def call(target)
scope = Array(@options[:scope])
return true if @options[:allow_nil] && target.send(field_name).nil?
repository_name = target.repository.name
opts = {
:fields => target.model.key,
field_name => target.validation_property_value(field_name)
}
scope.each do |item|
if target.model.properties(repository_name).has_property?(item)
opts[item] = target.validation_property_value(item)
elsif target.model.relationships(repository_name).has_key?(item)
target.validation_association_keys(item).each do |key|
opts[key] = target.validation_property_value(key)
end
end
end
resource = repository(repository_name) { target.model.first(opts) }
return true if resource.nil?
return true if !target.new_record? && resource.repository.name == repository_name && resource.model == target.model && resource.key == target.key
error_message = @options[:message] || ValidationErrors.default_error_message(:taken, field_name)
add_error(target, error_message, field_name)
return false
end