Linux 无法运行rake db:migrate，关系不存在

我正在尝试让一个工作应用程序在运行于vagrant的linux 10.04上工作

我安装了所有相关的gems，安装了postgresql9.1.9，并且在尝试运行时

rakedb:migrate

我得到

rake aborted!
PG::Error: ERROR:  relation "messages" does not exist
LINE 5:              WHERE a.attrelid = '"messages"'::regclass
                                        ^
:             SELECT a.attname, format_type(a.atttypid, a.atttypmod),
                     pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod
              FROM pg_attribute a LEFT JOIN pg_attrdef d
                ON a.attrelid = d.adrelid AND a.attnum = d.adnum
             WHERE a.attrelid = '"messages"'::regclass
               AND a.attnum > 0 AND NOT a.attisdropped
             ORDER BY a.attnum
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1161:in `exec'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1161:in `exec_no_cache'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:660:in `block in exec_query'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/rack-mini-profiler-0.1.26/Ruby/lib/patches/sql_patches.rb:246:in `log_with_miniprofiler'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/newrelic_rpm-3.6.0.83/lib/new_relic/agent/instrumentation/active_record.rb:36:in `block in log_with_newrelic_instrumentation'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/newrelic_rpm-3.6.0.83/lib/new_relic/agent/method_tracer.rb:235:in `trace_execution_scoped'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/newrelic_rpm-3.6.0.83/lib/new_relic/agent/instrumentation/active_record.rb:33:in `log_with_newrelic_instrumentation'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:659:in `exec_query'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1286:in `column_definitions'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:855:in `columns'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/connection_adapters/schema_cache.rb:12:in `block in initialize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:228:in `yield'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:228:in `default'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:228:in `columns'

/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/model_schema.rb:237:in `columns_hash'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/inheritance.rb:19:in `descends_from_active_record?'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/inheritance.rb:25:in `finder_needs_type_condition?'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/base.rb:455:in `relation'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/scoping/named.rb:37:in `scoped'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activerecord-3.2.13/lib/active_record/querying.rb:9:in `where'
/home/vagrant/myapp/app/models/message.rb:29:in `<class:Message>'
/home/vagrant/myapp/app/models/message.rb:25:in `<top (required)>'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:469:in `load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:469:in `block in load_file'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:639:in `new_constants_in'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:468:in `load_file'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:353:in `require_or_load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:502:in `load_missing_constant'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:192:in `block in const_missing'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in `const_missing'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:230:in `block in constantize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:229:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:229:in `constantize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/core_ext/string/inflections.rb:54:in `constantize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/acts-as-messageable-0.4.8/lib/acts-as-messageable/model.rb:34:in `acts_as_messageable'
/home/vagrant/myapp/app/models/user.rb:123:in `<class:User>'
/home/vagrant/myapp/app/models/user.rb:45:in `<top (required)>'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:469:in `load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:469:in `block in load_file'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:639:in `new_constants_in'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:468:in `load_file'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:353:in `require_or_load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:502:in `load_missing_constant'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:192:in `block in const_missing'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:190:in `const_missing'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:230:in `block in constantize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:229:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/inflector/methods.rb:229:in `constantize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:554:in `get'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:588:in `constantize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise.rb:272:in `get'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/mapping.rb:77:in `to'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/mapping.rb:72:in `modules'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/mapping.rb:89:in `routes'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/mapping.rb:156:in `default_used_route'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/mapping.rb:66:in `initialize'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise.rb:306:in `new'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise.rb:306:in `add_mapping'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/rails/routes.rb:208:in `block in devise_for'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/rails/routes.rb:207:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/devise-2.2.4/lib/devise/rails/routes.rb:207:in `devise_for'
/home/vagrant/myapp/config/routes.rb:27:in `block in <top (required)>'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb:289:in `instance_exec'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb:289:in `eval_block'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb:267:in `draw'
/home/vagrant/myapp/config/routes.rb:1:in `<top (required)>'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `block in load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `load'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:40:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:40:in `load_paths'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:16:in `reload!'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:26:in `block in updater'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/file_update_checker.rb:78:in `call'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/file_update_checker.rb:78:in `execute'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:27:in `updater'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application/finisher.rb:66:in `block in <module:Finisher>'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `instance_exec'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `run'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/initializable.rb:55:in `block in run_initializers'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `run_initializers'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application.rb:136:in `initialize!'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in `method_missing'
/home/vagrant/myapp/config/environment.rb:5:in `<top (required)>'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application.rb:103:in `require_environment!'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/gems/railties-3.2.13/lib/rails/application.rb:297:in `block (2 levels) in initialize_tasks'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:246:in `call'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:241:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:205:in `block in invoke_prerequisites'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:203:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:203:in `invoke_prerequisites'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:183:in `block in invoke_with_call_chain'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_level'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:101:in `each'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429@global/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/bin/ruby_noexec_wrapper:14:in `eval'
/home/vagrant/.rvm/gems/ruby-1.9.3-p429/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => db:migrate => environment

我怀疑这与一些postgres配置有关，但我不确定。。还没有找到任何解决方案

当检查psql时，我得到了这个

postgres=# \l
                                   List of databases
    Name     |  Owner   | Encoding |   Collate   |    Ctype    |   Access privileges
-------------+----------+----------+-------------+-------------+-----------------------
 postgres    | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 template0   | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres          +
             |          |          |             |             | postgres=CTc/postgres
 template1   | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres          +
             |          |          |             |             | postgres=CTc/postgres
 myapp_dev  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 myapp_prod | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 myapp_test | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
(6 rows)

postgres=# \d myapp_dev
Did not find any relation named "myapp_dev".

所以我想这里有点不对劲。。有解决办法吗

注意-这发生在

rake db

任务中，例如

schema:load

，

setup

如果需要，这里是与acts_as_messageable相关的错误中的相关行，包括迁移文件

用户：第120-123行

acts_as_messageable :table_name => "messages", 
                    :required   => :body,               
                    :class_name => "Message",     
                    :dependent  => :destroy        

消息类（第25-29行）

class Message

迁移文件-20121127082447_create_messages_table.rb（它不是第一个或最后一个，在中间的某个地方）

class CreateMessagesTabletrue
t、 参考：sent_messageable，：多态=>true
t、 布尔值：已打开，：默认值=>false
t、 boolean:recipient_delete，：default=>false
t、 布尔值：sender\u delete，：default=>false
t、 时间戳
#祖宗
t、 字符串：祖先
结束
添加\索引：消息，[：发送\可发送\ id，：接收\可发送\ id]，：名称=>“作为\可发送\ id”
添加索引：消息，：祖先
结束
def自动关闭
下拉列表：消息
结束
结束

只是想检查一下这里显而易见的问题，但是您是否试过运行

rake db:drop

？每当我对迁移进行更改时，我都需要在尝试创建和迁移数据库表之前删除所有数据库表

因此，完整的操作将是

rake db:drop db:create db:migrate

---

哦，您还可以尝试指定环境（我有时需要在测试环境中这样做），例如，

rake RAILS\u ENV=test db:drop db:create db:migrate

RAILS中的

Routes

文件使用

device\u for

，加载用户模型，它依次具有

作为消息可传输

并加载

消息

类。

消息

类中的第29行说：

范围：未读，其中（'receiver\u open=false'）

where

方法正在触发列查找，但由于迁移尚未运行，因此查找失败！尝试以下两种方法之一：

将此更改为：

scope:unread，其中（：receiver\u open=>false）

或者，如果这也触发了列查找，那么说：

---

scope:unread，lambda{where（'receiver\u open=false'）}

您的messages表是否存在？有没有可能你的搜索路径是错误的，或者你使用了错误的数据库，或者其他类似的东西？它还不存在，因为我根本无法迁移。在这种情况下，这不是表明你自己的代码或者你正在使用的插件的代码中存在某种流错误吗？也许可以分两个步骤或其他什么步骤进行迁移？问题是，这种迁移在heroku和windows机器中运行良好。。。您是否能够逐个查询地记录迁移过程<代码>：：regclass将生成与您的

搜索路径

匹配的第一个表，因此迁移可能只是为了满足它在其工作的计算机上某一点不应满足的要求，而不会由于查询返回正确的列名而产生任何后续影响。尝试了这一点后，它就不起作用了。。drop works、create works和migrate难道您不需要使用默认的“postgres”用户登录并在PostgreSQL中创建表吗？您应该尝试创建一个具有适当权限的单独用户名/密码并使用它。我看到了这个关于一起使用Vagrant和Postgres（）的链接-您可能需要将Vagrant设置为数据库的所有者。但是数据库已经创建，如果我使用pgpadmin检查（在安装gnome等之后），我会看到这3个数据库，但是没有创建架构。我也给了postgres和vagrant同样的权限去做几乎所有的事情。嗯，您说过命令

\d myapp\u dev

失败，因为它找不到表。你能很快用引号试试吗？所以

\d“myapp\u dev”

一些响应没有找到它。。嗯，谢谢。这节省了我很多时间。任何想法，为什么这只发生在布尔字段的情况下，我有基于其他列的其他作用域，但这些都不会产生任何问题。

acts_as_messageable :table_name => "messages", 
                    :required   => :body,               
                    :class_name => "Message",     
                    :dependent  => :destroy        

class Message < ActsAsMessageable::Message

attr_accessible :sender_open, :reciever_open
scope :unread_by, lambda{ |user| where("reciever_open = false AND received_messageable_id = ?", user.id)}
scope :unread, where('reciever_open = false')

class CreateMessagesTable < ActiveRecord::Migration
  def self.up
    create_table :messages do |t|
      t.string :topic
      t.text :body
      t.references :received_messageable, :polymorphic => true
      t.references :sent_messageable, :polymorphic => true
      t.boolean :opened, :default => false
      t.boolean :recipient_delete, :default => false
      t.boolean :sender_delete, :default => false
      t.timestamps

      # ancestry
      t.string :ancestry
    end

    add_index :messages, [:sent_messageable_id, :received_messageable_id], :name => "acts_as_messageable_ids"
    add_index :messages, :ancestry
  end

  def self.down
    drop_table :messages
  end
end