Noob question here :)
I'm testing a variable, and if it exists, I'd like to display an .each loop with a title.
Of course, the title should be displayed only once. Is there a way to do it? Any best practice?
<%
#twitter_friends.each do |u|
if #user = User.is_a_member?(u.id)
%>
# HERE I'D LIKE TO DISPLAY THE TITLE ONLY AT FIRST ITERATION
<% #user.name %> is your twitter friend, and is a member.
<% end %>
<% end %>
Thanks !
I would normally recommend using each_with_index and checking for a zero index, but seeing as you have a conditional in the loop, you should use a check variable like so:
<% shown_title = false %>
<% #twitter_friends.each do |u| %>
<% if #user = User.is_a_member?(u.id) %>
# HERE I'D LIKE TO DISPLAY THE TITLE ONLY AT FIRST ITERATION
<% unless shown_title %>
<h1>My Title</h1>
<% shown_title = true %>
<% end %>
<% #user.name %> is your twitter friend, and is a member.
<% end %>
<% end %>
Related
I am getting this output when I got to the /projects, which should just list projects and an associated link:
I cannot figure out why all the information from the projects table is being dumped after the list.
Controller index method:
def index
#projects = Project.all
end
index.html.erb:
<%= #projects.each do |project| %>
<li>
<%= link_to project.title, projects_path(project) %>
<%= link_to project.link, project.link %>
</li>
<% end %>
Any ideas to why this is happening?
Thanks for reading!
Change the <%= on your loop to <%:
<% #projects.each do |project| %>
What it's doing now is executing the loop and printing all your li elements, and then also printing the contents of #projects (because of the <%=).
I am not sure if the title of this question uses proper jargon, but hopefully this description will help. If you need more information, please let me know.
I am taking Chinese text from a form and splitting it into a 2d array of sentences and words. I then want to define all the words using dictionary entries in my database. Some of the words aren't in the database, so I want to check for that. What I am trying isn't working.
Here is my current code:
<% #lesson.parsed_content.each_with_index do |sentence, si| %> #iterate 1st dimension
<% sentence.each_with_index do |word,wi| %> #iterate 2nd dimension
<% sentence = sentence.to_s %>
<div class="word blt" id="<%= wi %>">
<div class="definition blt">
<% definition = DictionaryEntry.where(:simplified => word) %> #search by simplified chinese
<% definition.find_each do |w| %>
<% if w.definition == nil %> # PROBLEM: this never returns true.
<%= word %>
<% else %>
<%= w.definition %>
<% end %>
<% end %>
</div>
<div class='chinese blt'> <%= word %></div>
</div>
<% end %>
<% end %>
How can I change <% if w.definition == nil %> to return true if there is no definition in my database?
This is a shot in the dark but first I would switch your code around when you are converting the variable sentence to a string and looping through it. (unless you have a reason for it being that way)
<% sentence = sentence.to_s %>
<% sentence.each_with_index do |word,wi| %> #iterate 2nd dimension
Second, depending on how your data was put inside the database it might be an empty string instead of nil. So I would change the condition from
<% if w.definition == nil %> # PROBLEM: this never returns true.
to
<% if w.definition.blank? %> # Checks to see if definition is blank
Blank will check if its false, empty, or a whitespace string.
Finally, indentation is helpful especially when running loops and conditionals. It's easier on the eyes and helps you understand what's going on.
<% #lesson.parsed_content.each_with_index do |sentence, si| %>
<% sentence = sentence.to_s %>
<% sentence.each_with_index do |word,wi| %>
<div class="word blt" id="<%= wi %>">
<div class="definition blt">
<% definition = DictionaryEntry.where(:simplified => word) %>
<% if definition.empty? %>
<% word %>
<% else %>
<% definition.find_each do |w| %>
<%= w.definition %>
<% end %>
<% end %>
</div>
<div class='chinese blt'> <%= word %></div>
</div>
<% end %>
<% end %>
Let me know the results.
Just wondering how to dynamically name (say, in a loop) a series of instance variables. Something like this:
<% #current_issue.articles.each_with_index do |a, i| %>
<% i += 1 %>
<%= f.collection_select("article#{i}", #articles_hash1, :first, :last) %>
<% #articles1.each do |r| %>
<%= link_to(image_tag(r.image.url(:large)), r.image.url(:large), :id => 'article'+i.to_s+'_thumb'+r.id.to_s) %>
<% end %>
<% end %>
Where instead of #articles_hash1 it'd be #articles_hash[i]. I'm just not sure how to achieve that.
Cheers!
<% #current_issue.articles.each_with_index do |a, i| %>
<%= f.collection_select("article#{i}", #articles_hash[i], :first, :last) %>
<% #articles_hash[i].each do |r| %>
<%= link_to(image_tag(r.image.url(:large)), r.image.url(:large), :id => 'article'+i.to_s+'_thumb'+r.id.to_s) %>
<% end %>
<% end %>
I didn't check for any syntax issues, but this should do.
For anyone struggling with this, do yourself a favour and build an array of the instance variables in question, i.e.:
#articles = (1..3).to_a.map { |i| Article.all_articles(i).reverse }
And then loop through that array, i.e.:
<% #articles.each_with_index do |a, i| %>
<% i += 1 %>
<%= f.collection_select("article#{i}", #articles[i-1], :id, :name) %>
<% end %>
I am taking a rails class at my University and I am trying to create a search form which will show the results on the same page rather than show a different page of results. Is this something simple to do? I am creating a museum app with artifacts for each museum but I want the user to search artifacts from either page.
On my routes.rb I have
resources :artifacts do
collection do
get 'search'
end
end
On my museum index I have the code below that he gave us but not sure how to tweak the get routes for the same page.
<%= form_tag search_artifacts_path, :method => 'get' do %>
<p>
<%= text_field_tag :search_text, params[:search_text] %>
<%= submit_tag 'Search' %>
</p>
<% end %>
<% if #artifacts %>
<p> <%= #artifacts.length %> matching artifacts. </p>
<h2> Matching Artifacts </h2>
<% #artifacts.each do |a| %>
<%= link_to "#{a.name} (#{a.year})", a %><br />
<% end %>
<% end %>
Yes, this is easy. Just have the index page return the search results if params[:search_text] is present - this way you don't need a new route or a different page.
class ArtifactsController < ApplicationController
def index
#artifacts = Artifact.search(params[:search_text])
end
end
class Artifact < ActiveRecord::Base
def self.search(query)
if query
where('name ILIKE ?', "%#{query}%")
else
all
end
end
end
So then your form looks like:
<%= form_tag artifacts_path, :method => 'get' do %>
<p>
<%= text_field_tag :search_text, params[:search_text] %>
<%= submit_tag 'Search' %>
</p>
<% end %>
Edit:
So what you really want to do is any page you want to search, include a form which makes a request to that same page.
Then in each of those controller methods just put this line of code:
#artifacts = Artifact.search(params[:search_text])
and that will populate the #artifcats array with only artifacts that match the search query.
Try using "Ransack" gem. It can also perform some more powerful searches.
I have a search controller and index page:
# search/index.html.erb
<% #user_prices.each do |up| %>
# This needs to go to particular ID of UserPrice.
<%= link_to show_user_price_path do %>
<%= up.product_name %>
<% end %>
<% end %>
----------------------------------------------------------
class SearchController < ApplicationController
def index
#search = UserPrice.search do
fulltext params[:search]
paginate(:per_page => 5, :page => params[:page])
end
#user_prices = #search.results
end
end
Above you can see on my search form I am trying to link the product name to that particular UserPrice.How would I do this?
Thanks.
<%= link_to up.product_name, show_user_price_path(up) %>
That should do?
Not exactly sure why you're using the block form of link_to, if you check the link_to documentation there is an easier way to use the function to get what you want.
<% #user_prices.each do |up| %>
<%= link_to up.product_name, show_user_price_path(up) %>
<% end %>