NoMethodError: undefinierte Methode `detect 'für false: FalseClass

Question

Ich versuche ein Objekt zu erstellen, aber ich bekomme einen wirklich seltsamen Fehler, von dem ich nicht sicher bin, woher er kommt oder wie er debuggt.

PushNotification.new(user_id: 7, notification_type: 'foo')

NoMethodError: undefined method `detect' for false:FalseClass 
from /usr/local/bundle/gems/activemodel-4.2.3/lib/active_model/attribute_methods.rb:471:in `match_attribute_method?' 
from /usr/local/bundle/gems/activemodel-4.2.3/lib/active_model/attribute_methods.rb:457:in `respond_to?' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/attribute_methods.rb:236:in `respond_to?' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/attribute_assignment.rb:56:in `rescue in _assign_attribute' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/attribute_assignment.rb:54:in `_assign_attribute' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/attribute_assignment.rb:41:in `block in assign_attributes' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/attribute_assignment.rb:35:in `each' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/attribute_assignment.rb:35:in `assign_attributes' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/core.rb:564:in `init_attributes' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/core.rb:281:in `initialize' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/inheritance.rb:61:in `new' 
from /usr/local/bundle/gems/activerecord-4.2.3/lib/active_record/inheritance.rb:61:in `new' 
from (irb):58 
from /usr/local/bundle/gems/railties-4.2.3/lib/rails/commands/console.rb:110:in `start' 
from /usr/local/bundle/gems/railties-4.2.3/lib/rails/commands/console.rb:9:in `start' 
from /usr/local/bundle/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:68:in `console' 
from /usr/local/bundle/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:39:in `run_command!' 
from /usr/local/bundle/gems/railties-4.2.3/lib/rails/commands.rb:17:in `<top (required)>' 
from bin/rails:4:in `require' 

Mein Schema ist wie folgt:

create_table "push_notifications", force: :cascade do |t| 
    t.integer "user_id",   limit: 4, null: false 
    t.string "notification_type", limit: 191, null: false 
    t.datetime "created_at",     null: false 
    t.datetime "updated_at",     null: false 
end 

Irgendwelche Ideen, wo dies kommen könnte?

Answer 1

Ich habe versehentlich ein reserviertes Wort als Funktionsname verwendet, der diesen Fehler ausgelöst hat.

anderen Menschen zu helfen, die in diese laufen könnten:

http://www.rubymagic.org/posts/ruby-and-rails-reserved-words