Better error messages

app/controllers/data_controller.rb

@@ -62,8 +62,8 @@ class DataController < ApplicationController
         flash[:notice] = t 'data.import.projects_count', count: count
       when 'todos'
         count = Todo.import path_and_file, params, current_user
-        if not count
-          flash[:error] = t('data.import.errors.invalid_destination')
+        if ! count
+          flash[:error] = t('data.import.errors.no_context')
         else
           flash[:notice] = t 'data.import.todos_count', count: count
         end

app/models/todo.rb

@@ -353,10 +353,7 @@ class Todo < ApplicationRecord
 
   def self.import(filename, params, user)
     default_context = user.contexts.order('id').first
-    if default_context.nil?
-      logger.error "No available contexts in import"
-      return FALSE
-    end
+    return false if default_context.nil?
 
     count = 0
     CSV.foreach(filename, headers: true) do |row|

config/locales/en.yml

@@ -207,6 +207,7 @@ en:
         invalid_csv: "Invalid CSV: could not read headers: %{e}"
         save_error: "Could not save uploaded CSV (%{path_and_file}). Can Tracks write\
           \ to the upload directory? %{e}"
+        no_context: No default context could be found
       map_title: Map fields to be imported
       header: Importing data
       submit: Import