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# This module provides all the column helper methods to deal with the
# values and adds the common type management code for the adapters.
module ActiveRecordEnumerations
module Column
# Add the values accessor to the column class.
def self.included(klass)
klass.module_eval <<-EOE
def values; @limit; end
EOE
end
# Add the type to the native database types. This will most
# likely need to be modified in the adapter as well.
def native_database_types
types = super
types[:enum] = { :name => "enum" }
types
end
# The new constructor with a values argument.
def initialize(name, default, sql_type = nil, null = true, values = nil)
super(name, default, sql_type, null)
@limit = values if type == :enum
end
# The class for enum is Symbol.
def klass
if type == :enum
Symbol
else
super
end
end
# Convert to a symbol.
def type_cast(value)
return nil if value.nil?
if type == :enum
ActiveRecordEnumerations::Column.value_to_symbol(value)
else
super
end
end
# Code to convert to a symbol.
def type_cast_code(var_name)
if type == :enum
"ActiveRecordEnumerations::Column.value_to_symbol(#{var_name})"
else
super
end
end
# The enum simple type.
def simplified_type(field_type)
if field_type =~ /enum/i
:enum
else
super
end
end
# Safely convert the value to a symbol.
def self.value_to_symbol(value)
case value
when Symbol
value
when String
value.empty? ? nil : value.intern
else
nil
end
end
end
end
Version data entries
11 entries across 11 versions & 3 rubygems