I am able to edit multiple rows of data in one form using ‘object[]’
like here:
http://jgchristopher.blogspot.com/2005/09/ruby-on-rails-editing-multiple-rows-of.html
The problem appears when I want to edit old values and I want to add new
values, all in the same form.
This is the field when the object exists:
This is the blank field waiting to be filled out.
These two approaches work good, separately. In the same form they don’t
work.
When I give the “mixed bowl” Rails dies with a server error 500 and
gives this message:
Conflicting types for parameter containers. Expected an instance of
Hash, but found an instance of Array. This can be caused by passing
Array and Hash based paramters qs[]=value&qs[key]=value.
It makes sense… some extra_charges_customer have indexes, some not.
The solution? Should I number the new values with a magic value (say
-1)? Should I have a new array for the new values, say
extra_charges_customer_new[] ? What should be the most elegant approach
in this case?