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[英]How To Fix undefined method `product' for #<LineItem::ActiveRecord_Relation:0x0000000017b22f70>
[英]undefined method `to_f' for #<ActiveRecord::Relation:0x472d0a0>
我正在嘗試構建一個呼叫跟蹤應用程序,作為學習rails和twilio的一種方式。 現在,我想做的是制作一個圖表,顯示每天特定手機的電話數量。
我的數據結構的設置方式是手機型號有多次調用。
在我的手機型號中,我有
def total_on(date)
self.calls.where("placed_at >= ? AND placed_at <= ?", date.beginning_of_day, date.end_of_day)
end
在我看來,我有以下javascript:
<script type="text/javascript" charset="utf-8">
$(function () {
new Highcharts.Chart({
chart: { renderTo: 'calls_chart' },
title: { text: 'Calls Per Day' },
xAxis: { type: 'datetime' },
yAxis: {
title: { text: ' Calls'}
},
series: [{
name: "<%= @phone.name %>",
pointInterval: <%= 6.days * 1000 %>,
pointStart: <%= 1.month.ago.at_midnight.to_i * 1000 %>,
data: <%= (1.month.ago.to_date..Date.today).map { |date| @phone.total_on(date).to_f}.inspect %>
}]
});
});
重要的部分是數據:
<%= (1.month.ago.to_date..Date.today).map { |date| @phone.total_on(date).to_f}.inspect %>
當我嘗試在每天撥打電話數據時,我收到錯誤
undefined method `to_f' for #<ActiveRecord::Relation:0x472d0a0>
老實說,我不確定我是否在這里做任何事情。 一個伙伴stackoverflower幫助我制作了上面提到的實例方法,所以我假設它比我寫的要好很多。
那么,我需要改變什么才能在視圖中調用特定日期的電話號碼?
UPDATE
在Zack回答之后,我現在得到了錯誤
SQLite3::SQLException: no such column: calls.placed_at: SELECT COUNT(*) FROM "calls" WHERE "calls"."phone_id" = 44 AND ("calls"."placed_at" BETWEEN '2012-09-11 00:00:00.000000' AND '2012-09-11 23:59:59.999999')
可能我混淆了我所擁有的關聯或其他東西。 以下是具有數據結構的模型,如果它們有幫助 -
手機型號
# == Schema Information
#
# Table name: phones
#
# id :integer not null, primary key
# name :string(255)
# twilio_number :integer
# original_number :integer
# user_id :integer
# created_at :datetime not null
# updated_at :datetime not null
#
class Phone < ActiveRecord::Base
attr_accessible :original_number, :user_id, :name, :twilio_number
belongs_to :user
has_many :calls, dependent: :destroy
validates :name, presence: true
validates :twilio_number, presence: true
validates :original_number, presence: true
validates :user_id, presence: true
default_scope order: 'phones.created_at DESC'
validate :check_phone_limit, :on => :create
def check_phone_limit
if User.find(self.user_id).at_max_phone_limit?
self.errors[:base] << "Cannot add any more phones"
end
end
def original_number=(value)
num = value.to_s.gsub(/[^0-9+]/, "")
write_attribute(:original_number, num.to_i)
end
def total_on(date)
self.calls.where(placed_at: date.beginning_of_day..date.end_of_day).count
end
end
呼叫模型
# == Schema Information
#
# Table name: calls
#
# id :integer not null, primary key
# AccountSid :string(255)
# From :string(255)
# To :string(255)
# CallStatus :string(255)
# ApiVersion :string(255)
# Direction :string(255)
# FromCity :string(255)
# FromState :string(255)
# FromZip :string(255)
# FromCountry :string(255)
# ToCity :string(255)
# ToState :string(255)
# ToZip :string(255)
# ToCountry :string(255)
# CallSid :string(255)
# DialCallSid :string(255)
# DialCallDuration :string(255)
# DialCallStatus :string(255)
# RecordingUrl :string(255)
# phone_id :integer
# DialCallMinutes :integer
# created_at :datetime
# updated_at :datetime
#
class Call < ActiveRecord::Base
attr_accessible :AccountSid, :From, :To, :CallStatus, :ApiVersion, :Direction, :FromCity, :FromState, :FromZip, :FromCountry, :ToCity, :ToState, :ToZip, :ToCountry, :CallSid, :DialCallSid, :DialCallDuration, :DialCallStatus, :RecordingUrl, :DialCallMinutes
belongs_to :phone
def self.create_from_incoming_call(params)
user_phone = Phone.find_by_twilio_number(params['To']) #Finds the phone number in the database based on what phone Twilio is calling
twilio_request_params = {
:CallSid => params['CallSid'],
:AccountSid => params['AccountSid'],
:From => params['From'],
:To => params['To'],
:CallStatus => params['CallStatus'],
:ApiVersion => params['ApiVersion'],
:Direction => params['Direction'],
:FromCity => params['FromCity'],
:FromState => params['FromState'],
:FromZip => params['FromZip'],
:FromCountry => params['FromCountry'],
:ToCity => params['ToCity'],
:ToState => params['ToState'],
:ToZip => params['ToZip'],
:ToCountry => params['ToCountry']
}
call = Call.new(twilio_request_params)
call.save
return call
end
def Call.update_dial_call(params)
twilio_request_params = {
:DialCallSid => params['DialCallSid'],
:DialCallDuration => params['DialCallDuration'],
:DialCallStatus => params['DialCallStatus'],
:RecordingUrl => params['RecordingUrl'],
:DialCallMinutes => (params['DialCallDuration'].to_f/60.to_f).ceil
}
call = Call.where( :CallSid => params['CallSid'] ).first
call.update_attributes twilio_request_params
call.save
end
end
電話節目行動
def show
@user = current_user
@phone = Phone.find_by_id(params[:id])
@calls = @phone.calls.paginate(page: params[:page])
end
並且,視圖中的javascript(重復以便於閱讀)
<script type="text/javascript" charset="utf-8">
$(function () {
new Highcharts.Chart({
chart: { renderTo: 'calls_chart' },
title: { text: 'Calls Per Day' },
xAxis: { type: 'datetime' },
yAxis: {
title: { text: ' Calls'}
},
series: [{
name: "<%= @phone.name %>",
pointInterval: <%= 6.days * 1000 %>,
pointStart: <%= 1.month.ago.at_midnight.to_i * 1000 %>,
data: <%= (1.month.ago.to_date..Date.today).map { |date| @phone.total_on(date).to_f}.inspect %>
}]
});
});
</script
>
你的total_on
方法返回一個關聯,而不是一個數字。
嘗試附加.count
:
def total_on(date)
calls.where("placed_at >= ? AND placed_at <= ?", date.beginning_of_day, date.end_of_day).count
end
你也可以給它一個日期范圍來縮短方法(實際上相同,但更容易閱讀):
def total_on(date)
calls.where(placed_at: date.beginning_of_day..date.end_of_day).count
end
更新:
原始的“placement_at”查詢是否有效,或者由於NoMethodError
而從未實際調用NoMethodError
?
它看起來不像你的模型中有一個placed_at
列,但我想你也可以使用created_at
。
如果你想使用placed_at
,你可以定義這個方法(我把名字placed_on
為了樣式的placed_on
):
class Call < ActiveRecord::Base
def self.placed_on(date)
where(created_at: date.beginning_of_day..date.end_of_day)
end
end
你可以將它鏈接到你的total_on
方法:
class Phone < ActiveRecord::Base
def total_on(date)
calls.placed_on(date).count
end
end
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