ActsAsTaggableOn nil:NilClass 的未定义方法 '[]=' - 创建操作
ActsAsTaggableOn Undefined Method '[]=' for nil:NilClass - Create Action
在此先感谢您的帮助。
下面，在我的 post 底部，我用这个问题的修复更新了它，部分要感谢 Narasimha Reddy。希望它能帮助升级到 Rails 5.2 后遇到类似问题的任何人。更新：ActsAsTaggableOn 6.0 已发布并修复了此问题。
我最近升级到 Rails 5.2，Ruby 2.5，并将我的开发数据库切换到 PostgreSQL（9.3.18，gem：1.0.0）。以前，不会发生此问题，此后仅进行了上述更改。我将 ActsAsTaggableOn (5.0.0) gem 用于使用两个列表的评论表单：love_list 和 improve_list。现在，在提交表单时，我收到以下错误：
NoMethodError in CityReviewsController#create
undefined method `[]=' for nil:NilClass Extracted source (around line 56)
56: @new_city_review = @city.city_reviews.build(city_review_params)
@new_city_review.user_id = current_user.id
Rails.root: /home/ubuntu/mvp1
Application Trace | Framework Trace | Full Trace
acts-as-taggable-on (5.0.0) lib/acts_as_taggable_on/taggable/core.rb:206:in `process_dirty_object'
acts-as-taggable-on (5.0.0) lib/acts_as_taggable_on/taggable/core.rb:184:in `set_tag_list_on'
acts-as-taggable-on (5.0.0) lib/acts_as_taggable_on/taggable/core.rb:45:in `love_list='
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:51:in `public_send'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:51:in `_assign_attribute'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:44:in `block in _assign_attributes'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:43:in `each'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:43:in `_assign_attributes'
activerecord (5.2.0) lib/active_record/attribute_assignment.rb:23:in `_assign_attributes'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:35:in `assign_attributes'
activerecord (5.2.0) lib/active_record/core.rb:314:in `initialize'
activerecord (5.2.0) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.0) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.0) lib/active_record/reflection.rb:154:in `build_association'
activerecord (5.2.0) lib/active_record/associations/association.rb:270:in `build_record'
activerecord (5.2.0) lib/active_record/associations/collection_association.rb:106:in `build'
activerecord (5.2.0) lib/active_record/associations/collection_proxy.rb:319:in `build'
app/controllers/city_reviews_controller.rb:56:in `create'
actionpack (5.2.0) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (5.2.0) lib/abstract_controller/base.rb:194:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.2.0) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (5.2.0) lib/active_support/callbacks.rb:132:in `run_callbacks'
actionpack (5.2.0) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (5.2.0) lib/active_support/notifications.rb:168:in `block in instrument'
activesupport (5.2.0) lib/active_support/notifications/instrumenter.rb:23:in `instrument'
activesupport (5.2.0) lib/active_support/notifications.rb:168:in `instrument'
actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
activerecord (5.2.0) lib/active_record/railties/controller_runtime.rb:24:in `process_action'
actionpack (5.2.0) lib/abstract_controller/base.rb:134:in `process'
actionview (5.2.0) lib/action_view/rendering.rb:32:in `process'
actionpack (5.2.0) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (5.2.0) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:34:in `serve'
actionpack (5.2.0) lib/action_dispatch/journey/router.rb:52:in `block in serve'
actionpack (5.2.0) lib/action_dispatch/journey/router.rb:35:in `each'
actionpack (5.2.0) lib/action_dispatch/journey/router.rb:35:in `serve'
actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:840:in `call'
omniauth (1.8.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.8.1) lib/omniauth/strategy.rb:168:in `call'
warden (1.2.7) lib/warden/manager.rb:36:in `block in call'
warden (1.2.7) lib/warden/manager.rb:35:in `catch'
warden (1.2.7) lib/warden/manager.rb:35:in `call'
rack (2.0.5) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.5) lib/rack/etag.rb:25:in `call'
rack (2.0.5) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.5) lib/rack/head.rb:12:in `call'
actionpack (5.2.0) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.5) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.5) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/cookies.rb:670:in `call'
activerecord (5.2.0) lib/active_record/migration.rb:559:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (5.2.0) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (5.2.0) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/executor.rb:14:in `call'
better_errors (2.4.0) lib/better_errors/middleware.rb:59:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
web-console (3.6.2) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.6.2) lib/web_console/middleware.rb:22:in `block in call'
web-console (3.6.2) lib/web_console/middleware.rb:20:in `catch'
web-console (3.6.2) lib/web_console/middleware.rb:20:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (5.2.0) lib/rails/rack/logger.rb:38:in `call_app'
railties (5.2.0) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (5.2.0) lib/active_support/tagged_logging.rb:71:in `block in tagged'
activesupport (5.2.0) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (5.2.0) lib/active_support/tagged_logging.rb:71:in `tagged'
railties (5.2.0) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
request_store (1.4.1) lib/request_store/middleware.rb:19:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.5) lib/rack/method_override.rb:22:in `call'
rack (2.0.5) lib/rack/runtime.rb:22:in `call'
activesupport (5.2.0) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/static.rb:127:in `call'
rack (2.0.5) lib/rack/sendfile.rb:111:in `call'
railties (5.2.0) lib/rails/engine.rb:524:in `call'
puma (3.11.4) lib/puma/configuration.rb:225:in `call'
puma (3.11.4) lib/puma/server.rb:632:in `handle_request'
puma (3.11.4) lib/puma/server.rb:446:in `process_client'
puma (3.11.4) lib/puma/server.rb:306:in `block in run'
puma (3.11.4) lib/puma/thread_pool.rb:120:in `block in spawn_thread'
Request
Parameters:
{"utf8"=>"✓", "authenticity_token"=>"+KJueLU14yKJPxcTyhPbg0cQFkShT0oYjl9ddJR2pGKSDroJTReEMw7zukg3mpB5Gf3O8HhGYHDbYYqtNoM6Pw==",
"city_review"=>
{"title"=>"Blah Blah Blah",
"score"=>"3",
"love_list"=>"Schools / Education, Night Life, ",
"improve_list"=>"Schools / Education, Taxes, ",
"description"=>
"Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium.\r\n" +
"Proin varius tincidunt purus, congue hendrerit ex interdum sed. Sed interdum, nibh ac lacinia vulputate, neque tellus ultricies nibh, eget vehicula ligula diam sit amet diam. Donec aliquam blandit laoreet. Cras at efficitur est. Phasellus quis enim vitae nisl sodales feugiat non sit amet tellus. Phasellus commodo, risus vitae luctus porta, nulla leo luctus massa, vel tempus odio tellus at nulla. Ut dictum nibh urna, quis scelerisque odio pellentesque ut. Sed at pretium nisi. Maecenas facilisis enim sed molestie gravida."},
"commit"=>"Submit Review",
"city_id"=>"lakewood"}
在我的服务器终端中，我收到一个 500 错误：
"Completed 500 Internal Server Error in 13ms (ActiveRecord: 1.5ms)"
在 Rails 控制台中，我收到同样的错误。我的控制器 post 编辑如下：
class CityReviewsController < ApplicationController
# Main controller for City Reviews
before_action :set_city_review, only: [:show, :edit, :update, :destroy, :upvote]
# Below - Sets City for method actions of City Review.
before_action :set_city, except: [:edit, :update, :destroy]
# Below - Multiples the score value that is initially 1 out of 5 and factors it by 20.
before_action :multiply_score, only: [:create, :update]
# Below - Sets user related params and IDs
before_action :set_user_params, only: [:edit, :update, :destroy]
def show
# Below - adds punch counter to City Review.
@city_review.punch(request)
@city_review_comments = @city_review.comments
end
# GET /city_reviews/new
def new
@new_city_review = CityReview.new
end
# GET /city_reviews/1/edit
def edit
# Calls all user related params and ids from a before action above.
end
def create
# Below - Creates a WUL City Review for the city using the "city_review_params" method in "private" below, passing
# attributes for the :title, :score, :description, :city_review_score_id, :user_id, and :city_id, taggings list (:love_list, :improve_list) and assigning the Review to the city.
@new_city_review = @city.city_reviews.build(city_review_params)
# Below - Sets the user id to the current user posting the city review
@new_city_review.user_id = current_user.id
# Below - Sets the City Review ID to the current users city's ID.
@new_city_review.city_id = current_user.city.id
# Below - Sets the City Review Score Id to the associated city id which should match the City Score ID column.
@new_city_review.city_review_score_id = current_user.city.id
# Begin - If statement for determining if the City Review was committed to the DB successfully, then rendering the City Reviews
# show page with a success message, or displaying an error and rendering a new form page.
if @new_city_review.save # If it saves, display Flash message success, if not move to 'else'
flash[:notice] = "Your What You Love review for #{@city.name} has been successfully posted!" # Shows a Flash message of success
redirect_to city_review_path(@city, @new_city_review) # Redirects to the City Review's show page.
else
flash[:alert] = "Could not post your What You Love review for #{@city.name}. See why below!" # Shows a Flash message of error
render 'new' # Reload the New template with errors
end # End - If statement for review creation.
end
def update
# Calls all user related params and ids from a before action above.
@city_review.user_id = current_user.id
# Below - Sets the City Review ID to the current users city's ID.
@city_review.city_id = current_user.city.id
# Below - Sets the City Review Score Id to the associated city id which should match the City Score ID column.
@city_review.city_review_score_id = current_user.city.id
if @city_review.update(city_review_params)
flash[:notice] = "Your What You Love Review has been updated successfully!"
redirect_to city_review_path(@city, @city_review)
else
flash[:alert] = "Your What You Love Review could not be updated. See why below!"
render 'edit'
end
end
def destroy
# Calls all user related params and ids from a before action above.
if @city_review.user === current_user
if @city_review.destroy
flash[:alert] = "Your What You Love review has been deleted."
redirect_to city_review_index_path(@city)
end
end
end
private
# Below - Finds the City Review ID from the params
def set_city_review
@city_review = CityReview.friendly.find(params[:id])
end
# Below - Sets up the city for City Review
def set_city
@city = City.friendly.find(params[:city_id])
end
def city_review_params
params.require(:city_review).permit(:id, :title, :description, :score, :user_id, :city_id, :city_review_score_id, :love_list, :improve_list)
end
# Below - Sets up user related params on edit, update and destroy.
def set_user_params
@user = User.friendly.find(params[:user_id])
@city_review = CityReview.friendly.find(params[:id])
@city = @city_review.city.friendly_id
@city_review_edit = @city_review
end
# Takes the user submitted Score value (1..1.5..) out of 5, empties the existing params (:score),
# multiplies it by 20 to get a percentage value out of 100, and reassigns the params to the newly
# multiplied value.
def multiply_score
user_score = params[:city_review].delete(:score).to_f
score = user_score * 20
params[:city_review][:score] = score
end
end
我的 ActsAsTaggableOn 相关模型代码：
acts_as_taggable_on :love, :improve
根据 ActsAsTaggableOn gem 建议，我使用了他们的迁移设置 运行ning 命令：
rake acts_as_taggable_on_engine:install:migrations
这就是我的模式查找这些表的方式：
create_table "taggings", id: :serial, force: :cascade do |t|
t.integer "tag_id"
t.string "taggable_type"
t.integer "taggable_id"
t.string "tagger_type"
t.integer "tagger_id"
t.string "context", limit: 128
t.datetime "created_at"
t.index ["context"], name: "index_taggings_on_context"
t.index ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
t.index ["tag_id"], name: "index_taggings_on_tag_id"
t.index ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
t.index ["taggable_id", "taggable_type", "tagger_id", "context"], name: "taggings_idy"
t.index ["taggable_id"], name: "index_taggings_on_taggable_id"
t.index ["taggable_type"], name: "index_taggings_on_taggable_type"
t.index ["tagger_id", "tagger_type"], name: "index_taggings_on_tagger_id_and_tagger_type"
t.index ["tagger_id"], name: "index_taggings_on_tagger_id"
end
create_table "tags", id: :serial, force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
t.index ["name"], name: "index_tags_on_name", unique: true
end
为了解决这个问题，我尝试了很多不同的方法，例如回滚迁移、重新安装 gem、更改列表的名称、使用默认值、在不同的模型上使用它，以及一些不同的控制器动作。此外，在代码中，您还会看到 FriendlyID Gem 的存在。
非常感谢您的阅读和帮助。
*要临时修复 Rails 5.2 中的这个 ActsAsTaggableOn 问题，请使用 Fodoj 中名为 rails-5.2 的分支。在您的 gem 文件中添加 git link 并分支到 acts-as-taggable-on gem 然后 运行 bundle install 并重启你的服务器：*
gem 'acts-as-taggable-on', :git => 'https://github.com/Fodoj/acts-as-taggable-on', :branch => 'rails-5.2'
在此先感谢您的帮助。
下面，在我的 post 底部，我用这个问题的修复更新了它，部分要感谢 Narasimha Reddy。希望它能帮助升级到 Rails 5.2 后遇到类似问题的任何人。更新：ActsAsTaggableOn 6.0 已发布并修复了此问题。
我最近升级到 Rails 5.2，Ruby 2.5，并将我的开发数据库切换到 PostgreSQL（9.3.18，gem：1.0.0）。以前，不会发生此问题，此后仅进行了上述更改。我将 ActsAsTaggableOn (5.0.0) gem 用于使用两个列表的评论表单：love_list 和 improve_list。现在，在提交表单时，我收到以下错误：
NoMethodError in CityReviewsController#create
undefined method `[]=' for nil:NilClass Extracted source (around line 56)
56: @new_city_review = @city.city_reviews.build(city_review_params)
@new_city_review.user_id = current_user.id
Rails.root: /home/ubuntu/mvp1
Application Trace | Framework Trace | Full Trace
acts-as-taggable-on (5.0.0) lib/acts_as_taggable_on/taggable/core.rb:206:in `process_dirty_object'
acts-as-taggable-on (5.0.0) lib/acts_as_taggable_on/taggable/core.rb:184:in `set_tag_list_on'
acts-as-taggable-on (5.0.0) lib/acts_as_taggable_on/taggable/core.rb:45:in `love_list='
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:51:in `public_send'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:51:in `_assign_attribute'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:44:in `block in _assign_attributes'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:43:in `each'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:43:in `_assign_attributes'
activerecord (5.2.0) lib/active_record/attribute_assignment.rb:23:in `_assign_attributes'
activemodel (5.2.0) lib/active_model/attribute_assignment.rb:35:in `assign_attributes'
activerecord (5.2.0) lib/active_record/core.rb:314:in `initialize'
activerecord (5.2.0) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.0) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.0) lib/active_record/reflection.rb:154:in `build_association'
activerecord (5.2.0) lib/active_record/associations/association.rb:270:in `build_record'
activerecord (5.2.0) lib/active_record/associations/collection_association.rb:106:in `build'
activerecord (5.2.0) lib/active_record/associations/collection_proxy.rb:319:in `build'
app/controllers/city_reviews_controller.rb:56:in `create'
actionpack (5.2.0) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (5.2.0) lib/abstract_controller/base.rb:194:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.2.0) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (5.2.0) lib/active_support/callbacks.rb:132:in `run_callbacks'
actionpack (5.2.0) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (5.2.0) lib/active_support/notifications.rb:168:in `block in instrument'
activesupport (5.2.0) lib/active_support/notifications/instrumenter.rb:23:in `instrument'
activesupport (5.2.0) lib/active_support/notifications.rb:168:in `instrument'
actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (5.2.0) lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
activerecord (5.2.0) lib/active_record/railties/controller_runtime.rb:24:in `process_action'
actionpack (5.2.0) lib/abstract_controller/base.rb:134:in `process'
actionview (5.2.0) lib/action_view/rendering.rb:32:in `process'
actionpack (5.2.0) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (5.2.0) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:34:in `serve'
actionpack (5.2.0) lib/action_dispatch/journey/router.rb:52:in `block in serve'
actionpack (5.2.0) lib/action_dispatch/journey/router.rb:35:in `each'
actionpack (5.2.0) lib/action_dispatch/journey/router.rb:35:in `serve'
actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:840:in `call'
omniauth (1.8.1) lib/omniauth/strategy.rb:190:in `call!'
omniauth (1.8.1) lib/omniauth/strategy.rb:168:in `call'
warden (1.2.7) lib/warden/manager.rb:36:in `block in call'
warden (1.2.7) lib/warden/manager.rb:35:in `catch'
warden (1.2.7) lib/warden/manager.rb:35:in `call'
rack (2.0.5) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.5) lib/rack/etag.rb:25:in `call'
rack (2.0.5) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.5) lib/rack/head.rb:12:in `call'
actionpack (5.2.0) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.5) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.5) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/cookies.rb:670:in `call'
activerecord (5.2.0) lib/active_record/migration.rb:559:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (5.2.0) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (5.2.0) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/executor.rb:14:in `call'
better_errors (2.4.0) lib/better_errors/middleware.rb:59:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
web-console (3.6.2) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.6.2) lib/web_console/middleware.rb:22:in `block in call'
web-console (3.6.2) lib/web_console/middleware.rb:20:in `catch'
web-console (3.6.2) lib/web_console/middleware.rb:20:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (5.2.0) lib/rails/rack/logger.rb:38:in `call_app'
railties (5.2.0) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (5.2.0) lib/active_support/tagged_logging.rb:71:in `block in tagged'
activesupport (5.2.0) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (5.2.0) lib/active_support/tagged_logging.rb:71:in `tagged'
railties (5.2.0) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
request_store (1.4.1) lib/request_store/middleware.rb:19:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.5) lib/rack/method_override.rb:22:in `call'
rack (2.0.5) lib/rack/runtime.rb:22:in `call'
activesupport (5.2.0) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.0) lib/action_dispatch/middleware/static.rb:127:in `call'
rack (2.0.5) lib/rack/sendfile.rb:111:in `call'
railties (5.2.0) lib/rails/engine.rb:524:in `call'
puma (3.11.4) lib/puma/configuration.rb:225:in `call'
puma (3.11.4) lib/puma/server.rb:632:in `handle_request'
puma (3.11.4) lib/puma/server.rb:446:in `process_client'
puma (3.11.4) lib/puma/server.rb:306:in `block in run'
puma (3.11.4) lib/puma/thread_pool.rb:120:in `block in spawn_thread'
Request
Parameters:
{"utf8"=>"✓", "authenticity_token"=>"+KJueLU14yKJPxcTyhPbg0cQFkShT0oYjl9ddJR2pGKSDroJTReEMw7zukg3mpB5Gf3O8HhGYHDbYYqtNoM6Pw==",
"city_review"=>
{"title"=>"Blah Blah Blah",
"score"=>"3",
"love_list"=>"Schools / Education, Night Life, ",
"improve_list"=>"Schools / Education, Taxes, ",
"description"=>
"Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium.\r\n" +
"Proin varius tincidunt purus, congue hendrerit ex interdum sed. Sed interdum, nibh ac lacinia vulputate, neque tellus ultricies nibh, eget vehicula ligula diam sit amet diam. Donec aliquam blandit laoreet. Cras at efficitur est. Phasellus quis enim vitae nisl sodales feugiat non sit amet tellus. Phasellus commodo, risus vitae luctus porta, nulla leo luctus massa, vel tempus odio tellus at nulla. Ut dictum nibh urna, quis scelerisque odio pellentesque ut. Sed at pretium nisi. Maecenas facilisis enim sed molestie gravida."},
"commit"=>"Submit Review",
"city_id"=>"lakewood"}
在我的服务器终端中，我收到一个 500 错误：
"Completed 500 Internal Server Error in 13ms (ActiveRecord: 1.5ms)"
在 Rails 控制台中，我收到同样的错误。我的控制器 post 编辑如下：
class CityReviewsController < ApplicationController
# Main controller for City Reviews
before_action :set_city_review, only: [:show, :edit, :update, :destroy, :upvote]
# Below - Sets City for method actions of City Review.
before_action :set_city, except: [:edit, :update, :destroy]
# Below - Multiples the score value that is initially 1 out of 5 and factors it by 20.
before_action :multiply_score, only: [:create, :update]
# Below - Sets user related params and IDs
before_action :set_user_params, only: [:edit, :update, :destroy]
def show
# Below - adds punch counter to City Review.
@city_review.punch(request)
@city_review_comments = @city_review.comments
end
# GET /city_reviews/new
def new
@new_city_review = CityReview.new
end
# GET /city_reviews/1/edit
def edit
# Calls all user related params and ids from a before action above.
end
def create
# Below - Creates a WUL City Review for the city using the "city_review_params" method in "private" below, passing
# attributes for the :title, :score, :description, :city_review_score_id, :user_id, and :city_id, taggings list (:love_list, :improve_list) and assigning the Review to the city.
@new_city_review = @city.city_reviews.build(city_review_params)
# Below - Sets the user id to the current user posting the city review
@new_city_review.user_id = current_user.id
# Below - Sets the City Review ID to the current users city's ID.
@new_city_review.city_id = current_user.city.id
# Below - Sets the City Review Score Id to the associated city id which should match the City Score ID column.
@new_city_review.city_review_score_id = current_user.city.id
# Begin - If statement for determining if the City Review was committed to the DB successfully, then rendering the City Reviews
# show page with a success message, or displaying an error and rendering a new form page.
if @new_city_review.save # If it saves, display Flash message success, if not move to 'else'
flash[:notice] = "Your What You Love review for #{@city.name} has been successfully posted!" # Shows a Flash message of success
redirect_to city_review_path(@city, @new_city_review) # Redirects to the City Review's show page.
else
flash[:alert] = "Could not post your What You Love review for #{@city.name}. See why below!" # Shows a Flash message of error
render 'new' # Reload the New template with errors
end # End - If statement for review creation.
end
def update
# Calls all user related params and ids from a before action above.
@city_review.user_id = current_user.id
# Below - Sets the City Review ID to the current users city's ID.
@city_review.city_id = current_user.city.id
# Below - Sets the City Review Score Id to the associated city id which should match the City Score ID column.
@city_review.city_review_score_id = current_user.city.id
if @city_review.update(city_review_params)
flash[:notice] = "Your What You Love Review has been updated successfully!"
redirect_to city_review_path(@city, @city_review)
else
flash[:alert] = "Your What You Love Review could not be updated. See why below!"
render 'edit'
end
end
def destroy
# Calls all user related params and ids from a before action above.
if @city_review.user === current_user
if @city_review.destroy
flash[:alert] = "Your What You Love review has been deleted."
redirect_to city_review_index_path(@city)
end
end
end
private
# Below - Finds the City Review ID from the params
def set_city_review
@city_review = CityReview.friendly.find(params[:id])
end
# Below - Sets up the city for City Review
def set_city
@city = City.friendly.find(params[:city_id])
end
def city_review_params
params.require(:city_review).permit(:id, :title, :description, :score, :user_id, :city_id, :city_review_score_id, :love_list, :improve_list)
end
# Below - Sets up user related params on edit, update and destroy.
def set_user_params
@user = User.friendly.find(params[:user_id])
@city_review = CityReview.friendly.find(params[:id])
@city = @city_review.city.friendly_id
@city_review_edit = @city_review
end
# Takes the user submitted Score value (1..1.5..) out of 5, empties the existing params (:score),
# multiplies it by 20 to get a percentage value out of 100, and reassigns the params to the newly
# multiplied value.
def multiply_score
user_score = params[:city_review].delete(:score).to_f
score = user_score * 20
params[:city_review][:score] = score
end
end
我的 ActsAsTaggableOn 相关模型代码：
acts_as_taggable_on :love, :improve
根据 ActsAsTaggableOn gem 建议，我使用了他们的迁移设置 运行ning 命令：
rake acts_as_taggable_on_engine:install:migrations
这就是我的模式查找这些表的方式：
create_table "taggings", id: :serial, force: :cascade do |t|
t.integer "tag_id"
t.string "taggable_type"
t.integer "taggable_id"
t.string "tagger_type"
t.integer "tagger_id"
t.string "context", limit: 128
t.datetime "created_at"
t.index ["context"], name: "index_taggings_on_context"
t.index ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
t.index ["tag_id"], name: "index_taggings_on_tag_id"
t.index ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
t.index ["taggable_id", "taggable_type", "tagger_id", "context"], name: "taggings_idy"
t.index ["taggable_id"], name: "index_taggings_on_taggable_id"
t.index ["taggable_type"], name: "index_taggings_on_taggable_type"
t.index ["tagger_id", "tagger_type"], name: "index_taggings_on_tagger_id_and_tagger_type"
t.index ["tagger_id"], name: "index_taggings_on_tagger_id"
end
create_table "tags", id: :serial, force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
t.index ["name"], name: "index_tags_on_name", unique: true
end
为了解决这个问题，我尝试了很多不同的方法，例如回滚迁移、重新安装 gem、更改列表的名称、使用默认值、在不同的模型上使用它，以及一些不同的控制器动作。此外，在代码中，您还会看到 FriendlyID Gem 的存在。
非常感谢您的阅读和帮助。
*要临时修复 Rails 5.2 中的这个 ActsAsTaggableOn 问题，请使用 Fodoj 中名为 rails-5.2 的分支。在您的 gem 文件中添加 git link 并分支到 acts-as-taggable-on gem 然后 运行 bundle install 并重启你的服务器：*
gem 'acts-as-taggable-on', :git => 'https://github.com/Fodoj/acts-as-taggable-on', :branch => 'rails-5.2'