I'm having troubles handling objects that not respect the validation. I'm building an app in which an user can create a "Trip" model and then add steps to his trip, that I called "Traces". Each added trace prints a new part of a map present in the trip#show action. The association between models is user has_many trips and trip has_many traces
In the users#show I put a "CREATE NEW TRIP" button linking to the trips#new and here I have the form_for with the field corresponding to the Trip attributes. When I fill the form correctly everything is ok. When something is missing or wrong (for the validations) I get this error:
NoMethodError in Trips#create
undefined method `model_name' for Array:Class
------ in the trips_controller.rb
def create
@trip = current_user.trips.build(params[:trip])
if @trip.save
# handle a successful save
flash[:success] = 'Trip created!'
redirect_to user_trip_path(@trip, user_id: current_user.id)
else
@trip = []
@feed_items = []
render 'new'
end
end
------ in app/views/trip, in the new.html.erb
h1>Create a trip</h1>
<div class="row">
<div class="col-md-6 col-md-offset-3 general-input">
<%= form_for ([current_user, @trip]) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= f.label :name,'Give a name to your trip ;)' %>
<%= f.text_field :name %>
<%= f.label :trip_start, 'Choose your starting point!' %>
<%= f.text_field :trip_start %>
<%= f.label :departure, 'When are you leaving?' %>
<%= f.date_select :departure, :start_year => Date.current.year %>
<%= f.label :arrive, 'And coming back home?' %>
<%= f.date_select :arrive, :start_year => Date.current.year %>
<%= f.submit 'Create a new trip', class: 'btn btn-primary btn-lg' %>
<% end %>
EDIT 1: problem solving removing @trace=[ ] from trips_controller.rb
EDIT 2:
I also have a similar problem with the creation of a new Trace:
The form for adding a new trace is in the trip#show page. When I try to create a trace that not respects the validation (e.g. if I leave blank the "destination" field) I get this error:
NoMethodError in Posts#create
undefined method `any?' for nil:NilClass
When I'm on the Trip page where the form for the Traces is placed, the URL is like:
http://localhost:3000/users/2/trips/8
but when I create a not valide Trace it switchs to a path like:
http://localhost:3000/trips/8/posts
I suppose I'm doing something wrong handling the error messages. I probably misunderstood something, even because I'm new to Rails and web programming in general.
Here you are some code parts, hoping it helps to understand my mistake:
------ in the traces_controller.rb
def create
@trip= Trip.find(params[:trip_id])
@trace = @trip.traces.create(params[:trace])
if @trace.save
flash[:success] = 'Trace created!'
redirect_to user_trip_path(@trip, user_id: current_user.id)
else
@trace=[]
render 'trips/show'
end
end
------ in app/views/shared, in the add_trace_form.html.erb
<p>Complete your trip adding a route!</p>
<%= form_for ([@trip, @trip.traces.build]) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<div class="block post-form">
<div class="field ">
<%= f.text_field :end, placeholder: 'Where are you going next?' %>
<%= f.label :arr_day, 'When?' %>
<%= f.date_select :arr_day, :start_year => Date.current.year %>
<%= f.submit 'Add route', class: 'btn btn-primary btn-landing' %>
</div>
</div>
<% end %>
------ in app/views/shared, in the error_messages.html.erb
<% if object.errors.any? %>
<div id="error_explanation">
<div class="alert alert-error">
The form contains <%= pluralize(object.errors.count, "error") %>.
</div>
<ul>
<% object.errors.full_messages.each do |message| %>
<li>* <%= message %></li>
<% end %>
</ul>
</div>
<% end %>
------ in the routes.rb
resources :users do
resources :trips
end
resources :trips do
resources :traces
end
resources :traces
Thanks a lot
