CarrierWave und RMagick: Mit Prozess: resize_and_pad nil werfen ist kein Symbol Fehler

Question

ich ein Bild Uploader erstellt haben und haben die folgende Version innerhalb es

version :profile do 
    process :resize_and_pad [100, 100] 
end 

Wenn ich eine Datei hochladen, erhalte ich die definierte folgende Fehlermeldung:

nil is not a symbol 

bei voller stacktrace Sehen, es kommt aus processing.rb

carrierwave (0.6.1) lib/carrierwave/uploader/processing.rb:85:in `block in process!' 
carrierwave (0.6.1) lib/carrierwave/uploader/processing.rb:81:in `each' 
carrierwave (0.6.1) lib/carrierwave/uploader/processing.rb:81:in `process!' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `block in with_callbacks' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `each' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `with_callbacks' 
carrierwave (0.6.1) lib/carrierwave/uploader/cache.rb:112:in `cache!' 
carrierwave (0.6.1) lib/carrierwave/uploader/versions.rb:230:in `block in cache_versions!' 
carrierwave (0.6.1) lib/carrierwave/uploader/versions.rb:216:in `each' 
carrierwave (0.6.1) lib/carrierwave/uploader/versions.rb:216:in `cache_versions!' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `block in with_callbacks' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `each' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `with_callbacks' 
carrierwave (0.6.1) lib/carrierwave/uploader/cache.rb:112:in `cache!' 
carrierwave (0.6.1) lib/carrierwave/uploader/versions.rb:230:in `block in cache_versions!' 
carrierwave (0.6.1) lib/carrierwave/uploader/versions.rb:216:in `each' 
carrierwave (0.6.1) lib/carrierwave/uploader/versions.rb:216:in `cache_versions!' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `block in with_callbacks' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `each' 
carrierwave (0.6.1) lib/carrierwave/uploader/callbacks.rb:18:in `with_callbacks' 
carrierwave (0.6.1) lib/carrierwave/uploader/cache.rb:112:in `cache!' 
carrierwave (0.6.1) lib/carrierwave/mount.rb:315:in `cache' 
carrierwave (0.6.1) lib/carrierwave/mount.rb:173:in `profile_image=' 
carrierwave (0.6.1) lib/carrierwave/orm/activerecord.rb:37:in `profile_image=' 
activerecord (3.2.2) lib/active_record/attribute_assignment.rb:85:in `block in assign_attributes' 
activerecord (3.2.2) lib/active_record/attribute_assignment.rb:78:in `each' 
activerecord (3.2.2) lib/active_record/attribute_assignment.rb:78:in `assign_attributes' 
activerecord (3.2.2) lib/active_record/persistence.rb:212:in `block in update_attributes' 
activerecord (3.2.2) lib/active_record/transactions.rb:295:in `block in with_transaction_returning_status' 
activerecord (3.2.2) lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction' 
activerecord (3.2.2) lib/active_record/transactions.rb:208:in `transaction' 
activerecord (3.2.2) lib/active_record/transactions.rb:293:in `with_transaction_returning_status' 
activerecord (3.2.2) lib/active_record/persistence.rb:211:in `update_attributes' 
app/controllers/users_controller.rb:24:in `update_profile' 

Answer 1

Ich denke, es ist wegen der fehlenden Argumente, versuchen

process :resize_and_pad => [120, 120, "blue", "Center"]

Answer 2

ich nicht eine einfache Zeichenfolge für die gravityType, versuchen Sie dies nutzen könnten:

process :resize_and_pad => [100, 100, "white", Magick::CenterGravity] 

http://rmagick.rubyforge.org/src_over.html

Answer 3

Sie können Verwenden Sie auch einen Hex-Code, aber Sie brauchen die Octothorp.

process :resize_and_pad => [1000,1000,"#222222", Magick::CenterGravity]