So, I want to access one of the variables from my quotes model:
class Quotes < ActiveRecord::Base
attr_accessible :quotes1, :quotes10, :quotes2, :quotes3, :quotes4, :quotes5, :quotes6, :quotes7, :quotes8, :quotes9
attr_accessor :quotes1, :quotes10, :quotes2, :quotes3, :quotes4, :quotes5, :quotes6, :quotes7, :quotes8, :quotes9
end
Here is my pages controller, because I want to access it in views/pages/home.html.haml:
def home
#quotes = Quotes.find(:first, :order => "RANDOM()")
end
And here is my home.html.haml:
%h2
Client's opinions
%p
=#quotes
All of these quotes from 1...10 are strings, and have default values, they are not nil. And still I am not getting anything on my home page. Why?
controller:
quotes_number = (srand % 10) + 1
#quotes = Quotes.find(:first, :order => "RANDOM()").send(:"quotes#{quote_number}")
view:
%h2
Client's opinions
%p
=#quotes
Related
here is my code:
Perk not save on multiple select,when multiple true/false. perk save and habtm working.
class Perk < ActiveRecord::Base
has_and_belongs_to_many :companies
end
class Company < ActiveRecord::Base
has_and_belongs_to_many :perks
end
view perk/new.html.erb
<%= select_tag "company_id", options_from_collection_for_select(Company.all, 'id', 'name',#perk.companies.map{ |j| j.id }), :multiple => true %>
<%= f.text_field :name %>
Controller's code:
def new
#perk = Perk.new
respond_with(#perk)
end
def create
#perk = Perk.new(perk_params)
#companies = Company.where(:id => params[:company_id])
#perk << #companies
respond_with(#perk)
end
Your select_tag should return an array of company_ids:
<%= select_tag "company_ids[]", options_from_collection_for_select(Company.all, 'id', 'name',#perk.companies.map{ |j| j.id }), :multiple => true %>
http://apidock.com/rails/ActionView/Helpers/FormTagHelper/select_tag#691-sending-an-array-of-multiple-options
Then, in your controller, reference the company_ids param:
#companies = Company.where(:id => params[:company_ids])
(I assume that you've intentionally left out the #perk.save call in your create action... Otherwise, that should be included as well. Model.new doesn't store the record.)
It sounds like you may not have included company_id in the perk_params method in your controller. Rails four uses strong pramas this means you need to state the params you are allowing to be set.However it is difficult to say for sure without seeing more of the code.
In your controller you should see a method like this (there may be more options that just :name):
def perk_params
params.require(:perk).permit(:name)
end
You should try adding :company_id to it so it looks something like this:
def perk_params
params.require(:perk).permit(:name, :company_id)
end
if there are other params int your method leave them in and just added :company_id
EDIT to original answer
The above will only work on a one-to-many or one-to-one because you are using has_and_belongs_to_many you will need to add companies: [] to the end of your params list like this
def perk_params
params.require(:perk).permit(:name, companies: [] )
end
or like this
def perk_params
params.require(:perk).permit(:name, companies_ids: [] )
end
See these links for more details:
http://edgeapi.rubyonrails.org/classes/ActionController/StrongParameters.html
http://edgeguides.rubyonrails.org/action_controller_overview.html#strong-parameters
What is the purpose of defining methods inside a model like the example here? What does this get me? I was under the impression that only the fields of a model are defined in the model.
class Bean
include Mongoid::Document
field :name, type: String
field :roast, type: String
field :origin, type: String
field :quantity, type: Float
has_many :pairings
# has_many :pastries
def pastries
Pastry.find pastry_ids
end
#accepts_nested_attributes_for :pastries
def pastry_ids
pastry_ids_array = []
self.pairings.each do |one_pairing|
if one_pairing.pastry_id
pastry_ids_array.push one_pairing.pastry_id
end
end
pastry_ids_array
end
def pastry_ids=(list)
self.pairings.destroy
list.each do |pastry_id|
self.pairings.create(pastry_id: pastry_id)
end
end
# some way of showing a list
def pastry_list
pastries_string = ""
pastries.each do |one_pastry|
pastries_string += ", " + one_pastry.name
end
pastries_string.slice(2,pastries_string.length - 1)
pastries_string
end
end
I don't know if you know enough ruby but let's say you don't. This is a basic Class question? Defining methods on a model it's like having an helper. Let's say that you have
class CanadianPopulation
attr_accessor :population, :number_of_french_speaker, :number_of_english_speaker
def initialize(a,b,c)
#population = a
#number_of_french_speaker = b
#number_of_english_speaker = c
end
def total_people_that_have_a_different_mother_tongue
#Canadian who speak english or french but have a different mother tongue
self.population - (self.number_of_french_speaker + self.number_of_english_speaker)
end
end
census_2014 = CanadianPopulation.new(34_000_000, 4_000_000, 12_000_000)
let's say that you didn't have the method total_people_that_have_a_different_mother_tonguehow will you do to retrieve the total number of Canadians that have a different mother tongue? you will do the caculation yourself like for a view
<p>Canadian who speak english or french but have a different mother tongue
<br>
<%= #census = #census.population - (#census.number_of_english_speaker + #census.number_of_french_speaker) %>
</p>
Your view or your controller shouldn't do much logic (calculations) so that's one of the reason why you have a method inside the model (or class) it should be like this
<p>Canadian who speak english or french but have a different mother tongue
<br>
<%= #census.total_people_that_have_a_different_mother_tongue %>
</p>
For the second part of your question what does those methods do. rails c -s on your terminal than call or create a new instance model Bean and check to see what it does (the output/results)
Bean.first
b = _
b.pastries
b.pastry_ids
b.pastry_list
edit: #paul-richer recommends to maintain a thin controller
I have a record called Feeds that contains the field 'last_visited' and 'last_modified', both are timestamps.
I'm trying to render a list in a view of alls Feeds where last_modified > last_visited.
I currently have this:
Controller
#feeds = #user.feeds
#feeds_hot = #feeds.where(['#feeds.last_modified > ?', #feeds.last_visited])
Have a feeling I'm way off track here. Should I also being using a model class to do this?
Any helps is greatly appreciated.
Edit:
Here's my model
class Feed < ActiveRecord::Base
attr_accessible :feed_id, :feed_url, :last_modified, :title, :url, :last_visited, :user_id
belongs_to :user
scope :hottest, lambda {where('last_modified > ?', :last_visited)}
def fetch_feed!
feed = Feedzirra::Feed.fetch_and_parse(feed_url) # probably want some eror handling here
self.title = feed.title
self.url = feed.url
self.last_modified = feed.last_modified
self.last_visited = feed.last_modified
self #or nil if you like
end
def self.check_for_update(feed)
fetched_feed = Feedzirra::Feed.fetch_and_parse(feed.feed_url)
entry = fetched_feed.entries.first
feed.last_modified = entry.published
end
def update_visit_date!
date = Time.now
update_attribute(:last_visited, date)
self
end
end
Edit
Updated code
Controller
def home
#user = current_user
#feeds = #user.feeds
#feeds_hot = #feeds.hottest
end
Model
attr_accessible :feed_id, :feed_url, :last_modified, :title, :url, :last_visited, :user_id
belongs_to :user
scope :hottest, lambda {where("'last_modified' > ?", 'last_visited')}
View
%ol.feeds.feeds_hot
- #feeds_hot.each do |feed|
%li.feed.hot[feed]
= render :partial => 'feeds/feed_link', :locals => {:feed => feed}
Unfortunately it's still not rendering the hot feeds in the view when I have a feed with the following data:
Last Modified 2013-06-14 23:49:07 UTC
Last Visited 2013-06-14 23:47:55 UTC
Last Modified is a few hours > than Last Visited
If you're looking to get a list of all feeds that have been modified more recently than the most recent visit on any feed, the following will work:
last_visit = Feed.order("last_visited").last.last_visited
#feeds = #user.feeds
#hot_feeds = Feed.where("last_modified > ?", last_visited)
EDIT:
Based on your comments and a re-reading of your question, the code posted above will not accomplish what you're trying to do. Since you're trying to get a list of all invites where each has been modified since it was last visited, you'll want to create a model scope to do the lookup with ActiveRecord. The following code should work:
# app/models/feed.rb
class Feed < ActiveRecord::Base
scope :hottest, lambda {where('last_modified > ?', :last_visited)}
end
Then, you can run the following in a console, controller, or view:
#user.invites.hottest
#=> array of all the user's invites that have been modified more recently than they have been viewed
So I am trying to implement multiple autocomplete using this gem and simple_form and am getting an error.
I tried this:
<%= f.input_field :neighborhood_id, collection: Neighborhood.order(:name), :url => autocomplete_neighborhood_name_searches_path, :as => :autocomplete, 'data-delimiter' => ',', :multiple => true, :class => "span8" %>
This is the error I get:
undefined method `to_i' for ["Alley Park, Madison"]:Array
In my params, it is sending this in neighborhood_id:
"search"=>{"neighborhood_id"=>["Alley Park, Madison"],
So it isn't even using the IDs for those values.
Does anyone have any ideas?
Edit 1:
In response to #jvnill's question, I am not explicitly doing anything with params[:search] in the controller. A search creates a new record, and is searching listings.
In my Searches Controller, create action, I am simply doing this:
#search = Search.create!(params[:search])
Then my search.rb (i.e. search model) has this:
def listings
#listings ||= find_listings
end
private
def find_listings
key = "%#{keywords}%"
listings = Listing.order(:headline)
listings = listings.includes(:neighborhood).where("listings.headline like ? or neighborhoods.name like ?", key, key) if keywords.present?
listings = listings.where(neighborhood_id: neighborhood_id) if neighborhood_id.present?
#truncated for brevity
listings
end
First of all, this would be easier if the form is returning the ids instead of the name of the neighborhood. I haven't used the gem yet so I'm not familiar how it works. Reading on the readme says that it will return ids but i don't know why you're only getting names. I'm sure once you figure out how to return the ids, you'll be able to change the code below to suit that.
You need to create a join table between a neighborhood and a search. Let's call that search_neighborhoods.
rails g model search_neighborhood neighborhood_id:integer search_id:integer
# dont forget to add indexes in the migration
After that, you'd want to setup your models.
# search.rb
has_many :search_neighborhoods
has_many :neighborhoods, through: :search_neighborhoods
# search_neighborhood.rb
belongs_to :search
belongs_to :neighborhood
# neighborhood.rb
has_many :search_neighborhoods
has_many :searches, through: :search_neighborhoods
Now that we've setup the associations, we need to setup the setters and the attributes
# search.rb
attr_accessible :neighborhood_names
# this will return a list of neighborhood names which is usefull with prepopulating
def neighborhood_names
neighborhoods.map(&:name).join(',')
end
# we will use this to find the ids of the neighborhoods given their names
# this will be called when you call create!
def neighborhood_names=(names)
names.split(',').each do |name|
next if name.blank?
if neighborhood = Neighborhood.find_by_name(name)
search_neighborhoods.build neighborhood_id: neighborhood.id
end
end
end
# view
# you need to change your autocomplete to use the getter method
<%= f.input :neighborhood_names, url: autocomplete_neighborhood_name_searches_path, as: :autocomplete, input_html: { data: { delimiter: ',', multiple: true, class: "span8" } %>
last but not the least is to update find_listings
def find_listings
key = "%#{keywords}%"
listings = Listing.order(:headline).includes(:neighborhood)
if keywords.present?
listings = listings.where("listings.headline LIKE :key OR neighborhoods.name LIKE :key", { key: "#{keywords}")
end
if neighborhoods.exists?
listings = listings.where(neighborhood_id: neighborhood_ids)
end
listings
end
And that's it :)
UPDATE: using f.input_field
# view
<%= f.input_field :neighborhood_names, url: autocomplete_neighborhood_name_searches_path, as: :autocomplete, data: { delimiter: ',' }, multiple: true, class: "span8" %>
# model
# we need to put [0] because it returns an array with a single element containing
# the string of comma separated neighborhoods
def neighborhood_names=(names)
names[0].split(',').each do |name|
next if name.blank?
if neighborhood = Neighborhood.find_by_name(name)
search_neighborhoods.build neighborhood_id: neighborhood.id
end
end
end
Your problem is how you're collecting values from the neighborhood Model
Neighborhood.order(:name)
will return an array of names, you need to also collect the id, but just display the names
use collect and pass a block, I beleive this might owrk for you
Neighborhood.collect {|n| [n.name, n.id]}
Declare a scope on the Neighborhood class to order it by name if you like to get theat functionality back, as that behavior also belongs in the model anyhow.
edit>
To add a scope/class method to neighborhood model, you'd typically do soemthing like this
scope :desc, where("name DESC")
Than you can write something like:
Neighborhood.desc.all
which will return an array, thus allowing the .collect but there are other way to get those name and id attributes recognized by the select option.
I am using this named_scope to search for products that have a description matching any word the user inputs.
E.g., Product.description_like_any("choc pret")
Will return products with names like
"Chocolate Bar"
"Chocolate Covered Pretzels"
"Miniature Chocolate Ponies"
Here's the named_scope I've written (which works)
named_scope :description_like_any, (lambda do |query|
return {} unless query
conditions = []
values = []
for q in query.split(/\s+/)
conditions << "(`products`.description LIKE ?)"
values << "%#{q}%"
end
{ :conditions => [conditions.join(' AND '), *values] }
end)
Is there a better way to write this? Perhaps I'm missing a Rubyism/Railism or two?
Solution
Using scope_procedure in conjunction with Searchlogic, this can be done in an even easier way. Note, the solution before even leverages Searchlogic's _or_ syntax for connecting two scopes together. The :keywords scope_procedure finds products matching product.description, or product.vendor.name; All with one text field!
Model
# app/models/product.rb
class Product < ActiveRecord::Base
scope_procedure :keywords, lambda |query|
description_like_any_or_vendor_name_like_any(query.split(/\s+/))
end
end
Controller
# app/controllers/products_controller.rb
class ProductsController < ApplicationController
def index
#search = Product.search(params[:search])
#products = #search.all
end
end
Views
# app/views/products/index.html.erb
<% form_for #search do |f| %>
<%= f.label :keywords, "Quick Search" %>
<%= f.input :keywords %>
<%= f.submit, "Go" %>
<% end %>
The most Railsy thing to do is to not write this yourself. :-) Use the excellent Searchlogic gem which will create the description_like_any scope for you.
Edit: If you want your user to be able to enter search terms in a free text field like this, you can define your own scope:
class Product < ActiveRecord::Base
# ...
scope_procedure :description_like_any_term, lambda { |terms|
name_like_any(terms.split(/\s+/))
}
# ...
end