it is the first time to encounter this error in rails and i really don't know where is it coming from here is the function implementation :
def self.send (sender,recivers,content)
recivers.each do |reciver|
#notification = Notification.new
#notification.sender= sender
#notification.user = reciver
#notification.body = content
#notification.save
end
end
and here is how am calling it :
def after_create(announcment)
instructor_id = announcment.course.instructor_id
sender = User.find_by_id(instructor_id)
students = announcment.course.users
body = announcment.announcment
coures_name = announcment.course.name
Notification.send(sender,students,body)
UserMailer.notify_students_course(students,coures_name)
end
send is a Ruby method from Object class (so every class inherits it) that calls the method named with first argument and parameters the rest of the arguments given to send. Also in RoR its a reserverd word.
Better not overriding it, because it can get messy.
Related
I have a method in my helper that returns rows of results. I want to pass this to a method in my model which is called by another method.
Helper Method:
def transactions(account_id, start, finish)
response = get_call('/Accounts/Statements/' + account_id.to_s + '/' + start + '/' + finish)
response = JSON.parse(response.body)
#transactions = response.map {|txn| Transaction.new(txn)}
return #transactions
end
Model Method I wish to call helper method into:
def transaction
??
end
Model Method which requires the transaction method:
def to_pdf
title = #account.name
subtitle = "Account Statement: #{#month_name} #{#year}"
StatementPDF.new(title, subtitle, #transactions).render
end
In the initialise section of this method i have added:
#transactions = {}
The Prawn PDF is now being generated but without the rows of results. Let me know if any other information is required.
You can reference your helpers from models using ApplicationController.helpers method:
ApplicationController.helpers.transactions(...)
This will solve your problem but, in my opinion, it would be much better, if you refactor your code and don't use helpers from model.
I am having a problem that when ever I call the update function it throws an error. I have tried to find the solution but I could'nt find it and I can't understad the error. Please tell me what is wrong with the code
The update function is called from this function
def bookmark_request
data = params[:d]
request_bookmarked = Request.getRequest(data)
bookmarked_against_Request = Request.first
request_bookmarked_2 = request_bookmarked
bookmarked_against_Request_2 = bookmarked_against_Request
if bookmarked_against_Request_2[:favourites]
bookmarked_against_Request_2[:favourites] << bookmarked_against_Request[:id]
else
bookmarked_against_Request_2[:favourites] = Array.new
bookmarked_against_Request_2[:favourites] << bookmarked_against_Request[:id]
end
Request.updateRequest(bookmarked_against_Request , bookmarked_against_Request_2)
redirect_to :action => "active"
end
and the update code is this
def updateRequest(request,req_data)
if request.update(req_data)
request
end
end
The error that I am getting is this
**NoMethodError at requests/bookmark_request
undefined method `empty?' for Request:0x007f3fa44c59b0**
The error always comes on the line if request.update(req_data)
Sice I do not have a reputation of 10 so I am posting links to screenshot of the error
http://tinypic.com/r/whbiv7/8
update() method's argument is expected to be a hash. But your req_data argument becomes actually a Request here:
def bookmark_request
bookmarked_against_Request = Request.first
...
bookmarked_against_Request_2 = bookmarked_against_Request
...
end
And Request class has no empty? method. Moreover it might become nil, if there are no Requests at all.
I am creating an instance method on a model which returns instances of the same model. How can I ensure that the instance of the model that the method is being called upon is not part of the output?
My code is like this at the moment:
def other_versions(include_current = true)
if include_current
Coaster.where(order_ridden: order_ridden)
else
#coaster.other_version_count // Need this to exclude the current instance.
end
end
I'm not sure I understood, but would this help?
def other_versions(include_current = true)
query = Coaster.where(order_ridden: order_ridden)
query = query.where("id != ?", id) unless include_current
query
end
I have the following module/class:
module Pigeons
class FedEx
attr_accessor :signature_name
def initialize(account)
self.account = account
end
def response(number)
body = "...some xml..."
return HTTParty.post('http://example.com', :body => body)
end
def track(number)
details = response(number)
self.signature_name = details[:delivery_signature_name]
end
end
end
What I'd like to be able to do is this:
#fedex ||= Pigeons::FedEx.new('123abc')
tracker = fedex.track('1234567890')
tracker.signature_name
Everything is working up until the tracker.signature_name part, which throws an undefined method 'signature_name' for nil:NilClass error.
The problem is in this line:
self.signature_name = details[:delivery_signature_name]
details[:delivery_signature_name] turns out to be nil, which is then assigned to self.signature_name and then becomes return value of track method. And here
tracker = fedex.track('1234567890')
tracker.signature_name
tracker will be nil and you try to call a method on it.
You probably meant to write this instead:
def track(number)
details = response(number)
self.signature_name = details[:delivery_signature_name]
self # <== here
end
You need two methods called signature_name= and response that do whatever they are supposed to do in your class.
I am using ruby-aaws to return Amazon Products and I want to enter them into my DB. I have created a model Amazonproduct and I have created a method get_amazon_data to return an array with all the product information. When i define the specific element in the array ( e.g. to_a[0] ) and then use ruby-aaws item_attributes method, it returns the name I am searching for and saves it to my DB. I am trying to iterate through the array and still have the item_attributes method work. When i don't define the element, i get this error: undefined method `item_attributes' for #Array:0x7f012cae2d68
Here is the code in my controller.
def create
#arr = Amazonproduct.get_amazon_data( :r ).to_a
#arr.each { |name|
#amazonproduct = Amazonproduct.new(params[:amazonproducts])
#amazonproduct.name = #arr.item_attributes.title.to_s
}
EDIT: Code in my model to see if that helps:
class Amazonproduct < ActiveRecord::Base
def self.get_amazon_data(r)
resp = Amazon::AWS.item_search('GourmetFood', { 'Keywords' => 'Coffee Maker' })
items = resp.item_search_response.items.item
end
end
Thanks for any help/advice.
I'm not familiar with the Amazon API, but I do observe that #arr is an array. Arrays do not usually have methods like item_attributes, so you probably lost track of which object was which somewhere in the coding process. It happens ;)
Try moving that .item_attributes call onto the object that supports that method. Maybe amazonproduct.get_amazon_data(:r), before its being turned into an array with to_a, has that method?
It's not quite clear to me what your classes are doing but to use #each, you can do something like
hash = {}
[['name', 'Macbook'], ['price', 1000]].each do |sub_array|
hash[sub_array[0]] = sub_array[1]
end
which gives you a hash like
{ 'name' => 'Macbook', 'price' => 1000 }
This hash may be easier to work with
#product = Product.new
#product.name = hash[:name]
....
EDIT
Try
def create
#arr = Amazonproduct.get_amazon_data( :r ).to_a
#arr.each do |aws_object|
#amazonproduct = Amazonproduct.new(params[:amazonproducts])
#amazonproduct.name = aws_object.item_attributes.title.to_s
end
end