I'm trying to get data out of this datamapper object and then putting it into a loop and getting the data out of the object that way, but it doesn't seem to be working, this is the code I have:
#user = User.get(session[:user])
#polls = []
polls = Poll.all(:user_id => #user)
polls.each do |poll|
pollname << poll.name
#polls << pollname
end
and in my erb file:
<% #polls.each do |poll| %>
<p><%= poll %></p>
<% end %>
I thinks what you want is:
#user = User.get(session[:user])
#polls = Poll.where(user_id: #user.id).all.collect { |p| p.name }
Related
In my database I have column :inviter and some users have same content in that column
I want find all them,with same content
In my user controller:
def foll
#user = current_user
#ref = User.find_by_invite(#user.id.to_s)
if !#ref || !#ref.pay_s || !#ref.pay_1 || !#ref.pay_2 || !#ref.pay_3
#referals = false
else
#referals = User.find_by_invite(#user.id.to_s)
end
end
In my views
<% if #referals != false %>
<% #referals.each do |user| %>
<h4>
<%= link_to user.name, user %> status : Good
</h4>
<% end %>
<% else %>
<h3>You dont have any referrals</h3>
<% end %>
When I try I have this error
undefined method `each' for #<User:0x007f13e41b0068>
this will raise error since
#referals = User.find_by_invite(#user.id.to_s)
will return single record
you can try #where to query all referrals
#referals = User.where(invite: #user.id.to_s)
you can also refer here for other queries
http://guides.rubyonrails.org/active_record_querying.html
hope this helps
Hope this help:
controller:
def foll
#user = current_user
#ref = User.find_by_invite(#user.id.to_s)
if !#ref || !#ref.pay_s || !#ref.pay_1 || !#ref.pay_2 || !#ref.pay_3
#referals = []
else
#referals = User.where(invite: #user.id.to_s)
end
end
view:
<% if #referals.any? %>
<% #referals.each do |user| %>
<h4>
<%= link_to user.name, user %> status : Good
</h4>
<% end %>
<% else %>
<h3>You dont have any referrals</h3>
<% end %>
I got four different models.
Here's an example,
#single = Single.all
#coe = Coe.all
#blend = Blend.all
#production = #single+#coe+#blend
then how to check which model #production is?
I tried
<% #production.each do |p| %>
<%=p.class.name%>
<% end %>
but it returns "Array"
It seems to be simple, but I can't find out
(I edited question)
The problem is here
#single = Single.all
#coe = Coe.all
#blend = Blend.all
#production = #single+#coe+#blend
change these lines with
#single = Single.all.to_a
#coe = Coe.all.to_a
#blend = Blend.all.to_a
#production = #single+#coe+#blend
and then if you will check
#production.first.class.name #Single
#production.last.class.name #Blend
so in your view you can do this
<% #production.each do |p| %>
<% p.each do |product| %>
<%= product.class.name %>
<% end %>
<% end %>
if while iterating on #production it returns array so you need to try this.
<% #production.each do |p| %>
<% p.each do |product| %>
<%= product.class.name %>
<% end %>
<% end %>
#production is a collections of combinations of single, coe, and blend thats why #production.class.name doesnt work, you need to iterate each object like this:
<% #production.each do |object| %>
<%= object.class.name %>
<% end %>
Expanding on Rails: How to extract values from hash? (Amazon API / Vacuum) -- how do I make these newly dug up values available to my views?
Currently getting:
undefined method `image_url' for #<Hash:0x848402e0>
Extracted source (around line #5):
<%= link_to image_tag(product.image_url), product.url %>
main_controller.rb:
class MainController < ApplicationController
def index
request = Vacuum.new('GB')
request.configure(
aws_access_key_id: 'ABCDEFGHIJKLMNOPQRST',
aws_secret_access_key: '<long messy key>',
associate_tag: 'lipsum-20'
)
params = {
'SearchIndex' => 'Books',
'Keywords'=> 'Ruby on Rails',
'ResponseGroup' => "ItemAttributes,Images"
}
raw_products = request.item_search(query: params)
hashed_products = raw_products.to_h
# puts hashed_products['ItemSearchResponse']['Items']['Item'].collect{ |i| i['ItemAttributes']['Title'] }
# puts hashed_products['ItemSearchResponse']['Items']['Item'].collect{ |i| i['DetailPageURL'] }
# puts hashed_products['ItemSearchResponse']['Items']['Item'].collect{ |i| i['LargeImage']['URL'] }
#products = []
#products = hashed_products['ItemSearchResponse']['Items']['Item'].each do |item|
product = OpenStruct.new
product.name = item['ItemAttributes']['Title']
product.url = item['DetailPageURL']
product.image_url = item['LargeImage']['URL']
#products << product
end
end
end
index.html.erb:
<h1>Products from Amazon Product Advertising API</h1>
<% if #products.any? %>
<% #products.each do |product| %>
<div class="product">
<%= link_to image_tag(product.image_url), product.url %>
<%= link_to product.name, product.url %>
</div>
<% end %>
<% end %>
I wouldn't turn the entire Amazon hash into an OpenStruct. And since product.name is nil you can't do a find on it.
Instead, just loop through the Amazon items, assign them to your product, and then add to the #products array:
#products = []
hashed_products['ItemSearchResponse']['Items']['Item'].each do |item|
product = OpenStruct.new
product.name = item['ItemAttributes']['Title']
#products << product
end
i need update a single record attribute but i can´t. alumno_id is foreign key of model 'alumno'. the code show the records and if submit 'Aceptar' in one record, need a change the attribute estado to 1
in Model
class Postulacion < ActiveRecord::Base
attr_accessible :ramo, :estado, :alumno_id
belongs_to :alumno
end
in View
<h1>Lista de Postulaciones</h1>
<% #postulaciones.each do |p| %>
<% #id = p.id %>
<%= #id %>
<p>
<td><%= Alumno.find(p.alumno_id).full_name%></td>
<td><%='=> '+ p.ramo %></td>
<td><% if p.estado == 0 %>
<%= 'Pendiente =>' %>
<%= form_tag :action => 'aceptar' do %>
<%= submit_tag 'Aceptar' %></p>
<%end%>
<%else%>
<%='=> Aceptado' %>
<%end%>
</td>
</p>
<% end %>
in controller
class ListadoController < ApplicationController
def listar
#postulaciones = Postulacion.all
respond_to do |format|
format.html
format.json { render json: #postulaciones }
end
end
def aceptar
#postulacion = Postulacion.where(id: #id).first #Edit
#postulacion.estado = 1 #Edit
#postulacion.save #Edit
redirect_to "/"
end
end
Error "undefined method `update_attribute' for []:ActiveRecord::Relation"
Thanks
With this code:
#postulacion = Postulacion.where(alumno_id: #id )
You are declaring #postulacion as a collection, not as a single instance. You can fix this by calling .first:
#postulacion = Postulacion.where(alumno_id: #id ).first
Or by using find_by instead of where:
#postulacion = Postulacion.find_by(alumno_id: #id )
One other thing - this code isn't checking for the possibility that the Postulacion instance might not exist. You should add some logic to handle this...
Your #postulacion variable holds ActiveRecord::Relation instead of single ActiveRecord object. Try:
def acceptar
#postulacion = Postulacion.find_by_alumino_id(#id)
# ...
end
or, if you'd be using Rails 4:
#postulacion = Postulacion.find_by(alumino_id: #id)
View:-
<% #dating_advices.each do |da| %>
<% if da['is-displayed'][0]['content'] == 'true' %>
<div class="dating_advice">
<h4><%= da['title'][0] %></h4>
<p><b><%= da['author'][0] %></b></p>
<p><%= da['content'] %></p>
</div>
<hr>
<% end %>
<% end %>
Controller:-
def dating_advices
#current_menu = "MatchMasters"
logger.debug "*** Current site id: #{#current_site.id}"
##hide_quick_search = true
#passed_args = {
'event_action' => 'ws',
'site_id' => #current_site.site_id
}
result = call_dating_advices_ws(#passed_args)
if result && result['errorcode'][0] == 'success'
#dating_advices = result['payload'][0]['payload']
end
end
Now when I click on dating advices on my webpage it gives an error"Getting Template::Error (Undefined method 'each') for nil:NIL Class"
You probably didn't get any #dating_advices -- which would mean you're calling each on an instance var that doesn't exist.
The way your controller is written, #dating_advices is never defined if the result variable is not defined.
You could quickly patch it with a #dataing_advices = [] (or a hash -- anything with an .each method) and figure out why your controller is failing.
You could do something like
if result && result['errorcode'][0] == 'success'
... your dating advice code
else
raise result
(or #dating_advice = {})
end
basically you need to always defined #dating_advice OR you need to handle that value not being defined in your view.