ActiveRecord :: StatementInvalid：找不到表
我运行rake db：migrate，schema.rb看起来正确，当我在rails dbconsole中运行.tables时，我可以看到我正在寻找的表。 我以前做过回滚，但最后我运行了rake db：reset。 还有其他想法吗？
Rails 4，Ruby 1.9.3
schema.rb：
`ActiveRecord::Schema.define(version: 20130501043644) do create_table "playlists", force: true do |t| t.string "name" t.datetime "created_at" t.datetime "updated_at" end create_table "songs", force: true do |t| t.string "name" t.string "artist" t.string "soundcloud" t.datetime "created_at" t.datetime "updated_at" end create_table "songs_playlists", id: false, force: true do |t| t.integer "song_id" t.integer "playlist_id" end end` 跟踪来自运行rake db：seed –trace
`Could not find table 'playlists_songs' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb:509:in `table_structure' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb:396:in `columns' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:114:in `block in prepare_default_proc' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:56:in `yield' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:56:in `default' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:56:in `columns' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:118:in `block in prepare_default_proc' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:67:in `yield' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:67:in `default' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/connection_adapters/schema_cache.rb:67:in `columns_hash' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:25:in `column_for' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:37:in `bind' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:73:in `block in add_constraints' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:44:in `each' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:44:in `each_with_index' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:44:in `add_constraints' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association_scope.rb:19:in `scope' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association.rb:100:in `association_scope' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/association.rb:84:in `scope' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/collection_association.rb:382:in `scope' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/collection_proxy.rb:37:in `initialize' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/relation/delegation.rb:78:in `new' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/collection_association.rb:37:in `reader' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/associations/builder/association.rb:70:in `songs' /Users/paulruescher/Desktop/Dropbox/gtfomp/db/seeds.rb:11:in `' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activesupport/lib/active_support/dependencies.rb:222:in `load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activesupport/lib/active_support/dependencies.rb:222:in `block in load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activesupport/lib/active_support/dependencies.rb:213:in `load_dependency' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activesupport/lib/active_support/dependencies.rb:222:in `load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/railties/lib/rails/engine.rb:540:in `load_seed' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/tasks/database_tasks.rb:161:in `load_seed' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bundler/gems/rails-78db16d440c6/activerecord/lib/active_record/railties/databases.rake:181:in `block (2 levels) in ' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:246:in `call' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:241:in `each' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain' /Users/paulruescher/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_level' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:101:in `each' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:70:in `run' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/bin/rake:33:in `' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bin/rake:23:in `load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bin/rake:23:in `' Rails 3.2.12 rake db:seed --trace SQLite3::SQLException: no such table: playlists_songs: INSERT INTO "playlists_songs" ("song_id", "playlist_id") VALUES (5, 5) /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/sqlite3-1.3.7/lib/sqlite3/database.rb:91:in `initialize' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/sqlite3-1.3.7/lib/sqlite3/database.rb:91:in `new' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/sqlite3-1.3.7/lib/sqlite3/database.rb:91:in `prepare' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/sqlite_adapter.rb:246:in `block in exec_query' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activesupport-3.2.12/lib/active_support/notifications/instrumenter.rb:20:in `instrument' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/sqlite_adapter.rb:242:in `exec_query' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/database_statements.rb:63:in `exec_insert' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/database_statements.rb:90:in `insert' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/query_cache.rb:14:in `insert' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/has_and_belongs_to_many_association.rb:29:in `insert_record' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:496:in `block (2 levels) in concat_records' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:344:in `add_to_target' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:495:in `block in concat_records' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:493:in `each' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:493:in `concat_records' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:134:in `block in concat' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:149:in `block in transaction' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/transactions.rb:208:in `transaction' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:148:in `transaction' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_association.rb:134:in `concat' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/associations/collection_proxy.rb:116:in `<<' /Users/paulruescher/Desktop/Dropbox/fomp/db/seeds.rb:11:in `' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:245:in `load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:245:in `block in load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in `load_dependency' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:245:in `load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/railties-3.2.12/lib/rails/engine.rb:520:in `load_seed' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:333:in `block (2 levels) in ' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:246:in `call' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:241:in `each' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain' /Users/paulruescher/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_level' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:101:in `each' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/lib/rake/application.rb:70:in `run' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/gems/rake-10.0.4/bin/rake:33:in `' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bin/rake:23:in `load' /Users/paulruescher/.rvm/gems/ruby-1.9.3-p286/bin/rake:23:in `'`
在您的架构中，您有songs_playlists，但在您的模型中，您正在寻找播放列表