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Contents
module CanCan
module ModelAdapters
class AbstractAdapter
def self.inherited(subclass)
@subclasses ||= []
@subclasses << subclass
end
def self.adapter_class(model_class)
@subclasses.detect { |subclass| subclass.for_class?(model_class) } || DefaultAdapter
end
# Used to determine if the given adapter should be used for the passed in class.
def self.for_class?(member_class)
false # override in subclass
end
# Used to determine if this model adapter will override the matching behavior for a hash of conditions.
# If this returns true then matches_conditions_hash? will be called. See Rule#matches_conditions_hash
def self.override_conditions_hash_matching?(subject, conditions)
false
end
# Override if override_conditions_hash_matching? returns true
def self.matches_conditions_hash?(subject, conditions)
raise NotImplemented, "This model adapter does not support matching on a conditions hash."
end
# Used to determine if this model adapter will override the matching behavior for a specific condition.
# If this returns true then matches_condition? will be called. See Rule#matches_conditions_hash
def self.override_condition_matching?(subject, name, value)
false
end
# Override if override_condition_matching? returns true
def self.matches_condition?(subject, name, value)
raise NotImplemented, "This model adapter does not support matching on a specific condition."
end
def initialize(model_class, rules)
@model_class = model_class
@rules = rules
end
def database_records
# This should be overridden in a subclass to return records which match @rules
raise NotImplemented, "This model adapter does not support fetching records from the database."
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems