Ruby rails 4无法创建模型

模型定义

class Connection < ActiveRecord::Base
    attr_accessible :user, :user2, :message_id, :send, :receive
end

我出错了

ArgumentError: wrong number of arguments (2 for 0)
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods/read.rb:53:in `__temp__3756e646'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods.rb:330:in `clone_attribute_value'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods/dirty.rb:65:in `write_attribute'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods/write.rb:19:in `__temp__57375627='
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_assignment.rb:42:in `public_send'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_assignment.rb:42:in `_assign_attribute'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:67:in `block in assign_attributes'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:61:in `each'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:61:in `assign_attributes'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/core.rb:16:in `initialize'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/inheritance.rb:27:in `new'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/inheritance.rb:27:in `new'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/persistence.rb:45:in `create'
    from (irb):3
    from /usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in `start'
    from /usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in `start'
    from /usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands.rb:64:in `<top (required)>'
    from bin/rails:4:in `require'

ArgumentError:参数数目错误（2代表0）
from/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/attribute\u methods/read.rb:53:in`uuuu temp\uuuu3756e646'
来自/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/attribute\u methods.rb:330:in'clone\u attribute\u value'
from/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/attribute\u methods/dirty.rb:65:in'write\u attribute'
来自/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/attribute\u methods/write.rb:19:in`.\u temp\u 57375627='1〕
from/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/attribute\u assignment.rb:42:在“public\u send”中
来自/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/attribute\u assignment.rb:42:in`\u assign\u attribute'
来自/usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:67:“块在分配属性中”
来自/usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:61:in'each'
来自/usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:61:“assign_attributes”中
来自/usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/core.rb:16:在“初始化”中
from/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/heritance.rb:27:in“new”
from/usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active\u record/heritance.rb:27:in“new”
来自/usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/persistence.rb:45:in“create”
来自（irb）：3
from/usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in'start'
来自/usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in'start'
来自/usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands.rb:64:in`'
从箱子/轨道：4:in“require”

这是怎么回事？

一些想法：

试着像这样写出你的散列。创建（user\u id:current\u user.id，video\u id:@video.id，my\u third\u属性：“value”）

出于调试目的，请尝试使用[MODEL]。创建！（），这可能会引发更详细的错误

您最终将在Rails 4中得到一个警告，警告您将模型上的属性定义为attr_可访问。这是因为模型安全性已委托给具有accepts\u nester\u attributes\u for stuff的控制器

连接是类的一个非常通用的名称。该类可能已经由rails框架定义

干杯，祝你好运

一些想法：

试着像这样写出你的散列。创建（user\u id:current\u user.id，video\u id:@video.id，my\u third\u属性：“value”）

出于调试目的，请尝试使用[MODEL]。创建！（），这可能会引发更详细的错误

您最终将在Rails 4中得到一个警告，警告您将模型上的属性定义为attr_可访问。这是因为模型安全性已委托给具有accepts\u nester\u attributes\u for stuff的控制器

连接是类的一个非常通用的名称。该类可能已经由rails框架定义

---

干杯，祝你好运

send

是一种用于的Ruby内核方法，在ActiveRecord（以及其他地方）中大量使用

attr\u accessible

正在使用模型对象中的不同实现覆盖

send

方法

---

尝试为该属性使用不同的名称。

send

是一种常用的Ruby内核方法，在ActiveRecord（以及其他地方）中大量使用

attr\u accessible

正在使用模型对象中的不同实现覆盖

send

方法

---

尝试为该属性使用其他名称。

您的stacktrace不完整。@BartoszKopiński我更新了stacktrace您的stacktrace不完整。@BartoszKopiński我更新了StackTraceLight，

send

并不是属性名称的最佳选择。但是，和往常一样，事后诸葛亮是20比20。可能想使用

user\u id

和

user2\u id

（或者更好的是，

到用户id

和

从用户id

）而不是

user

和

user2

。对属性名来说，

发送

并不是最好的选择。但是，和往常一样，事后诸葛亮是20比20。可能想使用

user\u id

和

user2\u id

（或者更好的是，

到用户id

和

从用户id

）而不是

user

和

user2

。

ArgumentError: wrong number of arguments (2 for 0)
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods/read.rb:53:in `__temp__3756e646'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods.rb:330:in `clone_attribute_value'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods/dirty.rb:65:in `write_attribute'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_methods/write.rb:19:in `__temp__57375627='
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_assignment.rb:42:in `public_send'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/attribute_assignment.rb:42:in `_assign_attribute'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:67:in `block in assign_attributes'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:61:in `each'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/attribute_assignment.rb:61:in `assign_attributes'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/core.rb:16:in `initialize'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/inheritance.rb:27:in `new'
    from /usr/local/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0/lib/active_record/inheritance.rb:27:in `new'
    from /usr/local/lib/ruby/gems/2.0.0/gems/protected_attributes-1.0.3/lib/active_record/mass_assignment_security/persistence.rb:45:in `create'
    from (irb):3
    from /usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in `start'
    from /usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in `start'
    from /usr/local/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands.rb:64:in `<top (required)>'
    from bin/rails:4:in `require'