect}) }
}
    else
      klass.instance_eval %{
    default_scope { }
}
    end
  else
    if conditions
      klass.instance_eval %{
    default_scope where(#{conditions.inspect})
}
    else
      klass.instance_eval %{
    default_scope nil
}
    end
  end
end

.migrate_is_a_class_method? ⇒ Boolean

Is #migrate a class method, or an instance method, on ActiveRecord::Migration? It changed to an instance method as of ActiveRecord 3.1.

Returns:

  • (Boolean) 


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# File 'lib/low_card_tables/version_support.rb', line 22

def migrate_is_a_class_method?
  (::ActiveRecord::VERSION::MAJOR <= 3 && ::ActiveRecord::VERSION::MINOR == 0)
end