class
ActiveRecord::MultiparameterAssignmentErrors
v8.0.0 -
Show latest stable
- Superclass: ActiveRecordError
Raised when there are multiple errors while doing a mass assignment through the {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] method. The exception has an errors property that contains an array of AttributeAssignmentError objects, each corresponding to the error while assigning to an attribute.
Attributes
| [R] | errors |
Files
- activerecord/lib/active_record/errors.rb
2Notes
How to handle the MultiparameterAssignmentErrors exception
If you expect to get this error, do this in your controller:
def create
@event = Event.new
@event.attributes = params[:event]
@event.save!
rescue ActiveRecord::MultiparameterAssignmentErrors => e
e.errors.each do |error|
@event.errors.add(error.attribute, ActiveRecord::Errors.default_error_messages[:invalid])
end
rescue ActiveRecord::RecordInvalid
# event is invalid
ensure
if @event.errors.empty? and not @event.new_record?
redirect_to event_path(@event)
else
render :action => :new
end
end
If attribute assignment gives the +MultiparameterAssignmentErrors+ exception we handle it by adding 'invalid' errors to the attributes involved. We also rescue the +RecordInvalid+ exception and handle all the redirecting/rendering in the ensure block.
Alternative Way to Handle
This plugin may also help solve the problem from the model side.
http://github.com/rxcfc/multi_assignment_sanity