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My user has the attribute:
:step1_local
:step2_local
:step3_local
...
...
:local1
:local2
:local3
I would like to change an attribute value based on another set of attributes on the same model. I would like to do some processing mapping on user, say:
def magic (user)
user.local(1..3) = process(user.step(1..3)_local)
end
The code above of course does not work (example). I am not sure how to do it dynamically without going through each attributes individually. I want to map processing one to another. Any ideas?
You can use Object#public_send and method, like this:
def magic(user)
(1..3).each do |n|
user.public_send("local#{n}=", process(user.read_attribute("step#{n}_local")))
end
end
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please I need a little help... I don't know what I'm doing wrong but I need just a simple select query with Active Record. This looks my code:
Model:
class Kiosk < ApplicationRecord
#kiosk = Kiosk.all
end
Controller:
class KioskController < ApplicationController
def kiosk
#kiosk = Kiosk.all
end
end
HAML:
##kiosk
And it just doing nothing. Even if I change a password of database there isn't any error with connection. rake db:migrade was done a db was created.
Thanks
You may want to look at your logs (eg Rails.root => logs/development.log) or the output in your terminal – are there any error messages? If you log in to your console with eg rails console and run #kiosks = Kiosk.all – what are you seeing? or how about Kiosk.count –– is it showing that there are any kiosks? As mentioned the model looks funny... not sure why you have the #kiosk = Kiosk.all line in there at all....
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My rails app is receiving the following from the json. How do I access the name key of attributes and the calendar id in Ruby.
Parameters: {"data"=>{"type"=>"user-events", "attributes"=>{"name"=>"An event", "location"=>"University of Illinois at Urbna-Champaign", "notes"=>"Testing my eventf\n", "all-day"=>false, "recurring"=>false, "sunday"=>false, "monday"=>false, "tuesday"=>false, "wednesday"=>false, "thursday"=>false, "friday"=>false, "saturday"=>false, "start-date"=>"01-16-2018", "stop-date"=>"01-16-2018", "start-time"=>"04:32PM", "stop-time"=>"05:32PM"}, "relationships"=>{"calendar"=>{"data"=>{"type"=>"calendars", "id"=>"685"}}}}}
Do I use the code below to access the name attribute ?
params[:data][:attributes][:name]
Also, do I use the following to access the id for the calendars ?
params[:data][:relationships][:calendar][:data][:id]
Thanks in advance for your help
If your Hash name is Parameters
Parameters['data']['attributes']['name'] # "An event"
Parameters['data']['relationships']['calendar']['data']['id'] # "685"
if it's params, then
params['data']['attributes']['name'] # "An event"
params['data']['relationships']['calendar']['data']['id'] # "685"
will access the attributes.
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I want to check if param key exists with a variable name and if it exists I want to use value something like params[filenamestring[-1]].
filenamestring is any array generate with split
generally we use params like params[:key] but here i have array and want to use params value with array last element like params[filenamestring[-1]]
You are looking for this:
if params.key?(filenamestring[-1])
This will check if the key exists within the params.
Edit: Something like this would add the param to an array:
my_array << params[filenamestring[-1]] if params.key?(filenamestring[-1])
Or to add it to a string or integer:
my_variable + params[filenamestring[-1]] if params.key?(filenamestring[-1])
If you are doing something else, let me know and I'll update my answer again.
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I currently have a separate .rb file that contains smth like this:
if lang == 'fr'
#a = 'AAAAAAA'
#b = 'BBBBBBB'
#c = 'CCCCCCC'
else
#a = 'sadadddsad'
#b = 'dsafdsfdasfdsa'
#c = 'dsadasfdsfsfd'
end
, only with a lot more strings.
Being a large library of strings, and wanting to keep this in one place as these will be used in multiple controllers and functions within, what is a good method to call these files from inside a function in controllers?
Looks like you want to use Internationalization in your app. You could follow this link http://guides.rubyonrails.org/i18n.html to know more and its implementation.
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If I have a form input where someone puts 'facebook.com' or 'google.com' it turns it into a valid URL adding http:// so that rails can use it. What I want is to have a form where you input a URL and it grabs the 3 most used words at that site and shows them in a list on the results page. This list should be accessible later, so I also need to store those words with that URL
def smart_add_url_protocol
url = Url.find_by(params[:url])
unless self.url[/\Ahttp:\/\//] || self.url[/\Ahttps:\/\//]
self.url = "http://#{self.url}"
end
end
something like this.
You can use URI::HTTP#build like so:
URI::HTTP.build(host: 'facebook.com').to_s
#=> "http://facebook.com"
I recommend the Addressable gem which is somewhat smart about guessing URLs from strings:
require "addressable/uri"
Addressable::URI.heuristic_parse(some_string_with_an_url).to_s