当前我们的项目正在开发中，但是当使用RAILS_ENV=production运行时，我无法运行该项目：
coolGuy@coolGuy-home:~/repos/raamble_on-project6-beta$ RAILS_ENV=production rails server
=> Booting Puma
=> Rails 6.0.2.2 application starting in production
=> Run `rails server --help` for more startup options
Exiting
Traceback (most recent call last):
91: from bin/rails:4:in `<main>'
90: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `require'
89: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:291:in `load_dependency'
88: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `block in require'
87: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
86: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
85: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
84: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
83: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
82: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands.rb:18:in `<main>'
81: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/command.rb:46:in `invoke'
80: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/command/base.rb:69:in `perform'
79: from /home/ray/.rvm/gems/ruby-2.6.5/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
78: from /home/ray/.rvm/gems/ruby-2.6.5/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
77: from /home/ray/.rvm/gems/ruby-2.6.5/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
76: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:138:in `perform'
75: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:138:in `tap'
74: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:147:in `block in perform'
73: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:39:in `start'
72: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:311:in `start'
71: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:379:in `handle_profiling'
70: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:312:in `block in start'
69: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:422:in `wrapped_app'
68: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:249:in `app'
67: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:349:in `build_app_and_options_from_config'
66: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:66:in `parse_file'
65: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:105:in `load_file'
64: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:116:in `new_from_string'
63: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:116:in `eval'
62: from config.ru:3:in `block in <main>'
61: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:49:in `require_relative'
60: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `require'
59: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:291:in `load_dependency'
58: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `block in require'
57: from /home/ray/.rvm/gems/ruby-2.6.5/gems/zeitwerk-2.3.0/lib/zeitwerk/kernel.rb:23:in `require'
56: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
55: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
54: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
53: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
52: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
51: from /home/ray/repos/raamble_on-project6-beta/config/environment.rb:5:in `<main>'
50: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/application.rb:363:in `initialize!'
49: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:60:in `run_initializers'
48: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
47: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
46: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
45: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `call'
44: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `each'
43: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
42: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
41: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
40: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
39: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:61:in `block in run_initializers'
38: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:32:in `run'
37: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:32:in `instance_exec'
36: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/application/finisher.rb:129:in `block in <module:Finisher>'
35: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
34: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:51:in `each'
33: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
32: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook'
31: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control'
30: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
29: from /home/ray/repos/raamble_on-project6-beta/config/application.rb:52:in `block in <class:Application>'
28: from /home/ray/repos/raamble_on-project6-beta/config/application.rb:52:in `each'
27: from /home/ray/repos/raamble_on-project6-beta/config/application.rb:113:in `block (2 levels) in <class:Application>'
26: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:18:in `method_missing'
25: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:60:in `valid?'
24: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:60:in `all?'
23: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:60:in `block in valid?'
22: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:352:in `columns_hash'
21: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:477:in `load_schema'
20: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
19: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:480:in `block in load_schema'
18: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/attribute_decorators.rb:51:in `load_schema!'
17: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/attributes.rb:247:in `load_schema!'
16: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:490:in `load_schema!'
15: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/schema_cache.rb:82:in `columns_hash'
14: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/schema_cache.rb:76:in `columns'
13: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract/schema_statements.rb:114:in `columns'
12: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql_adapter.rb:817:in `column_definitions'
11: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:63:in `query'
10: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:708:in `log'
9: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
8: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:717:in `block in log'
7: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
6: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:718:in `block (2 levels) in log'
5: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:64:in `block in query'
4: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies/interlock.rb:47:in `permit_concurrent_loads'
3: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/concurrency/share_lock.rb:187:in `yield_shares'
2: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies/interlock.rb:48:in `block in permit_concurrent_loads'
1: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:65:in `block (2 levels) in query'
/home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:65:in `exec': ERROR: relation "courses" does not exist (PG::UndefinedTable)
LINE 8: WHERE a.attrelid = '"courses"'::regclass
^
91: from bin/rails:4:in `<main>'
90: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `require'
89: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:291:in `load_dependency'
88: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `block in require'
87: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
86: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
85: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
84: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
83: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
82: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands.rb:18:in `<main>'
81: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/command.rb:46:in `invoke'
80: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/command/base.rb:69:in `perform'
79: from /home/ray/.rvm/gems/ruby-2.6.5/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
78: from /home/ray/.rvm/gems/ruby-2.6.5/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
77: from /home/ray/.rvm/gems/ruby-2.6.5/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
76: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:138:in `perform'
75: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:138:in `tap'
74: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:147:in `block in perform'
73: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/commands/server/server_command.rb:39:in `start'
72: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:311:in `start'
71: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:379:in `handle_profiling'
70: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:312:in `block in start'
69: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:422:in `wrapped_app'
68: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:249:in `app'
67: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/server.rb:349:in `build_app_and_options_from_config'
66: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:66:in `parse_file'
65: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:105:in `load_file'
64: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:116:in `new_from_string'
63: from /home/ray/.rvm/gems/ruby-2.6.5/gems/rack-2.2.2/lib/rack/builder.rb:116:in `eval'
62: from config.ru:3:in `block in <main>'
61: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:49:in `require_relative'
60: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `require'
59: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:291:in `load_dependency'
58: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies.rb:325:in `block in require'
57: from /home/ray/.rvm/gems/ruby-2.6.5/gems/zeitwerk-2.3.0/lib/zeitwerk/kernel.rb:23:in `require'
56: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
55: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
54: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
53: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
52: from /home/ray/.rvm/gems/ruby-2.6.5/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
51: from /home/ray/repos/raamble_on-project6-beta/config/environment.rb:5:in `<main>'
50: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/application.rb:363:in `initialize!'
49: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:60:in `run_initializers'
48: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
47: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
46: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
45: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `call'
44: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:347:in `each'
43: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
42: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
41: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
40: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
39: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:61:in `block in run_initializers'
38: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:32:in `run'
37: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/initializable.rb:32:in `instance_exec'
36: from /home/ray/.rvm/gems/ruby-2.6.5/gems/railties-6.0.2.2/lib/rails/application/finisher.rb:129:in `block in <module:Finisher>'
35: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
34: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:51:in `each'
33: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
32: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook'
31: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control'
30: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
29: from /home/ray/repos/raamble_on-project6-beta/config/application.rb:52:in `block in <class:Application>'
28: from /home/ray/repos/raamble_on-project6-beta/config/application.rb:52:in `each'
27: from /home/ray/repos/raamble_on-project6-beta/config/application.rb:113:in `block (2 levels) in <class:Application>'
26: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:18:in `method_missing'
25: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:60:in `valid?'
24: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:60:in `all?'
23: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/dynamic_matchers.rb:60:in `block in valid?'
22: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:352:in `columns_hash'
21: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:477:in `load_schema'
20: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
19: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:480:in `block in load_schema'
18: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/attribute_decorators.rb:51:in `load_schema!'
17: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/attributes.rb:247:in `load_schema!'
16: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/model_schema.rb:490:in `load_schema!'
15: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/schema_cache.rb:82:in `columns_hash'
14: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/schema_cache.rb:76:in `columns'
13: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract/schema_statements.rb:114:in `columns'
12: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql_adapter.rb:817:in `column_definitions'
11: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:63:in `query'
10: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:708:in `log'
9: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
8: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:717:in `block in log'
7: from /home/ray/.rbenv/versions/2.6.3/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
6: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:718:in `block (2 levels) in log'
5: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:64:in `block in query'
4: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies/interlock.rb:47:in `permit_concurrent_loads'
3: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/concurrency/share_lock.rb:187:in `yield_shares'
2: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activesupport-6.0.2.2/lib/active_support/dependencies/interlock.rb:48:in `block in permit_concurrent_loads'
1: from /home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:65:in `block (2 levels) in query'
/home/ray/.rvm/gems/ruby-2.6.5/gems/activerecord-6.0.2.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:65:in `exec': PG::UndefinedTable: ERROR: relation "courses" does not exist (ActiveRecord::StatementInvalid)
LINE 8: WHERE a.attrelid = '"courses"'::regclass
此错误未出现在开发中。该表较早存在一个问题，我的团队成员删除了一些迁移，为此表创建了一个迁移，并为此表创建了一个列，但是，在进行一些修补后，我得以使其再次在开发环境中工作。
我也尝试使用SQLite作为数据库而不是PostgreSQL，但是我仍然没有运气。
如何修复生产？
答案 0 :(得分：2)
如果schema.rb是数据库架构的有效版本，则可以使用它代替生产中的迁移。
RAILS_ENV=production rake db:schema:load
将db / schema.rb中已经生成的模式加载到数据库中。
您可能需要首先创建或删除/创建生产数据库。如果我理解正确，那么那里还没有真实数据。
RAILS_ENV=production rake db:drop
RAILS_ENV=production rake db:create