Wednesday, June 29, 2016
Every time you call render or redirect instance disappear from memory, here is how it work: a resquest comes in, the router figures out the controller and action to use and you load/save data, then present it by rendering the view, after this point, the server will wipe out the memory used for that request, so, when you loaded the index, and rendered the index, it was over for the live of that instance, then, the user clicks new, and a new instance is created but with empty attributes, then is used to create the form and passes to the view, after that is wiped from memory. now the form that is created has the data in html and the user insert more data, when the user click submit the server will take those parameters (params) and used it inside Appoinment.new(params) to create a new instance with the attributes that come in the post request of the form, at this point @appointments does not exists, if you try to do anything with its value is nil.
About the end, its could be that a 'do' is missing a 'else' is incorrect, or a missed an 'end' somewhere.
On Wed, Jun 29, 2016 at 4:39 PM, Ruth Stephenson <lists@ruby-forum.com> wrote:
Than you so much for your reply and your help! I'm still a little
confused however as I'm still getting an error:
syntax error, unexpected end-of-input, expecting keyword_end
I don't know why it's complaining about end keywords. As far as I can
tell they are ok.
I don't understand what you mean when you say:
"# @appointments has not been loaded, is nil, you will get an error
here
# you can add a before_action filter and load it there
@appointments.find(params[:date, :timeslot]) # dont load this here
since is not always needed"
Isn't the @appointments.find(params[:date, :timeslot]) not instanciated
in the index method above?
Do you mean to put a before_action filter in the appointments
controller?
appointments controller:
def create
@appointment = Appointment.new(appointment_params)
respond_to do |format|
unless @appointments.isValid?
if @appointment.save
format.html { redirect_to @appointment, notice: 'Appointment
was successfully created.' }
format.json { render :show, status: :created, location:
@appointment }
elsif
format.html { render :new }
format.json { render json: @appointment.errors, status:
:unprocessable_entity }
else
redirect_to root_path
end
end
end
appointments Model:
class Appointment < ActiveRecord::Base
def isValid?
date.present? && timeslot.present?
end
end
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