在控制器中';s action`params=params.merge({})`引发NoMethodError:undefined方法`merge';零级:零级
我正在将我的Ruby 2.3.1/Rails 4.2.5.1升级到Rails 5.0.0.1,在为以下控制器运行控制器规范时遇到一个奇怪的错误: 在我的控制器中,我有以下代码:在控制器中';s action`params=params.merge({})`引发NoMethodError:undefined方法`merge';零级:零级,merge,params,ruby-on-rails-5,nomethoderror,actioncontroller,Merge,Params,Ruby On Rails 5,Nomethoderror,Actioncontroller,我正在将我的Ruby 2.3.1/Rails 4.2.5.1升级到Rails 5.0.0.1,在为以下控制器运行控制器规范时遇到一个奇怪的错误: 在我的控制器中,我有以下代码: class Api::InboundSmsCallbackController < ActionController::Base include Api::SmsCallbackHelpers include Api::ServiceErrorHelpers # GET /inbound_sms
class Api::InboundSmsCallbackController < ActionController::Base
include Api::SmsCallbackHelpers
include Api::ServiceErrorHelpers
# GET /inbound_sms_callback/alert_acknowledgement(.:format)
def alert_acknowledgement
....
...
params.merge!({
acknowledger_user_id: acknowledger_user.id,
alert_id: alert.id,
acknowledgement_time: sms_sent_at
})
begin
creation_service = AcknowledgementAlert::CreationService.new(params)
rescue ServiceError => se
render json: json_hash, status: status
return
end
....
...
render json: json_hash, status: 200
end
end
到
我以以下方式将参数传递给我的服务类:
creation_service = AcknowledgementAlert::CreationService.new(params.to_unsafe_h)
但是,当我运行spec示例时,这个更改失败了,错误是
NoMethodError:
undefined method `merge' for nil:NilClass
错误跟踪指向我进行更改的行:
params = params.merge({
acknowledger_user_id: acknowledger_user.id,
alert_id: alert.id,
acknowledgement_time: sms_sent_at
})
这非常奇怪,因为我在计算该语句之前尝试打印params
,并且打印了一个对象:
>>>>>>>>>>>. params: <ActionController::Parameters {"message-timestamp"=>"2016-10-06 12:35:15 UTC", "msisdn"=>"919845128956", "text"=>"S3e9a6cE", "to"=>"12547836910", "controller"=>"api/inbound_sms_callback", "action"=>"alert_acknowledgement"} permitted: false>
它被执行,我的规范示例通过
我不明白为什么params=params.merge
不起作用
有人知道是什么导致了这种奇怪的行为吗
我试过的另一件事是:
params = params
ackn_params = params.merge({
acknowledger_user_id: acknowledger_user.id,
alert_id: alert.id,
acknowledgement_time: sms_sent_at
})
现在它失败了,出现了同样的错误
undefined method `merge' for nil:NilClass
因此,重新分配到params
似乎是这一现象背后的根本原因。如果这听起来是正确的,那么是否有任何特定的原因导致params
无法重新分配,因为ActionController::Parameters\merge(其他散列)
方法说
Returns a new ActionController::Parameters with all keys from other_hash merges into current hash.
谢谢。我想,这应该对您有所帮助:
params = params.permit(:values, :from, :params).to_h.merge({
acknowledger_user_id: acknowledger_user.id,
alert_id: alert.id,
acknowledgement_time: sms_sent_at
})
Params为零。您不能对不存在的内容进行.merge.permit。确保先将参数初始化为对象。谢谢。我更关心的是为什么
params=params.merge
在计算params.merge
时抱怨params为nil
。“那真是令人费解。”吉格涅什高尔说
undefined method `merge' for nil:NilClass
Returns a new ActionController::Parameters with all keys from other_hash merges into current hash.
params = params.permit(:values, :from, :params).to_h.merge({
acknowledger_user_id: acknowledger_user.id,
alert_id: alert.id,
acknowledgement_time: sms_sent_at
})